# @ohos.bluetooth (Bluetooth)
The **Bluetooth** module provides classic Bluetooth capabilities and Bluetooth Low Energy (BLE) scan and advertising.
> **NOTE**
>
> - The initial APIs of this module are supported since API version 7. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> - The APIs provided by this module are no longer maintained since API version 9. You are advised to use [bluetoothManager](js-apis-bluetoothManager.md).
## Modules to Import
```js
import bluetooth from '@ohos.bluetooth';
```
## bluetooth.enableBluetooth8+(deprecated)
enableBluetooth(): boolean
Enables Bluetooth.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.enableBluetooth](js-apis-bluetoothManager.md#bluetoothmanagerenablebluetooth).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | ------------------------ |
| boolean | Returns **true** if Bluetooth is enabled; returns **false** otherwise.|
**Example**
```js
let enable = bluetooth.enableBluetooth();
```
## bluetooth.disableBluetooth8+(deprecated)
disableBluetooth(): boolean
Disables Bluetooth.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.disableBluetooth](js-apis-bluetoothManager.md#bluetoothmanagerdisablebluetooth).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | ------------------------ |
| boolean | Returns **true** if Bluetooth is disabled; returns **false** otherwise.|
**Example**
```js
let disable = bluetooth.disableBluetooth();
```
## bluetooth.getLocalName8+(deprecated)
getLocalName(): string
Obtains the name of the local Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getLocalName](js-apis-bluetoothManager.md#bluetoothmanagergetlocalname).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------ | --------- |
| string | Name of the local Bluetooth device obtained.|
**Example**
```js
let localName = bluetooth.getLocalName();
```
## bluetooth.getState(deprecated)
getState(): BluetoothState
Obtains the Bluetooth state.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.getState](js-apis-bluetoothManager.md#bluetoothmanagergetstate).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| --------------------------------- | --------- |
| [BluetoothState](#bluetoothstate) | Bluetooth state obtained.|
**Example**
```js
let state = bluetooth.getState();
```
## bluetooth.getBtConnectionState(deprecated)
getBtConnectionState(): ProfileConnectionState
Obtains the local profile connection state.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.getBtConnectionState](js-apis-bluetoothManager.md#bluetoothmanagergetbtconnectionstate).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ---------------------------------------- | ------------------- |
| [ProfileConnectionState](#profileconnectionstate) | Profile connection state obtained.|
**Example**
```js
let connectionState = bluetooth.getBtConnectionState();
```
## bluetooth.setLocalName8+(deprecated)
setLocalName(name: string): boolean
Sets the name of the local Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.setLocalName](js-apis-bluetoothManager.md#bluetoothmanagersetlocalname).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ---- | ------ | ---- | --------------------- |
| name | string | Yes | Bluetooth device name to set. It cannot exceed 248 bytes.|
**Return value**
| Type | Description |
| ------- | ------------------------------ |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let ret = bluetooth.setLocalName('device_name');
```
## bluetooth.pairDevice(deprecated)
pairDevice(deviceId: string): boolean
Initiates Bluetooth pairing.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.pairDevice](js-apis-bluetoothManager.md#bluetoothmanagerpairdevice).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ------ | ---- | ----------------------------------- |
| deviceId | string | Yes | Address of the remote device to pair, for example, XX:XX:XX:XX:XX:XX.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// The address can be scanned.
let result = bluetooth.pairDevice("XX:XX:XX:XX:XX:XX");
```
## bluetooth.getProfileConnState8+(deprecated)
getProfileConnState(profileId: ProfileId): ProfileConnectionState
Obtains the connection status of a specified profile.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getProfileConnectionState](js-apis-bluetoothManager.md#bluetoothmanagergetprofileconnectionstate).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| --------- | --------- | ---- | ------------------------------------- |
| ProfileId | profileId | Yes | ID of the profile to obtain, for example, **PROFILE_A2DP_SOURCE**.|
**Return value**
| Type | Description |
| ------------------------------------------------- | ------------------- |
| [ProfileConnectionState](#profileconnectionstate) | Profile connection state obtained.|
**Example**
```js
let result = bluetooth.getProfileConnState(bluetooth.ProfileId.PROFILE_A2DP_SOURCE);
```
## bluetooth.cancelPairedDevice8+(deprecated)
cancelPairedDevice(deviceId: string): boolean
Cancels a paired remote device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.cancelPairedDevice](js-apis-bluetoothManager.md#bluetoothmanagercancelpaireddevice).
**System API**: This is a system API.
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ------ | ---- | ------------------------------------- |
| deviceId | string | Yes | Address of the remote device to cancel, for example, XX:XX:XX:XX:XX:XX.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let result = bluetooth.cancelPairedDevice("XX:XX:XX:XX:XX:XX");
```
## bluetooth.getRemoteDeviceName8+(deprecated)
getRemoteDeviceName(deviceId: string): string
Obtains the name of the remote Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getRemoteDeviceName](js-apis-bluetoothManager.md#bluetoothmanagergetremotedevicename).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ------ | ---- | --------------------------------- |
| deviceId | string | Yes | Address of the target remote device, for example, XX:XX:XX:XX:XX:XX.|
**Return value**
| Type | Description |
| ------ | ------------- |
| string | Device name (a string) obtained.|
**Example**
```js
let remoteDeviceName = bluetooth.getRemoteDeviceName("XX:XX:XX:XX:XX:XX");
```
## bluetooth.getRemoteDeviceClass8+(deprecated)
getRemoteDeviceClass(deviceId: string): DeviceClass
Obtains the class of the remote Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getRemoteDeviceClass](js-apis-bluetoothManager.md#bluetoothmanagergetremotedeviceclass).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ------ | ---- | --------------------------------- |
| deviceId | string | Yes | Address of the target remote device, for example, XX:XX:XX:XX:XX:XX.|
**Return value**
| Type | Description |
| --------------------------- | -------- |
| [DeviceClass](#deviceclass) | Class of the remote device obtained.|
**Example**
```js
let remoteDeviceClass = bluetooth.getRemoteDeviceClass("XX:XX:XX:XX:XX:XX");
```
## bluetooth.getPairedDevices8+(deprecated)
getPairedDevices(): Array<string>
Obtains the paired devices.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getPairedDevices](js-apis-bluetoothManager.md#bluetoothmanagergetpaireddevices).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------------------- | ------------- |
| Array<string> | Addresses of the paired Bluetooth devices.|
**Example**
```js
let devices = bluetooth.getPairedDevices();
```
## bluetooth.setBluetoothScanMode8+(deprecated)
setBluetoothScanMode(mode: ScanMode, duration: number): boolean
Sets the Bluetooth scan mode so that the device can be discovered by a remote device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.setBluetoothScanMode](js-apis-bluetoothManager.md#bluetoothmanagersetbluetoothscanmode).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | --------------------- | ---- | ---------------------------- |
| mode | [ScanMode](#scanmode) | Yes | Bluetooth scan mode to set. |
| duration | number | Yes | Duration (in ms) in which the device can be discovered. The value **0** indicates unlimited time.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// The device can be discovered and connected only when the discoverable and connectable mode is used.
let result = bluetooth.setBluetoothScanMode(bluetooth.ScanMode.SCAN_MODE_CONNECTABLE_GENERAL_DISCOVERABLE, 100);
```
## bluetooth.getBluetoothScanMode8+(deprecated)
getBluetoothScanMode(): ScanMode
Obtains the Bluetooth scan mode.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getBluetoothScanMode](js-apis-bluetoothManager.md#bluetoothmanagergetbluetoothscanmode).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| --------------------- | ------- |
| [ScanMode](#scanmode) | Bluetooth scan mode obtained.|
**Example**
```js
let scanMode = bluetooth.getBluetoothScanMode();
```
## bluetooth.startBluetoothDiscovery8+(deprecated)
startBluetoothDiscovery(): boolean
Starts Bluetooth scan to discover remote devices.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.startBluetoothDiscovery](js-apis-bluetoothManager.md#bluetoothmanagerstartbluetoothdiscovery).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH and ohos.permission.LOCATION
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let deviceId;
function onReceiveEvent(data) {
deviceId = data;
}
bluetooth.on('bluetoothDeviceFind', onReceiveEvent);
let result = bluetooth.startBluetoothDiscovery();
```
## bluetooth.stopBluetoothDiscovery8+(deprecated)
stopBluetoothDiscovery(): boolean
Stops Bluetooth scan.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.stopBluetoothDiscovery](js-apis-bluetoothManager.md#bluetoothmanagerstopbluetoothdiscovery).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let result = bluetooth.stopBluetoothDiscovery();
```
## bluetooth.setDevicePairingConfirmation8+(deprecated)
setDevicePairingConfirmation(device: string, accept: boolean): boolean
Sets the device pairing confirmation.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.setDevicePairingConfirmation](js-apis-bluetoothManager.md#bluetoothmanagersetdevicepairingconfirmation).
**Required permissions**: ohos.permission.MANAGE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------- | ---- | -------------------------------- |
| device | string | Yes | Address of the remote device, for example, XX:XX:XX:XX:XX:XX.|
| accept | boolean | Yes | Whether to accept the pairing request. The value **true** means to accept the pairing request, and the value **false** means the opposite. |
**Return value**
| Type | Description |
| ------- | ---------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// Subscribe to the pinRequired event and configure the pairing confirmation after receiving a pairing request from the remote device.
function onReceivePinRequiredEvent(data) { // data is the input parameter for the pairing request.
console.info('pin required = '+ JSON.stringify(data));
bluetooth.setDevicePairingConfirmation(data.deviceId, true);
}
bluetooth.on("pinRequired", onReceivePinRequiredEvent);
```
## bluetooth.on('bluetoothDeviceFind')8+(deprecated)
on(type: "bluetoothDeviceFind", callback: Callback<Array<string>>): void
Subscribes to the Bluetooth device discovery events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.on('bluetoothDeviceFind')](js-apis-bluetoothManager.md#bluetoothmanageronbluetoothdevicefind).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ----------------------------------- | ---- | -------------------------------------- |
| type | string | Yes | Event type. The value **bluetoothDeviceFind** indicates an event reported when a Bluetooth device is discovered.|
| callback | Callback<Array<string>> | Yes | Callback invoked to return the discovered devices. You need to implement this callback. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) { // data is a set of Bluetooth device addresses.
console.info('bluetooth device find = '+ JSON.stringify(data));
}
bluetooth.on('bluetoothDeviceFind', onReceiveEvent);
```
## bluetooth.off('bluetoothDeviceFind')8+(deprecated)
off(type: "bluetoothDeviceFind", callback?: Callback<Array<string>>): void
Unsubscribes from the Bluetooth device discovery events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.off('bluetoothDeviceFind')](js-apis-bluetoothManager.md#bluetoothmanageroffbluetoothdevicefind).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ----------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **bluetoothDeviceFind** indicates an event reported when a Bluetooth device is discovered. |
| callback | Callback<Array<string>> | No | Callback for the **bluetoothDeviceFind** event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bluetooth device find = '+ JSON.stringify(data));
}
bluetooth.on('bluetoothDeviceFind', onReceiveEvent);
bluetooth.off('bluetoothDeviceFind', onReceiveEvent);
```
## bluetooth.on('pinRequired')8+(deprecated)
on(type: "pinRequired", callback: Callback<PinRequiredParam>): void
Subscribes to the pairing request events of the remote Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.on('pinRequired')](js-apis-bluetoothManager.md#bluetoothmanageronpinrequired).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | -------------------------------- |
| type | string | Yes | Event type. The value **pinRequired** indicates a pairing request event. |
| callback | Callback<[PinRequiredParam](#pinrequiredparam)> | Yes | Callback invoked to return the pairing request. You need to implement this callback.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) { // data is the pairing request parameter.
