Hoymiles DTU microinverters (PV)

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As people are asking, here is what I did.
Assumption:

  • openDTU up and working and connected to your Wifi
  • MQTT broker up and running in your Wifi
  • HOme Assistant up and running (talking about 2022.10.x - might work with older versions)

  1. Setup MQTT broker in HA
    Add new MQTT integration

  2. Configure openDTU
    – Open webpage from open DTU
    – Goto inverter settings, enter serial number of your converter and give it a name (is used in the sensor name in HA)
    – Goto MQTT settings, enable MQTT, enter your MQTT broker IP address and port (1883?), enter credentials if required
    – check settings again
    – Goto MQTT settings, enable HA auto-discovery

  3. Configure HA dashboards
    – Check MQTT integration under settings - open entities and check if new entities appeared (should). New sensor entities are named “sensor.INVERTERNAME_ATTRIBUTE”
    – Add sensors to your dashboards through any visualization card you want to

  4. If sensor data disappears/expires
    – Goto MQTT settings page
    – disable “Enable expiration” (please note, that this means, the last sensor value stays. You need to monitor reachability of the converter via the according sensor)

I hope this helps…

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