With a lot of inspiration and help from https://github.com/Apollon77/node-ph803w project I ported the basic functionallity to python with the hope and expectation to deploy it as an Home Assistant intagration without need for a docker service and MQTT. Still a lot left to do but at least it can poll the device and show values in Home Assistant. In desktop mode (running cyclic with lib/main.py) it performs a bit better.

1. Clone this repo as ph803w dir into $HA_CONFIG_DIR/custom_components/

   $ cd custom_components
   $ git clone [email protected]:dala318/ph803w.git ./ph803w
   

2. Setup $HA_CONFIG_DIR/configuration.yaml

ph803w:
  host: 192.168.1.2    # IP of your device