SimCom SIM7500 Series Command Manual

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SIM7500_SIM7600_SIM7800 Series_MQTT_AT Command Manual 5 / 41
Step 9: Unsubscribe to message by AT+CMQTTUNSUB.
Step 10: Input the topic of a publish message by AT+CMQTTTOPIC.
Step 11: Input the payload of a publish message by AT+CMQTTPAYLOAD.
Step 12: Publish message by AT+CMQTTPUB.
Step 13: Disconnect from the server by AT+CMQTTDISC.
Step 13: Release the client by AT+CMQTTREL.
Step 14: Deactivate the PDP context to stop MQTT service by AT+CMQTTSTOP.
2 Description of AT Command
2.1 SSL Context Management AT (only for SSL/TLS MQTT)
2.1.1 AT+CSSLCFG Configure the SSL Context
AT+CSSLCFG Configure the SSL Context
Test Command
AT+CSSLCFG=?
Response
+CSSLCFG: "sslversion",(0-9),(0-4)
+CSSLCFG: "authmode",(0-9),(0-3)
+CSSLCFG: "ignorelocaltime",(0-9),(0,1)
+CSSLCFG: "negotiatetime",(0-9),(10-300)
+CSSLCFG: "cacert",(0-9),(5-128)
+CSSLCFG: "clientcert",(0-9),(5-128)
+CSSLCFG: "clientkey",(0-9),(5-128)
OK
Read Command
AT+CSSLCFG?
Response
+CSSLCFG:
0,<sslversion>,<authmode>,<ignoreltime>,<negotiatetime>,<
ca_file>,<clientcert_file>,<clientkey_file>
+CSSLCFG:
1,<sslversion>,<authmode>,<ignoreltime>,<negotiatetime>,<
ca_file>,<clientcert_file>,<clientkey_file>
+CSSLCFG:
2,<sslversion>,<authmode>,<ignoreltime>,<negotiatetime>,<
ca_file>,<clientcert_file>,<clientkey_file>
+CSSLCFG:
3,<sslversion>,<authmode>,<ignoreltime>,<negotiatetime>,<

SimCom SIM7500 Series Specifications

General

Brand	SimCom
Model	SIM7500 Series
Category	Control Unit
Language	English