@eccle said: Using MySensors I have set up a serial gateway with a NRF24l01 and a distance sensor on a pro mini both are working. I get gateway startup complete on the serial monitor. When I add a gateway in My Controller the status is down. It is Enabled, type is Serial, Network, Type is MySensors, Connection detail is Port:/dev/tty/USB0,Baud rate 115200, Driver Auto. error message unable to open. Do I have to have a specific port Thanks Hi in Linux USB-serial port will be something like /dev/ttyUSB* not /dev/tty/USB0. To know available USB-Serial port use this command ls -lh /dev/ttyUSB*