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 control the test lamp's extin