AT Commands

1. ATI: query brand, model anf firmware version;
   
2. AT+CIMI: query the number of SIM card;
3. AT+CPIN?: query the number of SIM card;
4. AT+QGPS?: query the status of GPS but it's necessary to connect GPS antenna;
5. AT+QGPSLOC?: query GPS location but it's necessary to connect GPS antenna;
6. AT+CSQ: query signal value;
7. AT+QGPS=1: send command to enable GPS because by default or powered off it's disabled;
8. AT+QGPS=0: send command to disable GPS;
9. AT+CFUN=1,1: send command to reboot the module;
10. AT+QPRTPARA=3: send command to restore it to the default factory settings;
11. AT+CGDCONT?: send command to read PDP context
12. AT+CGDCONT=<cid>[,<PDP_type>[,<APN>[,<PDP_addr>[,<data_comp>[,<head_comp>]]]]]: send command to define PDP context with APN;
    
13. AT+QPRTPARA=3: send command to restore to the default factory settings after upgrading.

NOTE: For more details, please click and download Quectel_EC25&EC21_AT_Commands_Manual_V1.3 or Quectel_EC25&EC21_GNSS_AT_Commands_Manual_V1.0.