@karlheinz2000 Sorry I missed your original post. I've used the WhiskyDelta code successfully for gateways using the 401 and 411. Glad you found it.

@karlheinz2000 sounds great that you found the bug. It's always difficult to tell if it is a HW or SW bug on MCUs. From your first description it seems like a SW one to me.

Yes, no real EERPOM, but emulation in flash. EEPROM failure was the first finding when checking for this error message. Maybe somthing else... Now complete sketch is ported from AVR ProMini to STM32 and is runnig fine :+1:

I've opened an issue for that. https://github.com/mysensors/MySensors/issues/1452 According to API payload is same on ECHO message. I feel this should be handled/fixed in lib, but I have no idea how to do... If it is not possible to fix in lib, it shall not be allowed to send message with no payload anymore, which controller has to make sure then. @rejoe2 Regarding FHEM, at the moment we should keep it as it is. No payload is not the normal use case. I flashed gateway with 2.2.0 and this fixed the problem for me.

Well... actually it would make sense as the splash screen is not a debug info :D :sweat_smile:

@karlheinz2000 a global variable should work. Quick and dirty :grimacing: Make sure to name it something unique.

With radios from ITEAD this issue is obsolete. They seem to populate original nordic chips, or even good fakes.

Update: Setup still not running as a RS485 GW :worried: No debug info coming out of serial/USB. I flashed a normal NRF serial GW -> works. I did not define "MY_GATEWAY_SERIAL" -> works as a RS485 node. Any idea why just the RS485 GW feature does not work with 32U4?