• PC321-Z

    Turo Heikkinen • 11/02/2022 at 21:21 • 0 comments

    Needed a power monitor that can

    - Monitor three phase power

    - Monitor both directions, to measure sold solar energy

    - Be easily integrable to open source home systems without needing to use propietary clouds

    PC321-Z from OWON (sold also on other brands, don't know exactly which types tick these boxes).

    Ordered two units directly from OWON. Unit price about doubled from ~50 € due to shipping and taxes but still not easy to beat the price.

    Wired first to a simple AC cable, pressed the button for ~5 seconds and set Tasmota to discover Zigbee devices, was found and started to send MQTT messages with electricity stats. By default the data looks somewhat like this:

    ZbZCLRawReceived: {"0xD149":{
  "0702/4002":"0x00000000F192",
  "0702/2002":197,
  "0702/3002":2400,
  "0702/3102":1224,
  "0702/4102":"0x00000000829F",
  "0702/2102":218,
  "0702/4106":67,
  "Endpoint":1,
  "LinkQuality":14}}

     Got the API specs from OWON against NDA but is also available in the internet.