How to send AT commands by SMS?
2020-05-19
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
Nothing：GPRS modules are connected server setting method
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