Unable to start ESC calibration

Hi,
I have PX4 FMU v2.x with 1.10.1 firmware. I calibrated everything except ESC calibration.
When I click Calibrate at Power>ESC PWM Calibration. It says “Transition denied: SHUTDOWN to INIT”
As I understood it means SHUTDOWN mode is activated, because no battery connected, but ESC calibration ask to dsiconnect battery from FC.

When I start FC with attached battery and usb connected and then disconnect battery it says:
Dangerously low battery! Shutting system down. System does not support shutdown".

That sounds like a firmware bug. You might want to post in a firmware forum or slack.

@elserpiente Do you meanwhile have a solution for this issue? I have the same problem.

Yes. Ive rolled back to 1.9.x firmware and everything sorted out.

Thanks for the note. I’ve created an issue: https://github.com/PX4/Firmware/issues/14273