EMQPUBLISH – publish data to a message topic

Publish data to a created message topic. Data is sent to your thing in the cloud.

Type	Syntax	Returned result
Test	AT+EMQPUBLISH=?	Available topic indexes, QoS values, and OK
Read	AT+EMQPUBLISH?	OK
Write	AT+EMQPUBLISH=(0-7),(0-1),	OK, ERROR, :SEND OK, or :SEND FAIL

For the Write command:

• Set the publish topic index from 0 through 7.
• Set QoS to 0 for at-most-once delivery or 1 for at-least-once delivery.
• Send an unquoted message as unmodified text.
• Limit the payload to 1000 printable characters.
• Send quoted ASCII-hex data with an even number of characters from 0-9, a-f, or A-F.
• Start quoted JSON data with { immediately after the opening quote. AnyNet SMARTconnect™ does not validate JSON.

The module returns :SEND OK when it publishes the message. For QoS 1, the broker sends a PUBACK to confirm receipt. :SEND FAIL applies only to QoS 1. If the module returns ERROR, check that EMQPUBOPEN – create a publish message topic has configured the topic and ETMSTATE – check current state has started MQTT.

Example

AT+EMQPUBLISH=1,1,"{"BatteryPower": "Low"}"
OK
:SEND OK