Is it possible to combine this AIO whoop board with the external 4-in-1 esc below it? Why? I blew the esc on the whoop board and happen to have a 4-in-1 laying around, and figured I'd try salvaging the FC.

You could try remapping the motor pin of the broken ESC to a spare pad (maybe LED or spare UART) and send the signal to a single ESC. If you want to rewire all 4 ESCs, not sure there would be enough pads to remap to, but you can try.

https://oscarliang.com/betaflight-resource-remapping/

Possible.. Yes. Easily done.. No.

You have to trace where the 4 motor signals are on the FC. Or micro solder directly to the MCU pins to the corresponding output. Either way, it is not easy.

(14-Apr-2023, 10:16 PM)mstc Wrote: You could try remapping the motor pin of the broken ESC to a spare pad (maybe LED or spare UART)  and send the signal to a single ESC. If you  want to rewire all 4 ESCs, not sure there would be enough pads to remap to, but you can try.

https://oscarliang.com/betaflight-resource-remapping/

Thanks for the suggestion, but wouldn't just remapping (and wiring) a single motor to the 4-in-1 throw-off or create a sort of imbalance and in turn wreak havoc on the gyro (pids)?

(14-Apr-2023, 11:02 PM)voodoo614 Wrote: Possible.. Yes. Easily done.. No.

You have to trace where the 4 motor signals are on the FC. Or micro solder directly to the MCU pins to the corresponding output. Either way, it is not easy.

So if I can locate the (MCU) pins, and solder them to the corresponding 4-in-1 esc output, then this will definitely work?

(15-Apr-2023, 01:33 AM)theon_Jules Wrote: Thanks for the suggestion, but wouldn't just remapping (and wiring) a single motor to the 4-in-1 throw-off or create a sort of imbalance and in turn wreak havoc on the gyro (pids)?

People have run mismatched single ESC's before, this is the same idea, just doesn't look that way due to everything being integrated. it should work fine

(14-Apr-2023, 11:02 PM)voodoo614 Wrote: Possible.. Yes. Easily done.. No.

You have to trace where the 4 motor signals are on the FC. Or micro solder directly to the MCU pins to the corresponding output. Either way, it is not easy.

So it's an STM32F411 chip....Is there a generic site where I can obtain the mapping, or is that information proprietary to the manufacturer (GEPRC)?

(15-Apr-2023, 01:39 AM)matt0725 Wrote: People have run mismatched single ESC's before, this is the same idea, just doesn't look that way due to everything being integrated. it should work fine

Thanks. I'd rather keep in clean by wiring all 4 motors to the FC, using Voodoo's suggestion, but if that turns out to be too difficult, then I'll go with your suggestion.

(14-Apr-2023, 11:02 PM)voodoo614 Wrote: Possible.. Yes. Easily done.. No.

You have to trace where the 4 motor signals are on the FC. Or micro solder directly to the MCU pins to the corresponding output. Either way, it is not easy.

I didn't quite understand the term "micro solder" until I looked at the chip.....I don't have the tools or the expertise to solder such tiny pins, so this option is out.

next to the "mission impossible" on the mcu, there would be a mix in mount diameter between esc and aio... another reason to spent at least 20bucks for a single fc :-)

(14-Apr-2023, 10:16 PM)mstc Wrote: You could try remapping the motor pin of the broken ESC to a spare pad (maybe LED or spare UART)  and send the signal to a single ESC. If you  want to rewire all 4 ESCs, not sure there would be enough pads to remap to, but you can try.

https://oscarliang.com/betaflight-resource-remapping/

If I do the remapping for the single motor, I'm a little stomped on how to power the 4-in-1 and the FC concurrently. Any suggestions?

(15-Apr-2023, 01:59 AM)theon_Jules Wrote: I didn't quite understand the term "micro solder" until I looked at the chip.....I don't have the tools or the expertise to solder such tiny pins, so this option is out.

They are tiny pin. Mission impossible. If you still interested, I would look for a component they might connect to. Here are the pins you would be interested in.

MOTOR1_PIN B4
MOTOR2_PIN B5
MOTOR3_PIN B6
MOTOR4_PIN B7

(15-Apr-2023, 06:45 AM)voodoo614 Wrote: They are tiny pin. Mission impossible. If you still interested, I would look for a component they might connect to. Here are the pins you would be interested in.

MOTOR1_PIN           B4
MOTOR2_PIN           B5
MOTOR3_PIN           B6
MOTOR4_PIN           B7

I'd do this if I had the tools and skill set, but I don't have either when it comes to soldering. Many thanks all the same!

(15-Apr-2023, 04:28 AM)theon_Jules Wrote: If I do the remapping for the single motor, I'm a little stomped on how to power the 4-in-1 and the FC concurrently. Any suggestions?

You would run a wire to bridge the battery pads of the two boards (+ to + and -  to -). I would run battery plug to the AIO first  and then to the ESC. AIOs have smaller solder pads, so it might be tight to fit two wires (especially that GEPRC board the two pads are very close together, I had one short out when it was bumped), you could try one on top and other on the bottom. Otherwise running the battery plug to the ESC first and then to the AIO should also work.

(15-Apr-2023, 02:37 PM)mstc Wrote: You would run a wire to bridge the battery pads of the two boards (+ to + and -  to -). I would run battery plug to the AIO first  and then to the ESC. AIOs have smaller solder pads, so it might be tight to fit two wires (especially that GEPRC board the two pads are very close together, I had one short out when it was bumped), you could try one on top and other on the bottom. Otherwise running the battery plug to the ESC first and then to the AIO should also work.

Thank you!