@les Perhaps your first guess is wrong and the Node is kicking itself off because something mismatches? I'm never used MQTT or encryption as never really saw the point with rfm69s, but it makes no sense that a neighbour would know your networkID and the Node number before and after you changed it? Did you establish communication worked on a simple serial gateway first with no encryption or is this your first attempt?

@les great! We'll, the debug flags should not help getting things to work, only provide additional information if it doesn't. All configuration flags need to be placed prior to any header include directives. Else they will have no effect. Anyway, glad it worked out in the end.

Yes D8 = pin 15 :) So any ideas on why the raspberry pi isn't sending parent information or "listening/responding" to the wemos? As a side sanity check I will try a different raspberry pi. Can someone confirm the pins on Pi2/3? Power - 1 Mosi -19 Miso -21 DIO - 22 Clk - 23 NSS - 24 GND - 25