diff --git a/src/platforms/app-plus/service/api/device/bluetooth.js b/src/platforms/app-plus/service/api/device/bluetooth.js
index e4b50eb18a5c9efedd083b088f5db80945db2f42..9c4fd18e08eaed3b30bceeb984aa6a452a358e08 100644
--- a/src/platforms/app-plus/service/api/device/bluetooth.js
+++ b/src/platforms/app-plus/service/api/device/bluetooth.js
@@ -139,6 +139,8 @@ export function readBLECharacteristicValue (data, callbackId) {
 }
 
 export function writeBLECharacteristicValue (data, callbackId) {
-  data.value = base64ToArrayBuffer(data.value)
+  if (typeof data.value === 'string') {
+    data.value = base64ToArrayBuffer(data.value)
+  }
   bluetoothExec('writeBLECharacteristicValue', callbackId, data)
 }