Just getting into this and am trying to convert my son’s Storm 240x racing drone that came with a CC3D FC to one that can support simple RTH so that he (well we!) can play a little more adventurously. Swapped the FC to an Omnibus F4V5, upgraded the Rx to 7 chan to get a RTH switch & installed iNav FW. Got it all working with the SBUS Rx on UART6. Added a M8N GPS on TX3/RX3 and got it working but I’m not sure where the SDA/SCL from the GPS mag goes as these connections seem to be on the same TX3/RX3 pins. I tried shifting the GPS to TX1/RX1 pins but iNav just rejects the selection of GPS as sensor on UART1 after reboot. Any idea what I am doing wrong? Is UART1 being used by another function?
The pre-arm compass calibrated light is green. Does this mean that the board has its own compass and perhaps I don’t need the GPS one for the basic RTH I need?