Skip to main content
Use this API to remove a listener registered with my.onBLECharacteristicValueChange. If no callback is provided, all listeners are removed.

​
Parameters

PropertyTypeRequiredDescription
callbackFunctionNoThe specific callback to remove. If omitted, all listeners are removed.

​
Code Example

​
Remove All Listeners

my.offBLECharacteristicValueChange();

​
Remove Specific Listener

Page({
  onLoad() {
    my.onBLECharacteristicValueChange(this.handleValueChange);
  },

  handleValueChange(res) {
    console.log('Value changed:', res.value);
  },

  onUnload() {
    my.offBLECharacteristicValueChange(this.handleValueChange);
  }
});

​
Complete BLE Cleanup

function cleanupBLE() {
  my.offBLECharacteristicValueChange();
  my.offBluetoothDeviceFound();
  my.offBluetoothAdapterStateChange();
  my.disconnectBLEDevice({ deviceId: currentDeviceId });
  my.closeBluetoothAdapter();
}

my.onBLECharacteristicValueChange

Listen for value changes

my.readBLECharacteristicValue

Trigger a read on a characteristic