Yeah that does seem to be the case. But I have read that some were having success so I gave it a go anyways...
I can't see me having much time for a while to give this another go, so i'll probably wait until i can roll back to UI5.
@A3V such a feature would definitely make sense now that gateways can have local sensors. But no-one has added it unfortunately.
A solution could be to use the code at https://github.com/mysensors/MySensors/blob/2e00bf6a10f76d6aaa1999e12313237bc3edabd3/core/MyTransport.cpp#L446 as inspiration and do something similar at https://github.com/mysensors/MySensors/blob/2e00bf6a10f76d6aaa1999e12313237bc3edabd3/core/MyGatewayTransportEthernet.cpp#L175
@kimot No, it is an obvious mistake, I am very sorry. Maybe it is becouse the code in master branch is very old, the newest is not yet on github, but the developement branch is quite new. I am going to fix this soon.
@Westie That feature can also be used with the Arduino Nano, or any other ATmega328P-based board.
I had NRF24 + RFM69 running for a couple of days using a Nano as an Ethernet MQTT gateway and it worked fine as far as I remember.