my.offBLECharacteristicValueChange

2022-07-04 03:44

Use this API to unlisten to the BLE device characteristic change event.

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

Sample Code

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Page({
  onLoad() {
    this.callback = this.callback.bind(this);
    my.onBLECharacteristicValueChange(this.callback);
  },
  onUnload() {
    my.offBLECharacteristicValueChange(this.callback);
  },
  callback(res) {
    console.log(res);
  },
})

Parameters

Property	Type	Description
deviceId	String	The Bluetooth device ID.
serviceId	String	The UUID of the service corresponding to a Bluetooth characteristic.
characteristicId	String	The Bluetooth device characteristic UUID.
value	Hex String	The latest hexadecimal value of the characteristic.

Whether to pass callback value or not

If the callback value is not passed, the callbacks of all events will be removed. The sample code is as follows:

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my.offBLECharacteristicValueChange();

If the callback value is passed, only the corresponding callback is removed. The sample code is as follows:

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my.offBLECharacteristicValueChange(this.callback);