2020-05-19
2880
1. First, open setting software, view the command password
2. SMS format
usr.cn#AT+command
For example: usr.cn#AT+VER
usr.cn#AT+APN
3. The AT commands :
https://www.usriot.com/download/GPRS/USR-GM3-AT-Command-Set_V1.0.2.pdf
