Impressive feat of work, and i especially like this part of your post:
But the device is completely hackable so there are no limits to what you can do with it.
Id love to get my hands on one board and see where i can get with a little automation project with the geothermal heating system my house. I’ve been looking to create a board myself with rs485 (for the CM3) as the heating system is controlled by a PLC with a MODBUS, however i lack the hardware skills.
Id essentially would only need the base board (can buy and flash the module myself), how and where can i get one?