MQTT CommandResponse Action

Publish MQTT Message based on event completely serverless via Thingsup IoT Platform.

This provides a way to publish MQTT Message based on event. Before adding MQTT CommandResponse Action, user has to define a MQTT Connection. User need to provide following parameters.

PublishTopic

• User need to provide MQTT Topic on which data will be published.

SubscribeTopic

User need to provide MQTT Topic on which data will be received.

QoS

MQTT QoS value. Default is 1.

Function

• Javascript code to build mqtt message.

• "tx_topic","rx_topic","message" and "payload" objects are available in this code, function can be used to set message body and topic from payload before sending to MQTT.

• Setting tx_topic and rx_topic here overrides already defined PublishTopic and SubscribeTopic respectively.

//Example 1

message = payload;
tx_topic = "somenewtopic"; 
rx_topic = "someothertopic";

ResponseFunction

• Javascript code to validate received message.

• "tx_topic","rx_topic","rx_message" and "tx_message" objects are available in this code, keeping rx_message non null will result in success response of action and assigning rx_message to null will result in action failure.

• This function will execute for each message till success or timeout.

// Example 1

if(rx_message.id != tx_message.id ){
rx_message = null; 
}

Timeout

Maximum time expected in milliseconds for MQTT Response. Default value is 2000. Range is 1000 to 5000.

Connection ID

User need to provide a Connection ID of MQTT connection.

Add MQTT CommandResponse Action

Please note the following points:

• "payload" object is supplied from Action Trigger like Rules, Action Command etc.