Long range FPV

[flyer555]

With no spare FC to try, the only other options I can think of is to either try UART1 instead, or revert to trying an SBUS connection on a UART RX pad (you would need to flash SBUS/S.Port formware to the R9 Slim+ for that).

I decided to try that by also redoing the whole process.

However, this time, when flashing the FC firmware I encountered an error: STM32 - timed out, programming: FAILED