This item: BETAFPV Frsky LiteRadio 3 Remote Control Radio Transmitter with Nano Bay for External TX Module, Support FPV Simulator Configurator V2 Firmware Update Joystick Calibration for FPV Quad-Mode 2 $76.99$76.99 + BETAFPV Cetus Pro Brushless Drone with Altitude Hold Self-Protection Emergency...
With the configurator app, flashing over wifi or via Betaflight pass-through is extremely easy. The firmware has been pretty solid since RC9 at least, and now that v1.0 is out I'm at least as confident in it as I am in Crossfire (and wayyyyyy more than FRsky). ...
Arduino firmware [frser-duino.hex] (download link:https://drive.google.com/file/d/0BxZ43kLDo-GFOWJnQ19HYWVZVmc/view) Caddx Turtle firmware flash dump file [flash.hex] (download link:https://bit.ly/Goggle-Drive-Caddx-Turtle-Firmware-Dump-files) Note! It seems that the Caddx has changed...