This is my attempt to sync typical RC flight radio and DJI FPV RC/RC2
DJI RC/RC2
AUX1: N S M 3 pos switch
AUX2: gimbal 3 pos switch
AUX3: Pause / RTH button toggle switch
AUX4: Start / Stop switch
AUX5: C1
OpenTX/EdgeTX Mapping
AUX1 should always be ARM for ELRS due to how ELRS is optimized. So to mimic behavior like the DJI, the AUX1 need to be swapped from the usual SA to another key, on Boxer I place it on SE, and SJ on my TX16S(with the button mod).
CH1-4: AETR
CH5: SE on boxer, SJ/SI on TX16S rear button
CH6: SB
CH7: SC
CH8: SD
CH9: SA
Left To Right
Left: Turtle Mode
Left-Center: Angle/Horizon/Acro 3 POS
Right-Center: NA/BEEPER MUTE /PIT MODE 3 POS
Right: Beeper+Prearm