Hint: If you are connecting to a Bluetooth serial board then try using the well-known SPP UUID 00001101-0000-1000-8000-00805F9B34FB. However if you are connecting to an Android peer then please generate your own unique UUID.
安卓手机与蓝牙模块设置唯一UUID：00001101-0000-1000-8000-00805F9B34FB
其他可参考：手机蓝牙各类服务对应的UUID