I just came across your repo and started playing with your python app. Great work! Seems to work out of the box so far.
I don’t have the skills to port your app to a homey app, but if you have your application running somewhere, you can control it and retrieve data using the HTTP request flowkaarten App voor Homey | Homey already.
For me getting the state of charge in a Homey variable and maybe control the heating from Homey is already worth a lot and this seems to work.