短信的发送需要GSM模块和处理器协作完成,GSM模块与ARM处理器通过串口连接,处理器向串口发送接收AT命令与

GSM模块形成通信回路。-Send text messages GSM modules and processors need to be completed in collaboration, GSM module and the ARM processor through the serial port connection, the processor to the serial port to send AT commands and GSM receiver module communication loop formation.