@mfalkvidd Thx for the "quick and dirty" way. This at least is a starting point, but most things around that seem really to be hard coded (MySensorsCore.h: L77: GW Address is 0 is the point where the getNodeId() finally leads to). But if that really works there might be a way to wrap around that - but indeed this seems to be quite complicated. And indeed, you are right that having multiple nRF-GW's was possible ever since MySensors existed.

@gohan ;-) will try it.... -> Learning leasson... :-)

the C modules are for Compatibility with an older radio module, so they are a bit smaller and a slight different pinout but still the same communication

@Markus. I think that is how your original sketch works! Unless the gateway isn't functioning. You can always leave the function in both places.

@AWI So I will Keep my batterys above 2.7 Volts ..:-) So in Summary... Hope its now correct Shorting the 3V3 Connections (right site of the Picture) plus from Battery to VBAT minus to any GND Any many many thanks for your Patience !!!!

Maybe i am late, i made this box a few weeks ago: https://www.thingiverse.com/thing:2339712