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The GHF420AIO and comes in 2 current versions, 25A and 35A. It is F405 based AIO (all in one) FC that runs on 2S to 6S. It is a 20mmx20mm (whoop size) mounting pattern.

The GHF420AIO uses the BetaflightF4 Target. Flash Rotorflight using this target and select 'Load Custom Defaults' before applying the remapping files shown below. There are two options for this board, GHF420AIO(a).config or GHF420AIO(b).config.

Download the file below and Load config file to configure the servos and motors for option (a).

GHF420AIO(a) config file

Download the file below and Load config file to configure the servos and motors for option (b).

GHF420AIO(b) config file

The GHF420AIO uses the Betaflight FPVM-BETAFLIGHTF4 custom defaults file. Flash this target using the Rotorflight flasher and "load custom defaults". After reconnecting go to the CLI and load the desired config file to configure your hardware (e.g. Servo pins, motor pins, timers, DMA etc).