@Kl

It's summer now so I will code. Why would I go outside ?
Starting with Volvo API playground 

Then small libre link app with serial number storing (you will know devices you have and how many weeks with them, and serial for faster requesting replacements)

Then I will make alternative Volvo app

I bought a polish żabka controller for very low price of 1 PLN. Its useless but I think there are possibilities like home control or mapped keys