Found the problem!

Ahum........the usb adapter for the gateway didn't have enough power to setup the NRF24 radio network :confused:
When trying a better/heavier adapter for the gateway, everything worked fine!

Did change the radio channel to 124, so the garage sensors cannot connect to the house gateway.

Thanks for the help!

Hi @skywatch,

Gateway 1 has 192.168.0.120:4444
Gateway 2 has 192.168.0.119:5003

I guess both need to have a different ip and the port should not matter.