Here is my first mysensors HW that i developed and also my first post. Not all functions are tested at the moment.
I started by analyzing the current thermostat on size and function. Then i took all the info and started working with it in designspark.
My plan is to use this with Openhab
-Should be able to open/close valve in Uponor system
-Should in the future be able to open the valve from 0-100% (Think i need to change valves for this)
-Should fit in the Wirsbo thermostat mechanics
-The system shall fall back to "old thermostat" function if the home automation stops working by using the knob setting
-The system shall be built as much as possible on cheap components that could be bought on for example ebay
If only on/off function is requested then the MOC 3023 could be replaced by a a new one with zero crossing detection and then also the zero crossing detector can be omitted (IL250 in the schematic)
The HW fits in the old casing
Not all components are mounted at the moment as i have not received them yet, but the board have partial functions