小编Smi*_*t K的帖子

我正在尝试使用 BluetoothGattCharacteristic 方法 setValue(..) 在香水分配器设备中写入十六进制值 0xFF 。我在回调方法 onCharacteristicWrite() 中获得成功状态代码 0 但设备不执行任何操作，理想情况下它应该发出香味.

下面是我写入特性的示例代码

private void writeCharacteristic(CallbackContext callbackContext, UUID serviceUUID, UUID characteristicUUID, byte[] data, int writeType) {

    boolean success = false;

    if (gatt == null) {
        callbackContext.error("BluetoothGatt is null");
        return;
    }
    BluetoothGattService service = gatt.getService(serviceUUID);
    BluetoothGattCharacteristic characteristic = findWritableCharacteristic(service, characteristicUUID, writeType);
            if (characteristic == null) {
        callbackContext.error("Characteristic " + characteristicUUID + " not found.");
    } else {
        int data2=0xFF;
        characteristic.setValue(data2, BluetoothGattCharacteristic.FORMAT_UINT16, 0);
        characteristic.setWriteType(BluetoothGattCharacteristic.WRITE_TYPE_NO_RESPONSE);
        writeCallback = callbackContext;   
        if (gatt.writeCharacteristic(characteristic)) {
            success = true; …