console.info('pin required = '+ JSON.stringify(data));
}
bluetooth.on('pinRequired', onReceiveEvent);
```
## bluetooth.off('pinRequired')8+(deprecated)
off(type: "pinRequired", callback?: Callback<PinRequiredParam>): void
Unsubscribes from the pairing request events of the remote Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.off('pinRequired')](js-apis-bluetoothManager.md#bluetoothmanageroffpinrequired).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **pinRequired** indicates a pairing request event. |
| callback | Callback<[PinRequiredParam](#pinrequiredparam)> | No | Callback for the Bluetooth pairing request event. The input parameter is the pairing request parameter. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('pin required = '+ JSON.stringify(data));
}
bluetooth.on('pinRequired', onReceiveEvent);
bluetooth.off('pinRequired', onReceiveEvent);
```
## bluetooth.on('bondStateChange')8+(deprecated)
on(type: "bondStateChange", callback: Callback<BondStateParam>): void
Subscribes to the Bluetooth pairing state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.on('bondStateChange')](js-apis-bluetoothManager.md#bluetoothmanageronbondstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ------------------------------------ |
| type | string | Yes | Event type. The value **bondStateChange** indicates a Bluetooth pairing state change event.|
| callback | Callback<[BondStateParam](#BondStateParam)> | Yes | Callback invoked to return the pairing state. You need to implement this callback. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) { // data, as the input parameter of the callback, indicates the pairing state.
console.info('pair state = '+ JSON.stringify(data));
}
bluetooth.on('bondStateChange', onReceiveEvent);
```
## bluetooth.off('bondStateChange')8+(deprecated)
off(type: "bondStateChange", callback?: Callback<BondStateParam>): void
Unsubscribes from the Bluetooth pairing state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.off('bondStateChange')](js-apis-bluetoothManager.md#bluetoothmanageroffbondstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **bondStateChange** indicates a Bluetooth pairing state change event. |
| callback | Callback<[BondStateParam](#BondStateParam)> | No | Callback for the change of the Bluetooth pairing state. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bond state = '+ JSON.stringify(data));
}
bluetooth.on('bondStateChange', onReceiveEvent);
bluetooth.off('bondStateChange', onReceiveEvent);
```
## bluetooth.on('stateChange')8+(deprecated)
on(type: "stateChange", callback: Callback<BluetoothState>): void
Subscribes to the Bluetooth connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.on('stateChange')](js-apis-bluetoothManager.md#bluetoothmanageronstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | -------------------------------- |
| type | string | Yes | Event type. The value **stateChange** indicates a Bluetooth connection state change event. |
| callback | Callback<[BluetoothState](#bluetoothstate)> | Yes | Callback invoked to return the Bluetooth connection state. You need to implement this callback.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bluetooth state = '+ JSON.stringify(data));
}
bluetooth.on('stateChange', onReceiveEvent);
```
## bluetooth.off('stateChange')8+(deprecated)
off(type: "stateChange", callback?: Callback<BluetoothState>): void
Unsubscribes from the Bluetooth connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.off('stateChange')](js-apis-bluetoothManager.md#bluetoothmanageroffstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **stateChange** indicates a Bluetooth connection state change event. |
| callback | Callback<[BluetoothState](#bluetoothstate)> | No | Callback for the Bluetooth connection state change event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bluetooth state = '+ JSON.stringify(data));
}
bluetooth.on('stateChange', onReceiveEvent);
bluetooth.off('stateChange', onReceiveEvent);
```
## bluetooth.sppListen8+(deprecated)
sppListen(name: string, option: SppOption, callback: AsyncCallback<number>): void
Creates a server listening socket.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppListen](js-apis-bluetoothManager.md#bluetoothmanagerspplisten).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | --------------------------- | ---- | ----------------------- |
| name | string | Yes | Name of the service. |
| option | [SppOption](#sppoption) | Yes | Serial port profile (SPP) listening configuration. |
| callback | AsyncCallback<number> | Yes | Callback invoked to return the server socket ID.|
**Example**
```js
let serverNumber = -1;
function serverSocket(code, number) {
console.log('bluetooth error code: ' + code.code);
if (code.code == 0) {
console.log('bluetooth serverSocket Number: ' + number);
serverNumber = number;
}
}
let sppOption = {uuid: '00001810-0000-1000-8000-00805F9B34FB', secure: false, type: 0};
bluetooth.sppListen('server1', sppOption, serverSocket);
```
## bluetooth.sppAccept8+(deprecated)
sppAccept(serverSocket: number, callback: AsyncCallback<number>): void
Listens for a connection to be made to this socket from the client and accepts it.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppAccept](js-apis-bluetoothManager.md#bluetoothmanagersppaccept).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------------ | --------------------------- | ---- | ----------------------- |
| serverSocket | number | Yes | Server socket ID. |
| callback | AsyncCallback<number> | Yes | Callback invoked to return the client socket ID.|
**Example**
```js
let serverNumber = -1;
function serverSocket(code, number) {
console.log('bluetooth error code: ' + code.code);
if (code.code == 0) {
console.log('bluetooth serverSocket Number: ' + number);
serverNumber = number;
}
}
let clientNumber = -1;
function acceptClientSocket(code, number) {
console.log('bluetooth error code: ' + code.code);
if (code.code == 0) {
console.log('bluetooth clientSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the server.
clientNumber = number;
}
}
bluetooth.sppAccept(serverNumber, acceptClientSocket);
```
## bluetooth.sppConnect8+(deprecated)
sppConnect(device: string, option: SppOption, callback: AsyncCallback<number>): void
Initiates an SPP connection to a remote device from the client.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppConnect](js-apis-bluetoothManager.md#bluetoothmanagersppconnect).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | --------------------------- | ---- | ------------------------------ |
| device | string | Yes | Address of the remote device, for example, XX:XX:XX:XX:XX:XX.|
| option | [SppOption](#sppoption) | Yes | Configuration for connecting to the SPP client. |
| callback | AsyncCallback<number> | Yes | Callback invoked to return the client socket ID. |
**Example**
```js
let clientNumber = -1;
function clientSocket(code, number) {
if (code.code != 0) {
return;
}
console.log('bluetooth serverSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the client.
clientNumber = number;
}
let sppOption = {uuid: '00001810-0000-1000-8000-00805F9B34FB', secure: false, type: 0};
bluetooth.sppConnect('XX:XX:XX:XX:XX:XX', sppOption, clientSocket);
```
## bluetooth.sppCloseServerSocket8+(deprecated)
sppCloseServerSocket(socket: number): void
Closes the listening socket of the server.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppCloseServerSocket](js-apis-bluetoothManager.md#bluetoothmanagersppcloseserversocket).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | --------------- |
| socket | number | Yes | ID of the listening socket on the server. The ID is obtained by **sppListen**.|
**Example**
```js
let serverNumber = -1;
function serverSocket(code, number) {
console.log('bluetooth error code: ' + code.code);
if (code.code == 0) {
console.log('bluetooth serverSocket Number: ' + number);
serverNumber = number;
}
}
bluetooth.sppCloseServerSocket(serverNumber);
```
## bluetooth.sppCloseClientSocket8+(deprecated)
sppCloseClientSocket(socket: number): void
Closes the client socket.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppCloseClientSocket](js-apis-bluetoothManager.md#bluetoothmanagersppcloseclientsocket).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------------- |
| Name | Type | Mandatory | Description |
| socket | number | Yes | Client socket ID, which is obtained by **sppAccept** or **sppConnect**.|
**Example**
```js
let clientNumber = -1;
function clientSocket(code, number) {
if (code.code != 0) {
return;
}
console.log('bluetooth serverSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the client.
clientNumber = number;
}
bluetooth.sppCloseClientSocket(clientNumber);
```
## bluetooth.sppWrite8+(deprecated)
sppWrite(clientSocket: number, data: ArrayBuffer): boolean
Writes data to the remote device through the socket.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.sppWrite](js-apis-bluetoothManager.md#bluetoothmanagersppwrite).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------------ | ----------- | ---- | ------------- |
| clientSocket | number | Yes | Client socket ID, which is obtained by **sppAccept** or **sppConnect**.|
| data | ArrayBuffer | Yes | Data to write. |
**Return value**
| Type | Description |
| ------- | ------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let clientNumber = -1;
function clientSocket(code, number) {
if (code.code != 0) {
return;
}
console.log('bluetooth serverSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the client.
clientNumber = number;
}
let arrayBuffer = new ArrayBuffer(8);
let data = new Uint8Array(arrayBuffer);
data[0] = 123;
let ret = bluetooth.sppWrite(clientNumber, arrayBuffer);
if (ret) {
console.log('spp write successfully');
} else {
console.log('spp write failed');
}
```
## bluetooth.on('sppRead')8+(deprecated)
on(type: "sppRead", clientSocket: number, callback: Callback<ArrayBuffer>): void
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.on('sppRead')](js-apis-bluetoothManager.md#bluetoothmanageronsppread).
Subscribes to the SPP read request events.
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------------ | --------------------------- | ---- | -------------------------- |
| type | string | Yes | Event type. The value **sppRead** indicates an SPP read request event.|
| clientSocket | number | Yes | Client socket ID, which is obtained by **sppAccept** or **sppConnect**. |
| callback | Callback<ArrayBuffer> | Yes | Callback invoked to return the data read. |
**Return value**
No value is returned.
**Example**
```js
let clientNumber = -1;
function clientSocket(code, number) {
if (code.code != 0) {
return;
}
console.log('bluetooth serverSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the client.
clientNumber = number;
}
function dataRead(dataBuffer) {
let data = new Uint8Array(dataBuffer);
console.log('bluetooth data is: ' + data[0]);
}
bluetooth.on('sppRead', clientNumber, dataRead);
```
## bluetooth.off('sppRead')8+(deprecated)
off(type: "sppRead", clientSocket: number, callback?: Callback<ArrayBuffer>): void
Unsubscribes from the SPP read request events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.off('sppRead')](js-apis-bluetoothManager.md#bluetoothmanageroffsppread).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------------ | --------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **sppRead** indicates an SPP read request event. |
| clientSocket | number | Yes | Client socket ID, which is obtained by **sppAccept** or **sppConnect**. |
| callback | Callback<ArrayBuffer> | No | Callback for the SPP read request event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let clientNumber = -1;
function clientSocket(code, number) {
if (code.code != 0) {
return;
}
console.log('bluetooth serverSocket Number: ' + number);
// The obtained clientNumber is used as the socket ID for subsequent read/write operations on the client.
