Currently the app for the ICY thermostat is not functioning with Homey V5. I’ve contacted the developer, he’s not planning an update as he is disappointed in Athom and Homey.
Maybe ther is a developer prepared to update the app. I’m sure if I ask, the current developer will be ok with that.
I’ve had a look at the code myself, doesn’t seem to complicated, but I don’t have the knowledge to do the job.
Anyone interested? I’m prepared to contribute. And willing to help and test.