I've been messing around with MQTT, InfluxDB, and Grafana with a @Raspberry_Pi CM4 as the broker/server. Node Red makes it easy to set it all up
Follow
Are you using the setup described by Andreas Spiess or has that been superceded by something new?
https://youtu.be/JdV4x925au0
@lePetomaneAncien @Raspberry_Pi i didn't use that, but interesting