clientNumber = number;
}
bluetooth.off('sppRead', clientNumber);
```
## bluetooth.getProfile8+(deprecated)
getProfile(profileId: ProfileId): A2dpSourceProfile | HandsFreeAudioGatewayProfile
Obtains a profile object.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.getProfileInstance](js-apis-bluetoothManager.md#bluetoothmanagergetprofileinstance).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| --------- | --------- | ---- | ------------------------------------- |
| profileId | [ProfileId](#ProfileId) | Yes | ID of the profile to obtain, for example, **PROFILE_A2DP_SOURCE**.|
**Return value**
| Type | Description |
| ------------------------------------------------------------ | ------------------------------------------------------------ |
| [A2dpSourceProfile](#a2dpsourceprofile) or [HandsFreeAudioGatewayProfile](#handsfreeaudiogatewayprofile)| Profile object obtained. Only **A2dpSourceProfile** and **HandsFreeAudioGatewayProfile** are supported.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE);
```
## bluetooth.BLE
### bluetooth.BLE.createGattServer(deprecated)
createGattServer(): GattServer
Creates a **GattServer** instance.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.createGattServer](js-apis-bluetoothManager.md#bluetoothmanagerblecreategattserver).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------------------------- | ------------------------------------ |
| [GattServer](#gattserver) | **GattServer** instance created. Before using a method of the server, you must create a **GattSever** instance.|
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
```
### bluetooth.BLE.createGattClientDevice(deprecated)
createGattClientDevice(deviceId: string): GattClientDevice
Creates a **GattClientDevice** instance.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.createGattClientDevice](js-apis-bluetoothManager.md#bluetoothmanagerblecreategattclientdevice).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ------ | ---- | ------------------------------------ |
| deviceId | string | Yes | Address of the remote device, for example, XX:XX:XX:XX:XX:XX.|
**Return value**
| Type | Description |
| ------------------------------------- | ------------------------------------ |
| [GattClientDevice](#gattclientdevice) | **GattClientDevice** instance created. Before using a method of the client, you must create a **GattClientDevice** instance.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
```
### bluetooth.BLE.getConnectedBLEDevices(deprecated)
getConnectedBLEDevices(): Array<string>
Obtains the BLE devices connected to this device.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.getConnectedBLEDevices](js-apis-bluetoothManager.md#bluetoothmanagerblegetconnectedbledevices).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------------------- | ------------------- |
| Array<string> | Addresses of the BLE devices connected to this device.|
**Example**
```js
let result = bluetooth.BLE.getConnectedBLEDevices();
```
### bluetooth.BLE.startBLEScan(deprecated)
startBLEScan(filters: Array<ScanFilter>, options?: ScanOptions): void
Starts a BLE scan.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.startBLEScan](js-apis-bluetoothManager.md#bluetoothmanagerblestartblescan).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH, ohos.permission.MANAGE_BLUETOOTH, and ohos.permission.LOCATION
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------- | -------------------------------------- | ---- | ----------------------------------- |
| filters | Array<[ScanFilter](#scanfilter)> | Yes | Criteria for filtering the scan result. Set this parameter to **null** if you do not want to filter the scan result.|
| options | [ScanOptions](#scanoptions) | No | Scan options. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('BLE scan device find result = '+ JSON.stringify(data));
}
bluetooth.BLE.on("BLEDeviceFind", onReceiveEvent);
bluetooth.BLE.startBLEScan(
[{
deviceId:"XX:XX:XX:XX:XX:XX",
name:"test",
serviceUuid:"00001888-0000-1000-8000-00805f9b34fb"
}],
{
interval: 500,
dutyMode: bluetooth.ScanDuty.SCAN_MODE_LOW_POWER,
matchMode: bluetooth.MatchMode.MATCH_MODE_AGGRESSIVE,
}
);
```
### bluetooth.BLE.stopBLEScan(deprecated)
stopBLEScan(): void
Stops the BLE scan.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.stopBLEScan](js-apis-bluetoothManager.md#bluetoothmanagerblestopblescan).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
No value is returned.
**Example**
```js
bluetooth.BLE.stopBLEScan();
```
### bluetooth.BLE.on('BLEDeviceFind')(deprecated)
on(type: "BLEDeviceFind", callback: Callback<Array<ScanResult>>): void
Subscribe to the BLE device discovery events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.on('BLEDeviceFind')](js-apis-bluetoothManager.md#bluetoothmanagerbleonbledevicefind).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ----------------------------------- |
| type | string | Yes | Event type. The value **BLEDeviceFind** indicates an event reported when a BLE device is discovered. |
| callback | Callback<Array<[ScanResult](#scanresult)>> | Yes | Callback invoked to return the discovered devices. You need to implement this callback.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bluetooth device find = '+ JSON.stringify(data));
}
bluetooth.BLE.on('BLEDeviceFind', onReceiveEvent);
```
### bluetooth.BLE.off('BLEDeviceFind')(deprecated)
off(type: "BLEDeviceFind", callback?: Callback<Array<ScanResult>>): void
Unsubscribes from the BLE device discovery events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLE.off('BLEDeviceFind')](js-apis-bluetoothManager.md#bluetoothmanagerbleoffbledevicefind).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **BLEDeviceFind** indicates an event reported when a BLE device is discovered. |
| callback | Callback<Array<[ScanResult](#scanresult)>> | No | Callback for the **BLEDeviceFind** event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('bluetooth device find = '+ JSON.stringify(data));
}
bluetooth.BLE.on('BLEDeviceFind', onReceiveEvent);
bluetooth.BLE.off('BLEDeviceFind', onReceiveEvent);
```
## BaseProfile
Provides the profile base class.
### getConnectionDevices8+(deprecated)
getConnectionDevices(): Array<string>
Obtains the connected devices.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.BaseProfile.getConnectionDevices](js-apis-bluetoothManager.md#getconnectiondevices).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------------------- | ------------- |
| Array<string> | Addresses of the connected devices.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
let retArray = a2dpSrc.getConnectionDevices();
```
### getDeviceState8+(deprecated)
getDeviceState(device: string): ProfileConnectionState
Obtains the connection state of the profile.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.BaseProfile.getDeviceState](js-apis-bluetoothManager.md#getdevicestate).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ------------------------------------------------- | ----------------------- |
| [ProfileConnectionState](#profileconnectionstate) | Profile connection state obtained.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
let ret = a2dpSrc.getDeviceState('XX:XX:XX:XX:XX:XX');
```
## A2dpSourceProfile
Before using a method of **A2dpSourceProfile**, you need to create an instance of this class by using the **getProfile()** method.
### connect8+(deprecated)
connect(device: string): boolean
Sets up an Advanced Audio Distribution Profile (A2DP) connection.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.A2dpSourceProfile.connect](js-apis-bluetoothManager.md#connect).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ------- | ------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
let ret = a2dpSrc.connect('XX:XX:XX:XX:XX:XX');
```
### disconnect8+(deprecated)
disconnect(device: string): boolean
Disconnects an A2DP connection.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.A2dpSourceProfile.disconnect](js-apis-bluetoothManager.md#disconnect).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ------- | ------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
let ret = a2dpSrc.disconnect('XX:XX:XX:XX:XX:XX');
```
### on('connectionStateChange')8+(deprecated)
on(type: "connectionStateChange", callback: Callback<[StateChangeParam](#StateChangeParam)>): void
Subscribes to the A2DP connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.A2dpSourceProfile.on('connectionStateChange')](js-apis-bluetoothManager.md#onconnectionstatechange).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectionStateChange** indicates an A2DP connection state change event.|
| callback | Callback<[StateChangeParam](#StateChangeParam)> | Yes | Callback invoked to return the A2DP connection state change event. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('a2dp state = '+ JSON.stringify(data));
}
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
a2dpSrc.on('connectionStateChange', onReceiveEvent);
```
### off('connectionStateChange')8+(deprecated)
off(type: "connectionStateChange", callback?: Callback<[StateChangeParam](#StateChangeParam)>): void
Unsubscribes from the A2DP connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.A2dpSourceProfile.off('connectionStateChange')](js-apis-bluetoothManager.md#offconnectionstatechange).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectionStateChange** indicates an A2DP connection state change event.|
| callback | Callback<[StateChangeParam](#StateChangeParam)> | No | Callback for the A2DP connection state change event. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('a2dp state = '+ JSON.stringify(data));
}
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
a2dpSrc.on('connectionStateChange', onReceiveEvent);
a2dpSrc.off('connectionStateChange', onReceiveEvent);
```
### getPlayingState8+(deprecated)
getPlayingState(device: string): PlayingState
Obtains the playing state of a device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.A2dpSourceProfile.getPlayingState](js-apis-bluetoothManager.md#getplayingstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ----------------------------- | ---------- |
| [PlayingState](#PlayingState) | Playing state of the remote device obtained.|
**Example**
```js
let a2dpSrc = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_A2DP_SOURCE) as bluetooth.A2dpSourceProfile;
let state = a2dpSrc.getPlayingState('XX:XX:XX:XX:XX:XX');
```
## HandsFreeAudioGatewayProfile
Before using a method of **HandsFreeAudioGatewayProfile**, you need to create an instance of this class by using the **getProfile()** method.
### connect8+(deprecated)
connect(device: string): boolean
Sets up a Hands-free Profile (HFP) connection of a device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.HandsFreeAudioGatewayProfile.connect](js-apis-bluetoothManager.md#connect-1).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ------- | ------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let hfpAg = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_HANDS_FREE_AUDIO_GATEWAY) as
bluetooth.HandsFreeAudioGatewayProfile;
let ret = hfpAg.connect('XX:XX:XX:XX:XX:XX');
```
### disconnect8+(deprecated)
disconnect(device: string): boolean
Disconnects the HFP connection of a device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.HandsFreeAudioGatewayProfile.disconnect](js-apis-bluetoothManager.md#disconnect-1).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------ | ------ | ---- | ------- |
| device | string | Yes | Address of the target device.|
**Return value**
| Type | Description |
| ------- | ------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let hfpAg = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_HANDS_FREE_AUDIO_GATEWAY) as
bluetooth.HandsFreeAudioGatewayProfile;
let ret = hfpAg.disconnect('XX:XX:XX:XX:XX:XX');
```
### on('connectionStateChange')8+(deprecated)
on(type: "connectionStateChange", callback: Callback<[StateChangeParam](#StateChangeParam)>): void
Subscribes to the HFP connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.HandsFreeAudioGatewayProfile.on('connectionStateChange')](js-apis-bluetoothManager.md#onconnectionstatechange-1).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectionStateChange** indicates an HFP connection state change event.|
| callback | Callback<[StateChangeParam](#StateChangeParam)> | Yes | Callback invoked to return the HFP connection state change event. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('hfp state = '+ JSON.stringify(data));
}
let hfpAg = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_HANDS_FREE_AUDIO_GATEWAY) as
bluetooth.HandsFreeAudioGatewayProfile;
hfpAg.on('connectionStateChange', onReceiveEvent);
```
### off('connectionStateChange')8+(deprecated)
off(type: "connectionStateChange", callback?: Callback<[StateChangeParam](#StateChangeParam)>): void
Unsubscribes from the HFP connection state change events.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.HandsFreeAudioGatewayProfile.off('connectionStateChange')](js-apis-bluetoothManager.md#offconnectionstatechange-1).
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectionStateChange** indicates an HFP connection state change event.|
| callback | Callback<[StateChangeParam](#StateChangeParam)> | No | Callback for the HFP connection state change event. |
**Return value**
No value is returned.
**Example**
```js
function onReceiveEvent(data) {
console.info('hfp state = '+ JSON.stringify(data));
}
let hfpAg = bluetooth.getProfile(bluetooth.ProfileId.PROFILE_HANDS_FREE_AUDIO_GATEWAY) as
bluetooth.HandsFreeAudioGatewayProfile;
hfpAg.on('connectionStateChange', onReceiveEvent);
hfpAg.off('connectionStateChange', onReceiveEvent);
```
## GattServer
Implements the Generic Attribute Profile (GATT) server. Before using a method of this class, you need to create a **GattServer** instance using the **createGattServer()** method.
### startAdvertising(deprecated)
startAdvertising(setting: AdvertiseSetting, advData: AdvertiseData, advResponse?: AdvertiseData): void
Starts BLE advertising.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.startAdvertising](js-apis-bluetoothManager.md#startadvertising).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ----------- | ------------------------------------- | ---- | -------------- |
| setting | [AdvertiseSetting](#advertisesetting) | Yes | Settings related to BLE advertising. |
| advData | [AdvertiseData](#advertisedata) | Yes | Content of the BLE advertisement packet. |
| advResponse | [AdvertiseData](#advertisedata) | No | Response to the BLE scan request.|
**Return value**
No value is returned.
