本例程51单片机与蓝牙模块连接,可通过蓝牙模块接收和发送字符串,从而控制测试灯的亮灭。其中使用51单片机的串行口2的工作方式1(This routine is connected to the Bluetooth module by 51 single chip microcomputer. It can receive and send the string through the Bluetooth module, so as to