The **Sensor** module provides APIs for subscribing to and unsubscribing from sensor data, and obtaining the sensor list. It also provides common sensor algorithm APIs, for example, APIs for obtaining the altitude based on the atmospheric pressure and obtaining the device orientation based on the rotation matrix.
A sensor is a device to detect events or changes in an environment and send messages about the events or changes to another device (for example, a CPU). Generally, a sensor is composed of sensitive components and conversion components. Sensors are the cornerstone of the Internet of Things (IoT). A unified sensor management framework is required to achieve data sensing at a low latency and low power consumption, thereby keeping up with requirements of "1+8+N" products or business in the Seamless AI Life Strategy. Based on the usage, sensors are divided into the following categories:
- Motion: acceleration sensors, gyroscope sensors, gravity sensors, linear acceleration sensors, and more
- Orientation: rotation vector sensors, orientation sensors, and more
- Environment: magnetic field sensors, barometric pressure sensors, humidity sensors, and more
- Light: ambient light sensors, proximity sensors, color temperature sensors, and more
- Body: heart rate sensors, heartbeat sensors, and more
- Other: Hall effect sensors, grip detection sensors, and more
> **NOTE**
>
> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version.
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@@ -23,8 +34,8 @@ Subscribes to data changes of the acceleration sensor. If this API is called mul
Subscribes to data changes of the linear acceleration sensor. If this API is called multiple times for the same application, the last call takes effect.
This API is deprecated since API version 9. You are advised to use **Sensor.on.LINEAR_ACCELEROMETER<sup>9+</sup>** instead.
**Required permissions**: ohos.permission.ACCELEROMETER (a system permission)
Subscribes to data changes of the linear acceleration sensor. If this API is called multiple times for the same application, the last call takes effect.
**Required permissions**: ohos.permission.ACCELEROMETER (a system permission)
| type | [SensorType](#sensortype) | Yes | Type of the sensor to subscribe to, which is **SENSOR_TYPE_ID_LINEAR_ACCELEROMETER**.|
| callback | Callback<[LinearAccelerometerResponse](#linearaccelerometerresponse)> | Yes | Callback used to return the linear acceleration sensor data. The reported data type in the callback is **LinearAccelerometerResponse**.|
| options | [Options](#options) | No | Interval at which the callback is invoked to return the sensor data. The default value is 200,000,000 ns. |
| type | [SensorType](#sensortype) | Yes | Type of the sensor to subscribe to, which is **SENSOR_TYPE_ID_HEART_BEAT_RATE**. |
| callback | Callback<[HeartRateResponse](#heartrateresponse)> | Yes | One-shot callback used to return the heart rate sensor data. The reported data type in the callback is **HeartRateResponse**.|
| type | [SensorType](#sensortype) | Yes | Type of the sensor to subscribe to, which is **SENSOR_TYPE_ID_LINEAR_ACCELEROMETER**.|
| callback | Callback<[LinearAccelerometerResponse](#linearaccelerometerresponse)> | Yes | One-shot callback used to return the linear acceleration sensor data. The reported data type in the callback is **LinearAccelerometerResponse**.|
| type | [SensorType](#sensortype) | Yes | Type of the sensor to subscribe to, which is **SENSOR_TYPE_ID_HEART_BEAT_RATE**. |
| callback | Callback<[HeartRateResponse](#heartrateresponse)> | Yes | One-shot callback used to return the heart rate sensor data. The reported data type in the callback is **HeartRateResponse**.|
| type | [SensorType](#sensortype)[SensorType](#sensortype) | Yes | Type of the sensor to unsubscribe from, which is **SENSOR_TYPE_ID_HEART_BEAT_RATE**.|
| callback | Callback<[HeartRateResponse](#heartrateresponse)> | Yes | One-shot callback used to return the heart rate sensor data. The reported data type in the callback is **HeartRateResponse**.|
| type | [SensorType](#sensortype) | Yes | Type of the sensor to unsubscribe from, which is **SENSOR_TYPE_ID_LINEAR_ACCELEROMETER**.|
| callback | Callback<[LinearAccelerometerResponse](#linearaccelerometerresponse)> | Yes | Callback used to return the acceleration sensor data. The reported data type in the callback is **LinearAccelerometerResponse**.|
The **Vibrate** module provides APIs for controlling LED lights and vibrators. You can use the APIs to query the LED light list, turn on and off the LED light, query the vibrator list, query the vibrator effect, and trigger and turn off the vibrator.
Misc devices refer to LED lights and vibrators on devices. LED lights are mainly used for indication (for example, indicating the charging state) and blinking (such as tri-colored lights). Vibrators are mainly used in scenarios such as the alarm clock, power-on/off, and incoming call vibration.
> **NOTE**
> - The initial APIs of this module are supported since API version 4. Newly added APIs will be marked with a superscript to indicate their earliest API version.
> - The APIs of this module are no longer maintained since API version 8. You are advised to use [`@ohos.vibrator`](js-apis-vibrator.md) instead.
> - This module requires hardware support and can only be debugged on real devices.
The **Vibrator** module provides APIs for triggering or stopping vibration.
# Vibrator
Misc devices, including vibrators and LED lights, are used to send signals externally. You can call the APIs of this module to control the vibration of vibrators and turning-on/off of LED lights.
