MC55的原理图及单片机控制(C语言)

51单片机串口通过AT指令控制GPRS发送接收短信，并显示在LCD上，包括显示和串口，AT指令的底层驱动-51 MCU GPRS AT commands via the serial port transmit and receive text messages, and displayed on the LCD, including display and serial, AT commands underlying driver

sin900a模块与51单片机连接，51单片机控制gprs模块，与服务器通信-Sin900a module and 51 single-chip connection, 51 single-chip control gprs module, and server communication