Hey @Saarthi ,
You linked a guide written for Teltonika Networks devices, which is out of scope for the fleet management integration. This means that you can use the generic OpenRemote documentation to configure how your devices connect to OpenRemote’s MQTT broker.
If you are sending data from Flespi to OpenRemote, you can use Agents to connect OpenRemote to external services to retrieve data, or you can use the MQTT service user you created to send data to OpenRemote’s MQTT broker. I’m not familiar with Flespi’s APIs or functionality so I can’t help you much further.
Here’s the documentation for publishing attribute updates to our MQTT broker: Manager APIs | OpenRemote Documentation
And a thread that can help with formatting the messages published to the MQTT broker: Question about JSON format for MQTT ipaddress / geojson
Hope this helps!