一、 AT命令解释： ATcommand GPRS.rar

1、常用操作

1.1 AT

命令解释：检测Module与串口是否连通，能否接收AT命令；

命令格式：AT<CR>

命令返回：OK (与串口通信正常)（无返回，与串口通信未连通）

测试结果：AT OK

-A, AT command interpreter: 1, common operating 1.1 AT command interpreter: Detection Module and the serial port is connected, can receive AT commands　command format: AT <CR> Command returns: OK (and normal serial communication) (no return, and serial communication is not connected) test results: AT OK