A320 FBW overhead panel mobiflight config

Hello,

I’m trying to interface an ON/OFF switch for the EXT POWER function on the A320 FBW overhead panel in MSFS 2020 via MobiFlight and an Arduino Mega 2560. However, the only input configuration I’ve found in MobiFlight isn’t stable—it’s not a definitive "ON" command and depends on GPU availability.

I’m facing the same issue with other functions like BAT1, BAT2, FUEL < ENG1/2, CTR TK PUMP1/2, and APU START, which I’ve also interfaced using the available input configurations in MobiFlight. These don’t act as true "ON" commands but rather as toggle orders.

Does anyone have any leads or solutions to help me out? Thanks in advance! 😉

Didier