It's a simple homemade board with those specifications:
Size : 29.8 x 44.8 mm
Sensor power on/off
Optional : Flash
Optional : Atsha204a
Optional : Advanced low power management
Optional : External Battery measurement (voltage divider)
Optional : External pull-up for door switch
Some pin to add external sensors
Started with a big board and removed everything on it but what I needed the most.
I'm thinking about removing atsha, advanced power, external battery measurement because I will probably not use them. (atsha indoor is pretty much useless)
Remove Flash too, if OTA is developed for RFM69 (I may try to help with this development)
Actually connected to a raspberry 1 with MySensorsGateway + Mosquitto (Will probably move to WEMO or something else, raspberry not working well for the moment)
My controller is Home Assistant
I will not release any board/sketch before I feel the project is mature enough but...