Device: HorstmannControlsLimited Thermostat
homee Version: 2.9.2 (8ff106b)
Web App Version: 2.9.2 (#05e8eca)
How is the device behaving? (Screenshot would be good 
):
This is a Horstman ASR-2W (also know as Secure SSR303).
It is a boiler receiver controller.
It is working, but the toggle (on / off) is not shown as a main device option.
I assume it’s not a bug but the device is simply not supported yet. You can find the supported devices on the homepage https://hom.ee/products. It does not mean that other devices do not work but usually you will get this error. If you want the device be supported, you need to open a request/proposal in the correct part of this board. If you get enough likes, it might get included somewhen.
