FOSCAM C2M - integration recommendation

Hi, I’ve got myself a FOSCAM C2M and I would like to use the person detection signal inside Openhab. I did try Ipcamera:foscam and Ipcamera:ONVIF as well as the http binding, but so far wasn’t able to get it working as my items always show NULL in Ipcamera.
Is there anyone using this camera in OH4 and willing to share their knowledge on how to get the person detection information?