This board is part of the d-diot project. See the blog post or the dedicated wiki page to know more about this board.
See the latest release to download the gerber files to manufacture this board.
MySensors battery powered and 3d printable wireless doors and windows sensor. MySensors is compatible with a lot of open source home automation software like Home Assistant (which is the one included in the d-diot hub and image), OpenHAB, Domoticz, etc... See here for a complete list.
MySensors battery powered and 3d printable wireless soil moisture sensor.
The repository of the firmware associated to this board is here.