Flywoo GOKU BS 35A ESC wont work with PWM?

This ESC is beautifully small and works fine with DSHOT control, but does not respond to PWM even after attempting ESC calibration. I need to use PWM for my application Do I need to configure its firmware somehow to respond to PWM, and if so, how?

Thanks so much for the help!

What ESC firmware does it use? Bluejay for example does not support PWM. If it’s BLHeli_S it should. Perhaps you have some leftover parameters from the Dshot configuration.

It’s BLHeli and I would have thought should autodetect. The controller is outputting PWM fine (tested with another ESC). Anyone know how I can even get into its settings and or firmware?