Live Data from IO-Broker to Grafana

Grafana Dashboards
1

Hello,

I’m using Grafana v11.0.0 and try getting Live-Data from IO-Broker to a Grafana Dashborads.
Data are read once a second via modbus from a Power-Meter.

I would like to get “best praktice”-tipps how to feed the Live Data from IO-Broker:

Things tried:

  1. (best solution so far):
    IO-Broker: MQTT-Server with “send only changes” un-checked
    Telegraf: Read vir MQTT → Send to Grafana via http
    About 20% CPU on a Rasberry 4 / Also Values with no updates are populated)

  2. As 1., but with Websocket from Telegraf to Grafana (could not get it working)

  3. IO-Broker: MQTT-Server as 1. but with MQTT-Client Datasource in Grafana direkt.
    Values ware only populated sporadicaly. (Played around with “retain flag” etc)

  4. IO-Broker: MQTT-Client “send only changes” checked
    Mosquito-MQTT-Broker
    Grafana-MQTT-Client
    Worked quite stable, but only did update values which changed, so the Dashboard looks “strange”

  5. as 4 but with “send only changes” un-checked
    → Creates some kind of loop and CPU is maxed out, so no updates.

Regards
Martin