C4001 speed detection

Hi

Can someone tell me how to read speed with a C4001? I've tried everything via Python, but it only detects movement (moving/no movement)…?

I have this model:

https://www.berrybase.ch/en/detail/019234a62d0c72a09337a655c60f8f5c

Features at a glance: Detects both static and moving objects with strong anti-interference capability.

Uses FMCW modulation for distance and speed measurement.

Thanks