Send MQTT from Perspective

3rd Party Modules
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1

I have installed an MQTT engine and an MQTT Transmission module.
Within Ignition, I am able to read MQTT topics (tags) and have enabled the Read/Write option.

Additionally, I have enabled the WRITE TO feature in the MQTT settings of the gateway. However, I am still unable to write or send MQTT commands from Ignition's perspective.

I would greatly appreciate some assistance with this issue, if there is someone that have any advice.

Thank you

2

Only SparkplugB tags can be written back.

You will have to call system.cirruslink.engine.publish() to publish the value to the MQTT engines

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3

Do you have an example ?

4

https://docs.chariot.io/display/CLD80/MQTT+Publishing+via+MQTT+Engine

5

Thank you

Will test this.
I tried before, but I could not find my TAGs\MQTT topics in the Sparkplug B from Node-red.
Not sure if I can use Mosquito MQTT server (or if I need to add some settings to allow Sparkplug B)

maybe I need to use HiveMQ to get Sparkplug B to work.

6

Hmm cant`t figure out what I am supposed to write in the script.

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system.cirruslink.engine.publish(String serverName, String mqttTopic, byte [] payload, int qos, boolean retain)

replace serverName ? or write my servername after the "ServerName" .

7

Do I also need to use tha Transmission plugin on the Gateway to send MQTT ?
And if so, do I use that Server in the script, or my default MQTT ?

https://docs.chariot.io/display/CLD80/MQTT+Transmission

I also wonder, if anyone actually send MQTT from Ignition with positive results, as I find this extremely hard to figure out.

Cheers

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