AT+HMPUB

This command is used to send MQTT data to a specific topic.

Command	Parameter	Default Parameter Processing	AT Response	Example
AT+HMPUB=qos,topic,payload_len,payload	qos: MQTT QoS (0, 1, 2)	Default value: 0	+HMPUB OK (Publishing successful)	If the hexstring mode is used, the data in bytes must be converted into the hexadecimal value before being transmitted. For example, to send bytes 0x12 0x34 to test, invoke the command AT+HMPUB=0,"test",2,1234.
	topic: specific topic.	The default value is the topic of reporting properties. You are advised to set this parameter.	+HMCON ERR: code (Publishing failed. code indicates the failure cause code.)
	len: length of the data to be sent, in bytes.	-	-
	payload: data converted to ASCII code. The maximum length is 1,024 bytes.	The maximum length is 2 KB.	-