Gateway using ATmega32U4

[karlheinz2000]

Did anyone get a serial gateway with ATmega32U4 to run?
I read about some problems in the past using this chip...
I need a small board with 2 harware serials to run a serial RS485 gateway. A ProMicro board looks nice
Right now my gateway runs on a mega board, but this a little too big

[karlheinz2000]

Update:
Setup still not running as a RS485 GW
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?