DYS XS30A ESC Calibration

Hi All,

How do you calibrate DYS XS30A ESCs?

I have connected to Betaflight, set motor tab to max and plugged in the LiPo.
The ESC plays no startup or programming tunes .....
My min throttle is set to 1000 and max to 2000.

Is there another way to calibrate these ESCs?

TIA.