**Example**
```js
let manufactureValueBuffer = new Uint8Array(4);
manufactureValueBuffer[0] = 1;
manufactureValueBuffer[1] = 2;
manufactureValueBuffer[2] = 3;
manufactureValueBuffer[3] = 4;
let serviceValueBuffer = new Uint8Array(4);
serviceValueBuffer[0] = 4;
serviceValueBuffer[1] = 6;
serviceValueBuffer[2] = 7;
serviceValueBuffer[3] = 8;
console.info('manufactureValueBuffer = '+ JSON.stringify(manufactureValueBuffer));
console.info('serviceValueBuffer = '+ JSON.stringify(serviceValueBuffer));
let gattServer = bluetooth.BLE.createGattServer();
gattServer.startAdvertising({
interval:150,
txPower:60,
connectable:true,
},{
serviceUuids:["00001888-0000-1000-8000-00805f9b34fb"],
manufactureData:[{
manufactureId:4567,
manufactureValue:manufactureValueBuffer.buffer
}],
serviceData:[{
serviceUuid:"00001888-0000-1000-8000-00805f9b34fb",
serviceValue:serviceValueBuffer.buffer
}],
},{
serviceUuids:["00001889-0000-1000-8000-00805f9b34fb"],
manufactureData:[{
manufactureId:1789,
manufactureValue:manufactureValueBuffer.buffer
}],
serviceData:[{
serviceUuid:"00001889-0000-1000-8000-00805f9b34fb",
serviceValue:serviceValueBuffer.buffer
}],
});
```
### stopAdvertising(deprecated)
stopAdvertising(): void
Stops BLE advertising.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.stopAdvertising](js-apis-bluetoothManager.md#stopadvertising).
**Required permissions**: ohos.permission.DISCOVER_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
No value is returned.
**Example**
```js
let server = bluetooth.BLE.createGattServer();
server.stopAdvertising();
```
### addService(deprecated)
addService(service: GattService): boolean
Adds a service to this GATT server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.addService](js-apis-bluetoothManager.md#addservice).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ------- | --------------------------- | ---- | ------------------------ |
| service | [GattService](#gattservice) | Yes | Service to add. Settings related to BLE advertising.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// Create descriptors.
let descriptors = [];
let arrayBuffer = new ArrayBuffer(8);
let descV = new Uint8Array(arrayBuffer);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002902-0000-1000-8000-00805F9B34FB', descriptorValue: arrayBuffer};
descriptors[0] = descriptor;
// Create characteristics.
let characteristics = [];
let arrayBufferC = new ArrayBuffer(8);
let cccV = new Uint8Array(arrayBufferC);
cccV[0] = 1;
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB', characteristicValue: arrayBufferC, descriptors:descriptors};
let characteristicN = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001821-0000-1000-8000-00805F9B34FB', characteristicValue: arrayBufferC, descriptors:descriptors};
characteristics[0] = characteristic;
// Create a gattService instance.
let gattService = {serviceUuid:'00001810-0000-1000-8000-00805F9B34FB', isPrimary: true, characteristics:characteristics, includeServices:[]};
let gattServer = bluetooth.BLE.createGattServer();
let ret = gattServer.addService(gattService);
if (ret) {
console.log("add service successfully");
} else {
console.log("add service failed");
}
```
### removeService(deprecated)
removeService(serviceUuid: string): boolean
Removes a service from this GATT server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.removeService](js-apis-bluetoothManager.md#removeservice).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ----------- | ------ | ---- | ---------------------------------------- |
| serviceUuid | string | Yes | Universally unique identifier (UUID) of the service to remove, for example, **00001810-0000-1000-8000-00805F9B34FB**.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let server = bluetooth.BLE.createGattServer();
server.removeService('00001810-0000-1000-8000-00805F9B34FB');
```
### close(deprecated)
close(): void
Closes this GATT server to unregister it from the protocol stack. After this method is called, this [GattServer](#gattserver) cannot be used.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.close](js-apis-bluetoothManager.md#close).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Example**
```js
let server = bluetooth.BLE.createGattServer();
server.close();
```
### notifyCharacteristicChanged(deprecated)
notifyCharacteristicChanged(deviceId: string, notifyCharacteristic: NotifyCharacteristic): boolean
Notifies the connected client device when a characteristic value changes.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.notifyCharacteristicChanged](js-apis-bluetoothManager.md#notifycharacteristicchanged).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------------- | ---------------------------------------- | ---- | --------------------------------------- |
| deviceId | string | Yes | Address of the client that receives notifications, for example, XX:XX:XX:XX:XX:XX.|
| notifyCharacteristic | [NotifyCharacteristic](#notifycharacteristic) | Yes | New characteristic value. |
**Return value**
| Type | Description |
| ------- | ------------------------ |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// Create descriptors.
let descriptors = [];
let arrayBuffer = new ArrayBuffer(8);
let descV = new Uint8Array(arrayBuffer);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002902-0000-1000-8000-00805F9B34FB', descriptorValue: arrayBuffer};
descriptors[0] = descriptor;
let arrayBufferC = new ArrayBuffer(8);
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB', characteristicValue: arrayBufferC, descriptors:descriptors};
let notifyCharacteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001821-0000-1000-8000-00805F9B34FB', characteristicValue: characteristic.characteristicValue, confirm: false};
let server = bluetooth.BLE.createGattServer();
server.notifyCharacteristicChanged('XX:XX:XX:XX:XX:XX', notifyCharacteristic);
```
### sendResponse(deprecated)
sendResponse(serverResponse: ServerResponse): boolean
Sends a response to a read or write request from the GATT client.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.sendResponse](js-apis-bluetoothManager.md#sendresponse).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------- | --------------------------------- | ---- | --------------- |
| serverResponse | [ServerResponse](#serverresponse) | Yes | Response returned by the GATT server.|
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
/* send response */
let arrayBufferCCC = new ArrayBuffer(8);
let cccValue = new Uint8Array(arrayBufferCCC);
cccValue[0] = 1123;
let serverResponse = {
"deviceId": "XX:XX:XX:XX:XX:XX",
"transId": 0,
"status": 0,
"offset": 0,
"value": arrayBufferCCC,
};
let gattServer = bluetooth.BLE.createGattServer();
let ret = gattServer.sendResponse(serverResponse);
if (ret) {
console.log('bluetooth sendResponse successfully');
} else {
console.log('bluetooth sendResponse failed');
}
```
### on('characteristicRead')(deprecated)
on(type: "characteristicRead", callback: Callback<CharacteristicReadReq>): void
Subscribes to the characteristic read request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('characteristicRead')](js-apis-bluetoothManager.md#oncharacteristicread).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ------------------------------------- |
| type | string | Yes | Event type. The value **characteristicRead** indicates a characteristic read request event.|
| callback | Callback<[CharacteristicReadReq](#characteristicreadreq)> | Yes | Callback invoked to return a characteristic read request event from the GATT client. |
**Return value**
No value is returned.
**Example**
```js
let arrayBufferCCC = new ArrayBuffer(8);
let cccValue = new Uint8Array(arrayBufferCCC);
cccValue[0] = 1123;
function ReadCharacteristicReq(CharacteristicReadReq) {
let deviceId = CharacteristicReadReq.deviceId;
let transId = CharacteristicReadReq.transId;
let offset = CharacteristicReadReq.offset;
let characteristicUuid = CharacteristicReadReq.characteristicUuid;
let serverResponse = {deviceId: deviceId, transId: transId, status: 0, offset: offset, value:arrayBufferCCC};
let ret = gattServer.sendResponse(serverResponse);
if (ret) {
console.log('bluetooth sendResponse successfully');
} else {
console.log('bluetooth sendResponse failed');
}
}
let gattServer = bluetooth.BLE.createGattServer();
gattServer.on("characteristicRead", ReadCharacteristicReq);
```
### off('characteristicRead')(deprecated)
off(type: "characteristicRead", callback?: Callback<CharacteristicReadReq>): void
Unsubscribes from the characteristic read request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.off('characteristicRead')](js-apis-bluetoothManager.md#offcharacteristicread).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **characteristicRead** indicates a characteristic read request event. |
| callback | Callback<[CharacteristicReadReq](#characteristicreadreq)> | No | Callback for the characteristic read request event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
gattServer.off("characteristicRead");
```
### on('characteristicWrite')(deprecated)
on(type: "characteristicWrite", callback: Callback<CharacteristicWriteReq>): void
Subscribes to the characteristic write request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('characteristicWrite')](js-apis-bluetoothManager.md#oncharacteristicwrite).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | -------------------------------------- |
| type | string | Yes | Event type. The value **characteristicWrite** indicates a characteristic write request event.|
| callback | Callback<[CharacteristicWriteReq](#characteristicwritereq)> | Yes | Callback invoked to return a characteristic write request from the GATT client. |
**Return value**
No value is returned.
**Example**
```js
let arrayBufferCCC = new ArrayBuffer(8);
let cccValue = new Uint8Array(arrayBufferCCC);
function WriteCharacteristicReq(CharacteristicWriteReq) {
let deviceId = CharacteristicWriteReq.deviceId;
let transId = CharacteristicWriteReq.transId;
let offset = CharacteristicWriteReq.offset;
let isPrep = CharacteristicWriteReq.isPrep;
let needRsp = CharacteristicWriteReq.needRsp;
let value = new Uint8Array(CharacteristicWriteReq.value);
let characteristicUuid = CharacteristicWriteReq.characteristicUuid;
cccValue[0] = value[0];
let serverResponse = {deviceId: deviceId, transId: transId, status: 0, offset: offset, value:arrayBufferCCC};
let ret = gattServer.sendResponse(serverResponse);
if (ret) {
console.log('bluetooth sendResponse successfully');
} else {
console.log('bluetooth sendResponse failed');
}
}
let gattServer = bluetooth.BLE.createGattServer();
gattServer.on("characteristicWrite", WriteCharacteristicReq);
```
### off('characteristicWrite')(deprecated)
off(type: "characteristicWrite", callback?: Callback<CharacteristicWriteReq>): void
Unsubscribes from the characteristic write request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.off('characteristicWrite')](js-apis-bluetoothManager.md#offcharacteristicwrite).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **characteristicWrite** indicates a characteristic write request event. |
| callback | Callback<[CharacteristicWriteReq](#characteristicwritereq)> | No | Callback for the characteristic write request event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
gattServer.off("characteristicWrite");
```
### on('descriptorRead')(deprecated)
on(type: "descriptorRead", callback: Callback<DescriptorReadReq>): void
Subscribes to the descriptor read request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('descriptorRead')](js-apis-bluetoothManager.md#ondescriptorread).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | --------------------------------- |
| type | string | Yes | Event type. The value **descriptorRead** indicates a descriptor read request event.|
| callback | Callback<[DescriptorReadReq](#descriptorreadreq)> | Yes | Callback invoked to return a descriptor read request event from the GATT client. |
**Return value**
No value is returned.
