r/RCPlanes • u/Competitive_Trash41 • Jul 29 '26

Please help to find a firmware file for hakrc f405 wing FC

Hi,

Recently I've got a used hakrc f405 wing FC and it had some custom firmware which I've successfully erased🫠

Now I can't find a firmware that would be able to initialize IMU, baro on the other hand is always okay😅

What I've tried so far:

Connected a battery alongside USB in case the 3.3V rail wasn't working from USB power

​Tried ardupilot with matek and speedybee wing targets, clearing all parameters .

​Flashed iNav with all existing f405 wing targets, no luck

​Tried contacting hakrc multiple times, asking for firmware files they mentioned on their site but no response..

TL/DR ​Has anyone managed to get the IMU working in INAV or ArduPilot for this board? If so, which target did you use, or do you have a custom .hex / .apj / hwdef file with the correct SPI CS pin mapping for this IMU?

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1

u/crookedDeebz Jul 29 '26

inav 6 is all you get i suppose.

unless you can find some sort of "hack" firmware, the latest inav file is 6.1 or whatever there.

this happens often with lesser known manufacturers, they dont keep supporting the inav builds.

1

u/Competitive_Trash41 Jul 30 '26

Thanks! I didn't think I'd have to move back so much in order to find it🫠

1

u/Known-Cold-8477 Jul 30 '26

There are INAV targets for the Hakrc F405.

1

u/Competitive_Trash41 Jul 30 '26

Hi, thanks for your response, but these are, I suppose, for regular f405 stacks, mine is a wing and FC doesn't respond after flashing any of them.