Hallo

I got some older SkyRC BLheli 12A ESC (shuold be oneshot compatable) that I used in my build with Omnibus F4.

Some strange things are happening, when connecting with betaflight and using oneshot 125 or oneshot 42, I can only have the ESC beep when I hit save and reboot and then the engines start spinning 100 % immediatly (except one motor with a soldering issue I believe).

Tryed to connect in BLheli config, can connect but no reading.

Any idea what I need to do?

Samuel

Do they work using standard PWM while other settings are the same? If that works then it probably means those ESC doesn't support those protocols.
Maybe try to update the ESC firmware too.