**Example**
```js
let arrayBufferDesc = new ArrayBuffer(8);
let descValue = new Uint8Array(arrayBufferDesc);
descValue[0] = 1101;
function ReadDescriptorReq(DescriptorReadReq) {
let deviceId = DescriptorReadReq.deviceId;
let transId = DescriptorReadReq.transId;
let offset = DescriptorReadReq.offset;
let descriptorUuid = DescriptorReadReq.descriptorUuid;
let serverResponse = {deviceId: deviceId, transId: transId, status: 0, offset: offset, value:arrayBufferDesc};
let ret = gattServer.sendResponse(serverResponse);
if (ret) {
console.log('bluetooth sendResponse successfully');
} else {
console.log('bluetooth sendResponse failed');
}
}
let gattServer = bluetooth.BLE.createGattServer();
gattServer.on("descriptorRead", ReadDescriptorReq);
```
### off('descriptorRead')(deprecated)
off(type: "descriptorRead", callback?: Callback<DescriptorReadReq>): void
Unsubscribes from the descriptor read request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.off('descriptorRead')](js-apis-bluetoothManager.md#offdescriptorread).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **descriptorRead** indicates a descriptor read request event. |
| callback | Callback<[DescriptorReadReq](#descriptorreadreq)> | No | Callback for the descriptor read request event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
gattServer.off("descriptorRead");
```
### on('descriptorWrite')(deprecated)
on(type: "descriptorWrite", callback: Callback<DescriptorWriteReq>): void
Subscribes to the descriptor write request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('descriptorWrite')](js-apis-bluetoothManager.md#ondescriptorwrite).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------- |
| type | string | Yes | Event type. The value **descriptorWrite** indicates a descriptor write request event.|
| callback | Callback<[DescriptorWriteReq](#descriptorwritereq)> | Yes | Callback invoked to return a descriptor write request from the GATT client. |
**Return value**
No value is returned.
**Example**
```js
let arrayBufferDesc = new ArrayBuffer(8);
let descValue = new Uint8Array(arrayBufferDesc);
function WriteDescriptorReq(DescriptorWriteReq) {
let deviceId = DescriptorWriteReq.deviceId;
let transId = DescriptorWriteReq.transId;
let offset = DescriptorWriteReq.offset;
let isPrep = DescriptorWriteReq.isPrep;
let needRsp = DescriptorWriteReq.needRsp;
let value = new Uint8Array(DescriptorWriteReq.value);
let descriptorUuid = DescriptorWriteReq.descriptorUuid;
descValue[0] = value[0];
let serverResponse = {deviceId: deviceId, transId: transId, status: 0, offset: offset, value:arrayBufferDesc};
let ret = gattServer.sendResponse(serverResponse);
if (ret) {
console.log('bluetooth sendResponse successfully');
} else {
console.log('bluetooth sendResponse failed');
}
}
let gattServer = bluetooth.BLE.createGattServer();
gattServer.on("descriptorRead", WriteDescriptorReq);
```
### off('descriptorWrite')(deprecated)
off(type: "descriptorWrite", callback?: Callback<DescriptorWriteReq>): void
Unsubscribes from the descriptor write request events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.off('descriptorWrite')](js-apis-bluetoothManager.md#offdescriptorwrite).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **descriptorWrite** indicates a descriptor write request event. |
| callback | Callback<[DescriptorWriteReq](#descriptorwritereq)> | No | Callback for the descriptor write request event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
gattServer.off("descriptorWrite");
```
### on('connectStateChange')(deprecated)
on(type: "connectStateChange", callback: Callback<BLEConnectChangedState>): void
Subscribes to the BLE connection state change events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.on('connectStateChange')](js-apis-bluetoothManager.md#onconnectstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectStateChange** indicates a BLE connection state change event.|
| callback | Callback<[BLEConnectChangedState](#bleconnectchangedstate)> | Yes | Callback invoked to return the BLE connection state. |
**Return value**
No value is returned.
**Example**
```js
function Connected(BLEConnectChangedState) {
let deviceId = BLEConnectChangedState.deviceId;
let status = BLEConnectChangedState.state;
}
let gattServer = bluetooth.BLE.createGattServer();
gattServer.on("connectStateChange", Connected);
```
### off('connectStateChange')(deprecated)
off(type: "connectStateChange", callback?: Callback<BLEConnectChangedState>): void
Unsubscribes from the BLE connection state change events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattServer.off('connectStateChange')](js-apis-bluetoothManager.md#offconnectstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **connectStateChange** indicates a BLE connection state change event.|
| callback | Callback<[BLEConnectChangedState](#bleconnectchangedstate)> | No | Callback for the BLE connection state change event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let gattServer = bluetooth.BLE.createGattServer();
gattServer.off("connectStateChange");
```
## GattClientDevice
Implements the GATT client. Before using a method of this class, you must create a **GattClientDevice** instance using the **createGattClientDevice(deviceId: string)** method.
### connect(deprecated)
connect(): boolean
Initiates a connection to the remote BLE device.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.connect](js-apis-bluetoothManager.md#connect-3).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | ------------------------- |
| boolean | Returns **true** if the connection is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let ret = device.connect();
```
### disconnect(deprecated)
disconnect(): boolean
Disconnects from the remote BLE device.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.disconnect](js-apis-bluetoothManager.md#disconnect-4).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | ---------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let ret = device.disconnect();
```
### close(deprecated)
close(): boolean
Closes this GATT client to unregister it from the protocol stack. After this method is called, this [GattClientDevice](#gattclientdevice) instance cannot be used.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.close](js-apis-bluetoothManager.md#close-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ------- | -------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let ret = device.close();
```
### getServices(deprecated)
getServices(callback: AsyncCallback<Array<GattService>>): void
Obtains all services of the remote BLE device. This API uses an asynchronous callback to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getServices](js-apis-bluetoothManager.md#getservices).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ------------------------ |
| callback | AsyncCallback<Array<[GattService](#gattservice)>> | Yes | Callback invoked to return the services obtained.|
**Return value**
No value is returned.
**Example**
```js
// Callback
function getServices(code, gattServices) {
if (code.code == 0) {
let services = gattServices;
console.log('bluetooth code is ' + code.code);
console.log("bluetooth services size is ", services.length);
for (let i = 0; i < services.length; i++) {
console.log('bluetooth serviceUuid is ' + services[i].serviceUuid);
}
}
}
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.connect();
device.getServices(getServices);
```
### getServices(deprecated)
getServices(): Promise<Array<GattService>>
Obtains all services of the remote BLE device. This API uses a promise to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getServices](js-apis-bluetoothManager.md#getservices-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| ---------------------------------------- | --------------------------- |
| Promise<Array<[GattService](#gattservice)>> | Promise used to return the services obtained.|
**Example**
```js
// Promise
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.connect();
device.getServices().then(result => {
console.info("getServices successfully:" + JSON.stringify(result));
});
```
### readCharacteristicValue(deprecated)
readCharacteristicValue(characteristic: BLECharacteristic, callback: AsyncCallback<BLECharacteristic>): void
Reads the characteristic value of the specific service of the remote BLE device. This API uses an asynchronous callback to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.readCharacteristicValue](js-apis-bluetoothManager.md#readcharacteristicvalue).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------- | ---------------------------------------- | ---- | ----------------------- |
| characteristic | [BLECharacteristic](#blecharacteristic) | Yes | Characteristic value to read. |
| callback | AsyncCallback<[BLECharacteristic](#blecharacteristic)> | Yes | Callback invoked to return the characteristic value read.|
**Return value**
No value is returned.
**Example**
```js
function readCcc(code, BLECharacteristic) {
if (code.code != 0) {
return;
}
console.log('bluetooth characteristic uuid: ' + BLECharacteristic.characteristicUuid);
let value = new Uint8Array(BLECharacteristic.characteristicValue);
console.log('bluetooth characteristic value: ' + value[0] +','+ value[1]+','+ value[2]+','+ value[3]);
}
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let descriptors = [];
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
descriptors[0] = descriptor;
let bufferCCC = new ArrayBuffer(8);
let cccV = new Uint8Array(bufferCCC);
cccV[0] = 1;
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
characteristicValue: bufferCCC, descriptors:descriptors};
device.readCharacteristicValue(characteristic, readCcc);
```
### readCharacteristicValue(deprecated)
readCharacteristicValue(characteristic: BLECharacteristic): Promise<BLECharacteristic>
Reads the characteristic value of the specific service of the remote BLE device. This API uses a promise to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.readCharacteristicValue](js-apis-bluetoothManager.md#readcharacteristicvalue-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------- | --------------------------------------- | ---- | -------- |
| characteristic | [BLECharacteristic](#blecharacteristic) | Yes | Characteristic value to read.|
**Return value**
| Type | Description |
| ---------------------------------------- | -------------------------- |
| Promise<[BLECharacteristic](#blecharacteristic)> | Promise used to return the characteristic value read.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let descriptors = [];
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
descriptors[0] = descriptor;
let bufferCCC = new ArrayBuffer(8);
let cccV = new Uint8Array(bufferCCC);
cccV[0] = 1;
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
characteristicValue: bufferCCC, descriptors:descriptors};
device.readCharacteristicValue(characteristic);
```
### readDescriptorValue(deprecated)
readDescriptorValue(descriptor: BLEDescriptor, callback: AsyncCallback<BLEDescriptor>): void
Reads the descriptor contained in the specific characteristic of the remote BLE device. This API uses an asynchronous callback to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.readDescriptorValue](js-apis-bluetoothManager.md#readdescriptorvalue).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ---------- | ---------------------------------------- | ---- | ----------------------- |
| descriptor | [BLEDescriptor](#bledescriptor) | Yes | Descriptor to read. |
| callback | AsyncCallback<[BLEDescriptor](#bledescriptor)> | Yes | Callback invoked to return the descriptor read.|
**Return value**
No value is returned.
**Example**
```js
function readDesc(code, BLEDescriptor) {
if (code.code != 0) {
return;
}
console.log('bluetooth descriptor uuid: ' + BLEDescriptor.descriptorUuid);
let value = new Uint8Array(BLEDescriptor.descriptorValue);
console.log('bluetooth descriptor value: ' + value[0] +','+ value[1]+','+ value[2]+','+ value[3]);
}
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
device.readDescriptorValue(descriptor, readDesc);
```
### readDescriptorValue(deprecated)
readDescriptorValue(descriptor: BLEDescriptor): Promise<BLEDescriptor>
Reads the descriptor contained in the specific characteristic of the remote BLE device. This API uses a promise to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.readDescriptorValue](js-apis-bluetoothManager.md#readdescriptorvalue-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ---------- | ------------------------------- | ---- | -------- |
| descriptor | [BLEDescriptor](#bledescriptor) | Yes | Descriptor to read.|
**Return value**
| Type | Description |
| ---------------------------------------- | -------------------------- |
| Promise<[BLEDescriptor](#bledescriptor)> | Promise used to return the descriptor read.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
device.readDescriptorValue(descriptor);
```
### writeCharacteristicValue(deprecated)
writeCharacteristicValue(characteristic: BLECharacteristic): boolean
Writes a characteristic value to the remote BLE device.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.writeCharacteristicValue](js-apis-bluetoothManager.md#writecharacteristicvalue).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------- | --------------------------------------- | ---- | ------------------- |
| characteristic | [BLECharacteristic](#blecharacteristic) | Yes | Binary value and other parameters of the BLE device characteristic.|
**Return value**
| Type | Description |
| ------- | --------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let descriptors = [];
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
descriptors[0] = descriptor;
let bufferCCC = new ArrayBuffer(8);
let cccV = new Uint8Array(bufferCCC);
cccV[0] = 1;
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
characteristicValue: bufferCCC, descriptors:descriptors};
let retWriteCcc = device.writeCharacteristicValue(characteristic);
if (retWriteCcc) {
console.log('write characteristic successfully');
} else {
console.log('write characteristic failed');
}
```
### writeDescriptorValue(deprecated)
writeDescriptorValue(descriptor: BLEDescriptor): boolean
Writes binary data to the specific descriptor of the remote BLE device.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.writeDescriptorValue](js-apis-bluetoothManager.md#writedescriptorvalue).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ---------- | ------------------------------- | ---- | ------------------ |
| descriptor | [BLEDescriptor](#bledescriptor) | Yes | Binary value and other parameters of the BLE device descriptor.|
**Return value**
| Type | Description |
| ------- | --------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
let bufferDesc = new ArrayBuffer(8);
let descV = new Uint8Array(bufferDesc);
descV[0] = 22;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002903-0000-1000-8000-00805F9B34FB', descriptorValue: bufferDesc};
let retWriteDesc = device.writeDescriptorValue(descriptor);
if (retWriteDesc) {
console.log('bluetooth write descriptor successfully');
} else {
console.log('bluetooth write descriptor failed');
}
```
### setBLEMtuSize(deprecated)
setBLEMtuSize(mtu: number): boolean
Sets the maximum transmission unit (MTU) that can be transmitted between the GATT client and its remote BLE device. This API can be used only after a connection is set up by calling [connect](#connect).
