my.readBLECharacteristicValue

2021-07-21 11:23

Use this API to read the data of Bluetooth Low Energy (BLE) device characteristics. The returned information must be obtained by using the callback in the my.onBLECharacteristicValueChange.

Instructions:

The device characteristics must support read to use this API. See properties in my.getBLEDeviceCharacteristics for details.

Multiple parallel reading and writing calls might cause failures.

If the reading times out, the error code is 10015. However, my.onBLECharacteristicValueChange interface might return data later. Please consider how to handle this situation.

Note:
Currently simulation in IDE is not supported. Please debug in production environment.

Sample Code

copy

my.readBLECharacteristicValue({
  deviceId: deviceId,
  serviceId: serviceId,
  characteristicId: characteristicId,
  success: (res) => {
    console.log(res)
  },
  fail:(res) => {
  },
  complete: (res)=>{
  }
})

Parameters

Property	Type	Required	Description
deviceId	String	Yes	The Bluetooth device ID.
serviceId	String	Yes	The UUID of the service corresponding to a Bluetooth characteristic.
characteristicId	String	Yes	The Bluetooth characteristic UUID.
success	Function	No	The callback function for a successful API call.
fail	Function	No	The callback function for a failed API call.
complete	Function	No	The callback function used when the API call is completed. This function is always executed no matter the call succeeds or fails.

Success Callback Function

Property	Type	Description
characteristic	Object	Information of the device characteristic.

characteristic

Information of the Bluetooth device characteristic

Property	Type	Description
characteristicId	String	The Bluetooth characteristic UUID.
serviceId	String	The UUID of the service corresponding to a Bluetooth characteristic.
value	Hex String	The Bluetooth characteristic value.