Economy version. Good for prototyping. (from Asia)
Adapter 2.0mm to 2.54mm 8pin --- 2.82 usd / 10pcs (for 5 rmfxx) link
Pin header 2.0mm 40 pin --- 0.62 usd / 10 pcslink
Pin header 2.54mm 40 pin --- 0.53usd / 5pcs link

Hello,
this is my version "Home Easy Plug-in switch (HE877)". scatch.
Arduino emulates remote control Elro AB440
AVI, thanks for the inspiration.

https://codebender.cc/sketch:92208