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.setBLEMtuSize](js-apis-bluetoothManager.md#setblemtusize).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| ---- | ------ | ---- | -------------- |
| mtu | number | Yes | MTU to set, which ranges from 22 to 512 bytes.|
**Return value**
| Type | Description |
| ------- | ---------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.setBLEMtuSize(128);
```
### setNotifyCharacteristicChanged(deprecated)
setNotifyCharacteristicChanged(characteristic: BLECharacteristic, enable: boolean): boolean
Sets the function of notifying the GATT client when the characteristic value of the remote BLE device changes.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.setNotifyCharacteristicChanged](js-apis-bluetoothManager.md#setnotifycharacteristicchanged).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------------- | --------------------------------------- | ---- | ----------------------------- |
| characteristic | [BLECharacteristic](#blecharacteristic) | Yes | BLE characteristic to listen for. |
| enable | boolean | Yes | Whether to enable the notify function. The value **true** means to enable the notify function, and the value **false** means the opposite.|
**Return value**
| Type | Description |
| ------- | ------------------------- |
| boolean | Returns **true** if the operation is successful; returns **false** otherwise.|
**Example**
```js
// Create descriptors.
let descriptors = [];
let arrayBuffer = new ArrayBuffer(8);
let descV = new Uint8Array(arrayBuffer);
descV[0] = 11;
let descriptor = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB',
descriptorUuid: '00002902-0000-1000-8000-00805F9B34FB', descriptorValue: arrayBuffer};
descriptors[0] = descriptor;
let arrayBufferC = new ArrayBuffer(8);
let characteristic = {serviceUuid: '00001810-0000-1000-8000-00805F9B34FB',
characteristicUuid: '00001820-0000-1000-8000-00805F9B34FB', characteristicValue: arrayBufferC, descriptors:descriptors};
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.setNotifyCharacteristicChanged(characteristic, false);
```
### on('BLECharacteristicChange')(deprecated)
on(type: "BLECharacteristicChange", callback: Callback<BLECharacteristic>): void
Subscribes to the BLE characteristic change events. The client can receive a notification from the server only after the **setNotifyCharacteristicChanged** method is called.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.on('BLECharacteristicChange')](js-apis-bluetoothManager.md#onblecharacteristicchange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **BLECharacteristicChange** indicates a characteristic value change event.|
| callback | Callback<[BLECharacteristic](#blecharacteristic)> | Yes | Callback invoked to return the characteristic value changes. |
**Return value**
No value is returned.
**Example**
```js
function CharacteristicChange(CharacteristicChangeReq) {
let serviceUuid = CharacteristicChangeReq.serviceUuid;
let characteristicUuid = CharacteristicChangeReq.characteristicUuid;
let value = new Uint8Array(CharacteristicChangeReq.characteristicValue);
}
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.on('BLECharacteristicChange', CharacteristicChange);
```
### off('BLECharacteristicChange')(deprecated)
off(type: "BLECharacteristicChange", callback?: Callback<BLECharacteristic>): void
Unsubscribes from the BLE characteristic change events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.off('BLECharacteristicChange')](js-apis-bluetoothManager.md#offblecharacteristicchange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **BLECharacteristicChange** indicates a characteristic value change event.|
| callback | Callback<[BLECharacteristic](#blecharacteristic)> | No | Callback for the characteristic value change event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.off('BLECharacteristicChange');
```
### on('BLEConnectionStateChange')(deprecated)
on(type: "BLEConnectionStateChange", callback: Callback<BLEConnectChangedState>): void
Subscribes to the BLE connection state change events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.on('BLEConnectionStateChange')](js-apis-bluetoothManager.md#onbleconnectionstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **BLEConnectionStateChange** indicates a BLE connection state change event.|
| callback | Callback<[BLEConnectChangedState](#bleconnectchangedstate)> | Yes | Callback invoked to return the BLE connection state. |
**Return value**
No value is returned.
**Example**
```js
function ConnectStateChanged(state) {
console.log('bluetooth connect state changed');
let connectState = state.state;
}
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.on('BLEConnectionStateChange', ConnectStateChanged);
```
### off('BLEConnectionStateChange')(deprecated)
off(type: "BLEConnectionStateChange", callback?: Callback<BLEConnectChangedState>): void
Unsubscribes from the BLE connection state change events.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.off('BLEConnectionStateChange')](js-apis-bluetoothManager.md#offbleconnectionstatechange).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | ---------------------------------------- | ---- | ---------------------------------------- |
| type | string | Yes | Event type. The value **BLEConnectionStateChange** indicates a BLE connection state change event.|
| callback | Callback<[BLEConnectChangedState](#bleconnectchangedstate)> | No | Callback for the BLE connection state change event. If this parameter is not set, this method unsubscribes from all callbacks corresponding to **type**.|
**Return value**
No value is returned.
**Example**
```js
let device = bluetooth.BLE.createGattClientDevice('XX:XX:XX:XX:XX:XX');
device.off('BLEConnectionStateChange');
```
### getDeviceName(deprecated)
getDeviceName(callback: AsyncCallback<string>): void
Obtains the name of the remote BLE device. This API uses an asynchronous callback to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getDeviceName](js-apis-bluetoothManager.md#getdevicename).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | --------------------------- | ---- | ------------------------------- |
| callback | AsyncCallback<string> | Yes | Callback invoked to return the remote BLE device name obtained.|
**Return value**
No value is returned.
**Example**
```js
// callback
let gattClient = bluetooth.BLE.createGattClientDevice("XX:XX:XX:XX:XX:XX");
let deviceName = gattClient.getDeviceName((err, data)=> {
console.info('device name err ' + JSON.stringify(err));
console.info('device name' + JSON.stringify(data));
})
```
### getDeviceName(deprecated)
getDeviceName(): Promise<string>
Obtains the name of the remote BLE device. This API uses a promise to return the result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getDeviceName](js-apis-bluetoothManager.md#getdevicename-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| --------------------- | ---------------------------------- |
| Promise<string> | Promise used to return the remote BLE device name.|
**Example**
```js
// promise
let gattClient = bluetooth.BLE.createGattClientDevice("XX:XX:XX:XX:XX:XX");
let ret = device.connect();
let deviceName = gattClient.getDeviceName().then((data) => {
console.info('device name' + JSON.stringify(data));
})
```
### getRssiValue(deprecated)
getRssiValue(callback: AsyncCallback<number>): void
Obtains the received signal strength indication (RSSI) of the remote BLE device. This API uses an asynchronous callback to return the result. It can be used only after a connection is set up by calling [connect](#connect).
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getRssiValue](js-apis-bluetoothManager.md#getrssivalue).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Parameters**
| Name | Type | Mandatory | Description |
| -------- | --------------------------- | ---- | ------------------------------ |
| callback | AsyncCallback<number> | Yes | Callback invoked to return the RSSI, in dBm.|
**Return value**
No value is returned.
**Example**
```js
// callback
let gattClient = bluetooth.BLE.createGattClientDevice("XX:XX:XX:XX:XX:XX");
let ret = device.connect();
let rssi = gattClient.getRssiValue((err, data)=> {
console.info('rssi err ' + JSON.stringify(err));
console.info('rssi value' + JSON.stringify(data));
})
```
### getRssiValue(deprecated)
getRssiValue(): Promise<number>
Obtains the RSSI of the remote BLE device. This API uses a promise to return the result. It can be used only after a connection is set up by calling [connect](#connect).
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattClientDevice.getRssiValue](js-apis-bluetoothManager.md#getrssivalue-1).
