Introduction I needed an interposer board to easily attach NRF24L01+ and the Arduino Pro Mini into a cheap WISKA box that is IP54 proof WISKA box can be bought here in DK - But it also fits into a 40mm cable tray There is possibility to measure battery voltage My need is to use it for battery operated binaryswitch. Further it should be "easy" to also use if for my refrigerator so I should also be able to add 2 pcs DS18B20 sensors. (Note on rev 1, you must also solder 4,7kOHM res for 1wire data - I soldered a 1206 size directly between VCC and Data) and then I will use the "RAW" voltage instead of using battery (230VAC main power supply is not part of this scope)

Log: (2016-March-28) Interposer PCB have now been verified and is working as door/window sensor (2016-March-23) My home automation RPI2 have crashed a few days ago (SD card crash something after a major upgrade), so I have not been able to verify my interposer board yet...