SimCom SIM7800 Series User Manual

Smart Machine Smart Decision
SIM7500_SIM7600_SIM7800 Series_MQTT_AT Command Manual 34 / 41
// Disconnect from server
AT+CMQTTDISC=0,120
OK
+CMQTTDISC: 0,0
//Release the client
AT+CMQTTREL=0
OK
//stop MQTT Service
AT+CMQTTSTOP
OK
+CMQTTSTOP: 0
3.3 Access to SSL/TLS MQTT server (only verify the server)
Following commands shows how to access to a SSL/TLS MQTT server with verifying the server. It needs to
configure the authentication mode to 1 and the right server root CA, and then it will connect to the server
successfully.
AT+CSSLCFG=”sslversion”,0,4// Set the SSL version of the first SSL context
OK
// Set the authentication mode(verify server) of the first SSL context
AT+CSSLCFG=”authmode”,0,1
OK
// Set the server root CA of the first SSL context
AT+CSSLCFG=”cacert”,0,”server_ca.pem”
OK
AT+CMQTTSTART // start MQTT service, activate PDP context
OK
+CMQTTSTART: 0
// Acquire one client which will connect to a SSL/TLS MQTT server
AT+CMQTTACCQ=0,”client test0”,1
OK
// Set the first SSL context to be used in the SSL connection
AT+CMQTTSSLCFG=0,0
OK

SimCom SIM7800 Series Specifications

General

Brand	SimCom
Model	SIM7800 Series
Category	Control Unit
Language	English