**Required permissions**: ohos.permission.USE_BLUETOOTH
**System capability**: SystemCapability.Communication.Bluetooth.Core
**Return value**
| Type | Description |
| --------------------- | --------------------------------- |
| Promise<number> | Promise used to return the RSSI, in dBm.|
**Example**
```js
// promise
let gattClient = bluetooth.BLE.createGattClientDevice("XX:XX:XX:XX:XX:XX");
let rssi = gattClient.getRssiValue().then((data) => {
console.info('rssi' + JSON.stringify(data));
})
```
## ScanMode8+(deprecated)
Enumerates the scan modes.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanMode](js-apis-bluetoothManager.md#scanmode).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ---------------------------------------- | ---- | --------------- |
| SCAN_MODE_NONE | 0 | No scan mode. |
| SCAN_MODE_CONNECTABLE | 1 | Connectable mode. |
| SCAN_MODE_GENERAL_DISCOVERABLE | 2 | General discoverable mode. |
| SCAN_MODE_LIMITED_DISCOVERABLE | 3 | Limited discoverable mode. |
| SCAN_MODE_CONNECTABLE_GENERAL_DISCOVERABLE | 4 | General connectable and discoverable mode.|
| SCAN_MODE_CONNECTABLE_LIMITED_DISCOVERABLE | 5 | Limited connectable and discoverable mode.|
## BondState8+(deprecated)
Enumerates the pairing states.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.BondState](js-apis-bluetoothManager.md#bondstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ------------------ | ---- | ------ |
| BOND_STATE_INVALID | 0 | Invalid pairing.|
| BOND_STATE_BONDING | 1 | Pairing. |
| BOND_STATE_BONDED | 2 | Paired. |
## SppOption8+(deprecated)
Defines the SPP configuration parameters.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.SppOption](js-apis-bluetoothManager.md#sppoption).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------ | ------------------- | ---- | ---- | ----------- |
| uuid | string | Yes | Yes | UUID of the SPP.|
| secure | boolean | Yes | Yes | Whether it is a secure channel. |
| type | [SppType](#spptype) | Yes | Yes | Type of the SPP link. |
## SppType8+(deprecated)
Enumerates the SPP link types.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.SppType](js-apis-bluetoothManager.md#spptype).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ---------- | ---- | ------------- |
| SPP_RFCOMM | 0 | Radio frequency communication (RFCOMM) link type.|
## GattService(deprecated)
Defines the GATT service API parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.GattService](js-apis-bluetoothManager.md#gattservice).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| --------------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| serviceUuid | string | Yes | Yes | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
| isPrimary | boolean | Yes | Yes | Whether the service is a primary service. The value **true** means a primary service. |
| characteristics | Array<[BLECharacteristic](#blecharacteristic)> | Yes | Yes | List of characteristics of the service. |
| includeServices | Array<[GattService](#gattservice)> | Yes | Yes | Services on which the service depends. |
## BLECharacteristic(deprecated)
Defines the characteristic API parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLECharacteristic](js-apis-bluetoothManager.md#blecharacteristic).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------- | ---------------------------------------- | ---- | ---- | ---------------------------------------- |
| serviceUuid | string | Yes | Yes | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | Yes | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| characteristicValue | ArrayBuffer | Yes | Yes | Binary value of the characteristic. |
| descriptors | Array<[BLEDescriptor](#bledescriptor)> | Yes | Yes | List of descriptors of the characteristic. |
## BLEDescriptor(deprecated)
Defines the descriptor API parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLEDescriptor](js-apis-bluetoothManager.md#bledescriptor).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------ | ----------- | ---- | ---- | ---------------------------------------- |
| serviceUuid | string | Yes | Yes | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | Yes | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| descriptorUuid | string | Yes | Yes | UUID of the descriptor, for example, **00002902-0000-1000-8000-00805f9b34fb**.|
| descriptorValue | ArrayBuffer | Yes | Yes | Binary value of the descriptor. |
## NotifyCharacteristic(deprecated)
Defines the parameters in the notifications sent when the server characteristic value changes.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.NotifyCharacteristic](js-apis-bluetoothManager.md#notifycharacteristic).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------- | ----------- | ---- | ---- | ---------------------------------------- |
| serviceUuid | string | Yes | Yes | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | Yes | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| characteristicValue | ArrayBuffer | Yes | Yes | Binary value of the characteristic. |
| confirm | boolean | Yes | Yes | Whether the notification needs to be confirmed by the remote end. For a notification, set it to **true**. In this case, the remote end must confirm the receipt of the notification. For an indication, set it to **false**. In this case, the remote end does not need to confirm the receipt of the notification.|
## CharacteristicReadReq(deprecated)
Defines the parameters of the **CharacteristicReadReq** event received by the server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.CharacteristicReadRequest](js-apis-bluetoothManager.md#characteristicreadrequest).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------ | ------ | ---- | ---- | ---------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device that sends the **CharacteristicReadReq** event, for example, XX:XX:XX:XX:XX:XX.|
| transId | number | Yes | No | Transmission ID of the read request. The response returned by the server must use the same transmission ID. |
| offset | number | Yes | No | Position from which the characteristic value is read. For example, **k** means to read from the kth byte. The response returned by the server must use the same offset.|
| characteristicUuid | string | Yes | No | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| serviceUuid | string | Yes | No | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
## CharacteristicWriteReq(deprecated)
Defines the parameters of the **CharacteristicWriteReq** event received by the server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.CharacteristicWriteRequest](js-apis-bluetoothManager.md#characteristicwriterequest).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------ | ------ | ---- | ---- | ---------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device that sends the **CharacteristicWriteReq** event, for example, XX:XX:XX:XX:XX:XX.|
| transId | number | Yes | No | Transmission ID of the write request. The response returned by the server must use the same transmission ID. |
| offset | number | Yes | No | Start position for writing the characteristic value. For example, **k** means to write from the kth byte. The response returned by the server must use the same offset.|
| descriptorUuid | string | Yes | No | UUID of the descriptor, for example, **00002902-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | No | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| serviceUuid | string | Yes | No | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
## DescriptorReadReq(deprecated)
Defines the parameters of the **DescriptorReadReq** event received by the server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.DescriptorReadRequest](js-apis-bluetoothManager.md#descriptorreadrequest).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------ | ------ | ---- | ---- | ---------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device that sends a **DescriptorReadReq** event, for example, XX:XX:XX:XX:XX:XX.|
| transId | number | Yes | No | Transmission ID of the read request. The response returned by the server must use the same transmission ID. |
| offset | number | Yes | No | Position from which the descriptor is read. For example, **k** means to read from the kth byte. The response returned by the server must use the same offset.|
| descriptorUuid | string | Yes | No | UUID of the descriptor, for example, **00002902-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | No | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| serviceUuid | string | Yes | No | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
## DescriptorWriteReq(deprecated)
Defines the parameters of the **DescriptorWriteReq** event received by the server.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.DescriptorWriteRequest](js-apis-bluetoothManager.md#descriptorwriterequest).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------------ | ----------- | ---- | ---- | ---------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device that sends a **DescriptorWriteReq** event, for example, XX:XX:XX:XX:XX:XX.|
| transId | number | Yes | No | Transmission ID of the write request. The response returned by the server must use the same transmission ID. |
| offset | number | Yes | No | Start position for writing the descriptor. For example, **k** means to write from the kth byte. The response returned by the server must use the same offset.|
| isPrep | boolean | Yes | No | Whether the write request is executed immediately. |
| needRsp | boolean | Yes | No | Whether to send a response to the GATT client. |
| value | ArrayBuffer | Yes | No | Binary value of the descriptor to write. |
| descriptorUuid | string | Yes | No | UUID of the descriptor, for example, **00002902-0000-1000-8000-00805f9b34fb**.|
| characteristicUuid | string | Yes | No | UUID of the characteristic, for example, **00002a11-0000-1000-8000-00805f9b34fb**.|
| serviceUuid | string | Yes | No | UUID of the service, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
## ServerResponse(deprecated)
Defines the parameters of the server's response to the GATT client's read/write request.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ServerResponse](js-apis-bluetoothManager.md#serverresponse).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| -------- | ----------- | ---- | ---- | -------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device, for example, XX:XX:XX:XX:XX:XX. |
| transId | number | Yes | No | Transmission ID of the request. The value must be the same as the ID carried in the read/write request received. |
| status | number | Yes | No | Response state. Set this parameter to **0**, which indicates a normal response. |
| offset | number | Yes | No | Start read/write position. The value must be the same as the offset carried in the read/write request.|
| value | ArrayBuffer | Yes | No | Binary data in the response. |
## BLEConnectChangedState(deprecated)
Defines the parameters of **BLEConnectChangedState**.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BLEConnectChangedState](js-apis-bluetoothManager.md#bleconnectchangedstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable| Writable| Description |
| -------- | ------------------------------------------------- | ---- | ---- | --------------------------------------------- |
| deviceId | string | Yes | No | Address of the remote device, for example, XX:XX:XX:XX:XX:XX.|
| state | [ProfileConnectionState](#profileconnectionstate) | Yes | Yes | BLE connection state. |
## ProfileConnectionState(deprecated)
Enumerates the profile connection states.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ProfileConnectionState](js-apis-bluetoothManager.md#profileconnectionstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ------------------- | ---- | -------------- |
| STATE_DISCONNECTED | 0 | Disconnected. |
| STATE_CONNECTING | 1 | Connecting.|
| STATE_CONNECTED | 2 | Connected. |
| STATE_DISCONNECTING | 3 | Disconnecting.|
## ScanFilter(deprecated)
Defines the scan filter parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanFilter](js-apis-bluetoothManager.md#scanfilter).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable| Writable| Description |
| ---------------------------------------- | ----------- | ---- | ---- | ------------------------------------------------------------ |
| deviceId | string | Yes | Yes | Address of the BLE device to filter, for example, XX:XX:XX:XX:XX:XX. |
| name | string | Yes | Yes | Name of the BLE device to filter. |
| serviceUuid | string | Yes | Yes | Service UUID of the device to filter, for example, **00001888-0000-1000-8000-00805f9b34fb**.|
## ScanOptions(deprecated)
Defines the scan configuration parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanOptions](js-apis-bluetoothManager.md#scanoptions).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| --------- | ----------------------- | ---- | ---- | -------------------------------------- |
| interval | number | Yes | Yes | Delay in reporting the scan result. The default value is **0**. |
| dutyMode | [ScanDuty](#scanduty) | Yes | Yes | Scan duty. The default value is **SCAN_MODE_LOW_POWER**. |
| matchMode | [MatchMode](#matchmode) | Yes | Yes | Hardware filtering match mode. The default value is **MATCH_MODE_AGGRESSIVE**.|
## ScanDuty(deprecated)
Enumerates the scan duty options.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanDuty](js-apis-bluetoothManager.md#scanduty).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| --------------------- | ---- | ------------ |
| SCAN_MODE_LOW_POWER | 0 | Low-power mode, which is the default value.|
| SCAN_MODE_BALANCED | 1 | Balanced mode. |
| SCAN_MODE_LOW_LATENCY | 2 | Low-latency mode. |
## MatchMode(deprecated)
Enumerates the hardware match modes of BLE scan filters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.MatchMode](js-apis-bluetoothManager.md#matchmode).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| --------------------- | ---- | ---------------------------------------- |
| MATCH_MODE_AGGRESSIVE | 1 | Hardware reports the scan result with a lower threshold of signal strength and few number of matches in a duration. This is the default value.|
| MATCH_MODE_STICKY | 2 | Hardware reports the scan result with a higher threshold of signal strength and sightings. |
## ScanResult(deprecated)
Defines the scan result.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ScanResult](js-apis-bluetoothManager.md#scanresult).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| -------- | ----------- | ---- | ---- | ---------------------------------- |
| deviceId | string | Yes | No | Address of the scanned device, for example, XX:XX:XX:XX:XX:XX.|
| rssi | number | Yes | No | RSSI of the device. |
| data | ArrayBuffer | Yes | No | Advertisement packets sent by the device. |
## BluetoothState(deprecated)
Enumerates the Bluetooth states.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.BluetoothState](js-apis-bluetoothManager.md#bluetoothstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| --------------------- | ---- | ------------------ |
| STATE_OFF | 0 | Bluetooth is turned off. |
| STATE_TURNING_ON | 1 | Bluetooth is being turned on. |
| STATE_ON | 2 | Bluetooth is turned on. |
| STATE_TURNING_OFF | 3 | Bluetooth is being turned off. |
| STATE_BLE_TURNING_ON | 4 | The LE-only mode is being turned on for Bluetooth.|
| STATE_BLE_ON | 5 | Bluetooth is in LE-only mode. |
| STATE_BLE_TURNING_OFF | 6 | The LE-only mode is being turned off for Bluetooth.|
## AdvertiseSetting(deprecated)
Defines the BLE advertising parameters.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.AdvertiseSetting](js-apis-bluetoothManager.md#advertisesetting).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ----------- | ------- | ---- | ---- | ---------------------------------------- |
| interval | number | Yes | Yes | Interval for BLE advertising. The minimum value is **32** slots (20 ms). The maximum value is **16384** slots. The default value is **1600** slots (1s).|
| txPower | number | Yes | Yes | Transmit power, in dBm. The value range is -127 to 1. The default value is **-7**. |
| connectable | boolean | Yes | Yes | Whether the advertisement is connectable. The default value is **true**. |
## AdvertiseData(deprecated)
Defines the content of a BLE advertisement packet.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.AdvertiseData](js-apis-bluetoothManager.md#advertisedata).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| --------------- | ---------------------------------------- | ---- | ---- | --------------------------- |
| serviceUuids | Array<string> | Yes | Yes | List of service UUIDs to broadcast.|
| manufactureData | Array<[ManufactureData](#manufacturedata)> | Yes | Yes | List of manufacturers to broadcast. |
| serviceData | Array<[ServiceData](#servicedata)> | Yes | Yes | List of service data to broadcast. |
## ManufactureData(deprecated)
Defines the content of a BLE advertisement packet.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ManufactureData](js-apis-bluetoothManager.md#manufacturedata).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ---------------- | ------------------- | ---- | ---- | ------------------ |
| manufactureId | number | Yes | Yes | Manufacturer ID allocated by the Bluetooth SIG.|
| manufactureValue | ArrayBuffer | Yes | Yes | Manufacturer data. |
## ServiceData(deprecated)
Defines the service data contained in an advertisement packet.
