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SIM7500_SIM7600_SIM7800 Series_MQTT_AT Command Manual 30 / 41
// Specify the parameter value of the PDP context corresponding to cid
AT+CGSOCKCONT=1,"IP","CMNET"
OK
AT+CGPADDR
+CGPADDR: 1,10.49.14.68 //ensure the first PDP context get a IP address
+CGPADDR: 4,0.0.0.0
OK
Note: usually CSOCKAUTH and CSOCKSETPN parameter are kept default if not care about.
3.1 Access to MQTT server not SSL/TLS
Following commands shows how to communicate with a MQTT server.
// start MQTT service, activate PDP context
AT+CMQTTSTART
OK
+CMQTTSTART: 0
// Acquire one client which will connect to a MQTT server not SSL/TLS
AT+CMQTTACCQ=0,”client test0”
OK
// Set the will topic for the CONNECT message
AT+CMQTTWILLTOPIC=0,10
>0123456789
OK
// Set the will message for the CONNECT message
AT+CMQTTWILLMSG=0,6,1
> qwerty
OK
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