mqtt2prometheus VS modbus_exporter

Depends what “hub” you use. If you have zigbee2mqtt, you can use something like https://github.com/hikhvar/mqtt2prometheus

One way is with Prometheus with push gateway and then push the data to the gateway. Other way is in the Prometheus scrape config to gather the data from the endpoints (Esps). Alternative is to push it to influx or graphite db. I for example am using MQTT topics and then translate to Prometheus/graphite/other. Here is one exporter of such that also works well https://github.com/hikhvar/mqtt2prometheus

Scraping to Prometheus and Home assistant can be done with a MQTT broker and mqtt2prometheus

Hello everyone, I am new to Prometheus and trying to understand how to scrape the MQTT metrics from a MQTT broker on a ubuntu server and send it to prometheus for monitoring. I have tried MQTT2Prometheus exporter mqtt2prometheus exporter but have some issues setting up on the ubuntu server. Can anyone guide me how to setup the exporter, it would mean a lot to me.

I've been dealing with MQTT lately. If you run into it as well maybe https://github.com/hikhvar/mqtt2prometheus can help you.

For datacenter environments, you'll also probably run into the need for the modbus_exporter to get to some physical plant stuff like generators, HVAC, etc that only speak modbus.

No, they also used Prometheus for a lot of other stuff. Mainly modbus_exporter used to monitor physical plant stuff like UPSs, generators, hvac, physical security monitors, etc.