Instructions here https://cosmostreamer.com/wiki/index.php?title=Cosmostreamer_settings#RC
Mode
Mode
UART device for SBus input. By default use /dev/ttyS0 (RX on GPIO 15)
You could enable additional UART ports in the tab "UART params"
UART device for CRSF input. By default use /dev/ttyS0 (RX on GPIO 15)
You could enable additional UART ports in the tab "UART params"
Raspberry Pi board GPIO pinout