> **NOTE**
> This API is supported since API version 7 and deprecated since API version 9. You are advised to use [bluetoothManager.ServiceData](js-apis-bluetoothManager.md#servicedata).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| ------------ | ----------- | ---- | ---- | ---------- |
| serviceUuid | string | Yes | Yes | Service UUID.|
| serviceValue | ArrayBuffer | Yes | Yes | Service data. |
## PinRequiredParam8+(deprecated)
Defines the pairing request parameters.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.PinRequiredParam](js-apis-bluetoothManager.md#pinrequiredparam).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| -------- | ------ | ---- | ---- | ----------- |
| deviceId | string | Yes | No | ID of the device to pair.|
| pinCode | string | Yes | No | Key for the device pairing. |
## BondStateParam8+(deprecated)
Defines the pairing state parameters.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.BondStateParam](js-apis-bluetoothManager.md#bondstateparam).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| -------- | ------ | ---- | ---- | ----------- |
| deviceId | string | Yes | No | ID of the device to pair.|
| state | BondState | Yes | No | State of the device.|
## StateChangeParam8+(deprecated)
Defines the profile state change parameters.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.StateChangeParam](js-apis-bluetoothManager.md#statechangeparam).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable| Writable| Description |
| -------- | ------------------------------------------------- | ---- | ---- | ------------------------------- |
| deviceId | string | Yes | No | Address of a Bluetooth device. |
| state | [ProfileConnectionState](#profileconnectionstate) | Yes | No | Profile connection state of the device.|
## DeviceClass8+(deprecated)
Defines the class of a Bluetooth device.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.DeviceClass](js-apis-bluetoothManager.md#deviceclass).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Type | Readable | Writable | Description |
| --------------- | ----------------------------------- | ---- | ---- | ---------------- |
| majorClass | [MajorClass](#majorclass) | Yes | No | Major classes of Bluetooth devices. |
| majorMinorClass | [MajorMinorClass](#majorminorclass) | Yes | No | Major and minor classes of Bluetooth devices.|
| classOfDevice | number | Yes | No | Class of the device. |
## MajorClass8+(deprecated)
Enumerates the major classes of Bluetooth devices.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.MajorClass](js-apis-bluetoothManager.md#majorclass).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ------------------- | ------ | ---------- |
| MAJOR_MISC | 0x0000 | Miscellaneous device. |
| MAJOR_COMPUTER | 0x0100 | Computer. |
| MAJOR_PHONE | 0x0200 | Mobile phone. |
| MAJOR_NETWORKING | 0x0300 | Network device. |
| MAJOR_AUDIO_VIDEO | 0x0400 | Audio or video device.|
| MAJOR_PERIPHERAL | 0x0500 | Peripheral device. |
| MAJOR_IMAGING | 0x0600 | Imaging device. |
| MAJOR_WEARABLE | 0x0700 | Wearable device. |
| MAJOR_TOY | 0x0800 | Toy. |
| MAJOR_HEALTH | 0x0900 | Health device. |
| MAJOR_UNCATEGORIZED | 0x1F00 | Unclassified device. |
## MajorMinorClass8+(deprecated)
Enumerates the major and minor classes of Bluetooth devices.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.MajorMinorClass](js-apis-bluetoothManager.md#majorminorclass).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ---------------------------------------- | ------ | --------------- |
| COMPUTER_UNCATEGORIZED | 0x0100 | Unclassified computer. |
| COMPUTER_DESKTOP | 0x0104 | Desktop computer. |
| COMPUTER_SERVER | 0x0108 | Server. |
| COMPUTER_LAPTOP | 0x010C | Laptop. |
| COMPUTER_HANDHELD_PC_PDA | 0x0110 | Hand-held computer. |
| COMPUTER_PALM_SIZE_PC_PDA | 0x0114 | Palmtop computer. |
| COMPUTER_WEARABLE | 0x0118 | Wearable computer. |
| COMPUTER_TABLET | 0x011C | Tablet. |
| PHONE_UNCATEGORIZED | 0x0200 | Unclassified mobile phone. |
| PHONE_CELLULAR | 0x0204 | Portable phone. |
| PHONE_CORDLESS | 0x0208 | Cordless phone. |
| PHONE_SMART | 0x020C | Smartphone. |
| PHONE_MODEM_OR_GATEWAY | 0x0210 | Modem or gateway phone.|
| PHONE_ISDN | 0x0214 | ISDN phone. |
| NETWORK_FULLY_AVAILABLE | 0x0300 | Device with network fully available. |
| NETWORK_1_TO_17_UTILIZED | 0x0320 | Device used on network 1 to 17. |
| NETWORK_17_TO_33_UTILIZED | 0x0340 | Device used on network 17 to 33. |
| NETWORK_33_TO_50_UTILIZED | 0x0360 | Device used on network 33 to 50. |
| NETWORK_60_TO_67_UTILIZED | 0x0380 | Device used on network 60 to 67. |
| NETWORK_67_TO_83_UTILIZED | 0x03A0 | Device used on network 67 to 83. |
| NETWORK_83_TO_99_UTILIZED | 0x03C0 | Device used on network 83 to 99. |
| NETWORK_NO_SERVICE | 0x03E0 | Device without network service |
| AUDIO_VIDEO_UNCATEGORIZED | 0x0400 | Unclassified audio or video device. |
| AUDIO_VIDEO_WEARABLE_HEADSET | 0x0404 | Wearable audio or video headset. |
| AUDIO_VIDEO_HANDSFREE | 0x0408 | Hands-free audio or video device. |
| AUDIO_VIDEO_MICROPHONE | 0x0410 | Audio or video microphone. |
| AUDIO_VIDEO_LOUDSPEAKER | 0x0414 | Audio or video loudspeaker. |
| AUDIO_VIDEO_HEADPHONES | 0x0418 | Audio or video headphones. |
| AUDIO_VIDEO_PORTABLE_AUDIO | 0x041C | Portable audio or video device. |
| AUDIO_VIDEO_CAR_AUDIO | 0x0420 | In-vehicle audio or video device. |
| AUDIO_VIDEO_SET_TOP_BOX | 0x0424 | Audio or video STB device. |
| AUDIO_VIDEO_HIFI_AUDIO | 0x0428 | High-fidelity speaker device. |
| AUDIO_VIDEO_VCR | 0x042C | Video cassette recording (VCR) device. |
| AUDIO_VIDEO_VIDEO_CAMERA | 0x0430 | Camera. |
| AUDIO_VIDEO_CAMCORDER | 0x0434 | Camcorder |
| AUDIO_VIDEO_VIDEO_MONITOR | 0x0438 | Audio or video monitor. |
| AUDIO_VIDEO_VIDEO_DISPLAY_AND_LOUDSPEAKER | 0x043C | Video display or loudspeaker. |
| AUDIO_VIDEO_VIDEO_CONFERENCING | 0x0440 | Video conferencing device. |
| AUDIO_VIDEO_VIDEO_GAMING_TOY | 0x0448 | Audio or video gaming toy. |
| PERIPHERAL_NON_KEYBOARD_NON_POINTING | 0x0500 | Non-keyboard or non-pointing peripheral device. |
| PERIPHERAL_KEYBOARD | 0x0540 | Keyboard device. |
| PERIPHERAL_POINTING_DEVICE | 0x0580 | Pointing peripheral device. |
| PERIPHERAL_KEYBOARD_POINTING | 0x05C0 | Keyboard pointing device. |
| PERIPHERAL_UNCATEGORIZED | 0x0500 | Unclassified peripheral device. |
| PERIPHERAL_JOYSTICK | 0x0504 | Peripheral joystick. |
| PERIPHERAL_GAMEPAD | 0x0508 | Peripheral game pad |
| PERIPHERAL_REMOTE_CONTROL | 0x05C0 | Peripheral remote control device |
| PERIPHERAL_SENSING_DEVICE | 0x0510 | Peripheral sensing device. |
| PERIPHERAL_DIGITIZER_TABLET | 0x0514 | Peripheral digitizer tablet.|
| PERIPHERAL_CARD_READER | 0x0518 | Peripheral card reader. |
| PERIPHERAL_DIGITAL_PEN | 0x051C | Peripheral digital pen. |
| PERIPHERAL_SCANNER_RFID | 0x0520 | Peripheral RFID scanner. |
| PERIPHERAL_GESTURAL_INPUT | 0x0522 | Gesture input device. |
| IMAGING_UNCATEGORIZED | 0x0600 | Unclassified imaging device. |
| IMAGING_DISPLAY | 0x0610 | Imaging display device. |
| IMAGING_CAMERA | 0x0620 | Imaging camera device. |
| IMAGING_SCANNER | 0x0640 | Imaging scanner. |
| IMAGING_PRINTER | 0x0680 | Imaging printer. |
| WEARABLE_UNCATEGORIZED | 0x0700 | Unclassified wearable device. |
| WEARABLE_WRIST_WATCH | 0x0704 | Smart watch. |
| WEARABLE_PAGER | 0x0708 | Wearable pager. |
| WEARABLE_JACKET | 0x070C | Smart jacket. |
| WEARABLE_HELMET | 0x0710 | Wearable helmet. |
| WEARABLE_GLASSES | 0x0714 | Wearable glasses. |
| TOY_UNCATEGORIZED | 0x0800 | Unclassified toy. |
| TOY_ROBOT | 0x0804 | Toy robot. |
| TOY_VEHICLE | 0x0808 | Toy vehicle. |
| TOY_DOLL_ACTION_FIGURE | 0x080C | Humanoid toy doll. |
| TOY_CONTROLLER | 0x0810 | Toy controller. |
| TOY_GAME | 0x0814 | Toy gaming device. |
| HEALTH_UNCATEGORIZED | 0x0900 | Unclassified health devices. |
| HEALTH_BLOOD_PRESSURE | 0x0904 | Blood pressure device. |
| HEALTH_THERMOMETER | 0x0908 | Thermometer |
| HEALTH_WEIGHING | 0x090C | Body scale. |
| HEALTH_GLUCOSE | 0x0910 | Blood glucose monitor. |
| HEALTH_PULSE_OXIMETER | 0x0914 | Pulse oximeter. |
| HEALTH_PULSE_RATE | 0x0918 | Heart rate monitor. |
| HEALTH_DATA_DISPLAY | 0x091C | Health data display. |
| HEALTH_STEP_COUNTER | 0x0920 | Step counter. |
| HEALTH_BODY_COMPOSITION_ANALYZER | 0x0924 | Body composition analyzer. |
| HEALTH_PEAK_FLOW_MOITOR | 0x0928 | Hygrometer. |
| HEALTH_MEDICATION_MONITOR | 0x092C | Medication monitor. |
| HEALTH_KNEE_PROSTHESIS | 0x0930 | Prosthetic knee. |
| HEALTH_ANKLE_PROSTHESIS | 0x0934 | Prosthetic ankle. |
| HEALTH_GENERIC_HEALTH_MANAGER | 0x0938 | Generic health management device. |
| HEALTH_PERSONAL_MOBILITY_DEVICE | 0x093C | Personal mobility device. |
## PlayingState8+(deprecated)
Enumerates the A2DP playing states.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.PlayingState](js-apis-bluetoothManager.md#playingstate).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| ----------------- | ------ | ------- |
| STATE_NOT_PLAYING | 0x0000 | Not playing. |
| STATE_PLAYING | 0x0001 | Playing.|
## ProfileId8+(deprecated)
Enumerates the Bluetooth profiles. API version 9 is added with **PROFILE_HID_HOST** and **PROFILE_PAN_NETWORK**.
> **NOTE**
> This API is supported since API version 8 and deprecated since API version 9. You are advised to use [bluetoothManager.ProfileId](js-apis-bluetoothManager.md#profileid).
**System capability**: SystemCapability.Communication.Bluetooth.Core
| Name | Value | Description |
| -------------------------------- | ------ | --------------- |
| PROFILE_A2DP_SOURCE | 1 | A2DP profile.|
| PROFILE_HANDS_FREE_AUDIO_GATEWAY | 4 | HFP profile. |