I bought sensor here(slot for battery and battery is not included): https://botland.store/bbmagic-bluetooth-automation/15522-bbmagic-motion-wireless-pir-sensor-5904422363130.html

I found initial version of this software here: http://bbmagic.net/do-pobrania/ Refactored it to minimal code for object detection with saving output to file.

I am using this script on raspberry pi zero w

Compile by:

$ make all

Then(sudo might be needed):

$ ./bbmagic_motion_sketch