AT+HMCON

This command is used to set MQTT connection parameters.

Command	Parameter	Default Parameter Processing	AT Response	Example
AT+HMCON=bsmode,lifetime,serverip,serverport,deviceid,passwd,codec	bsmode: The value 0 indicates the non-BS mode.	Default value: 0	-	AT+HMCON=0,10,"iot-mqtts.cn-north-4.myhuaweicloud.com","8883","testID","testPasswd",0
	lifetime: MQTT heartbeat keep-alive duration. You are advised to set it to a value greater than or equal to 30.	Default value: 300	+HMCON OK (Connection successful)
	serverip: IP address of the device access server or bootstrap server.	Default value: IP address of the bootstrap server	+HMCON ERR: code (Connection failed. code indicates the failure cause code.)
	serverport: port number of the device access server or bootstrap server.	Default value: MQTTS port 8883	-
	id: device ID, which contains a maximum of 256 characters.	Obtained after a device is registered.	-
	pwd: device secret, which contains a maximum of 256 characters.	Obtained after a device is registered.	-
	codec: payload encoding mode. The value 0 indicates the original encoding mode, and the value 1 indicates the hexadecimal encoding mode.	Default value: 0	-