my.offBLECharacteristicValueChange

my.offBLECharacteristicValueChange();

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

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

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

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