How to identify a specific 433 device with RFXtrx?

Hi !

I’m sorry, this is probably a very simple problem but none of my searches helped me solve it!.. so I’m asking the community to help a newbie in HA.

I’m trying to add 433.92 MHz motion detection sensors. My RFXtrx is configured and seems to be working fine. The sensors were working on my previous setup in Domoticz and as I’m trying to set them up here through the auto add then the list of visible devices is huuuuuuge (> 200) and I can’t start to figure which one could be these sensors.

I gave it a shot with those that were displaying batteries info but no success…

here is the model I’m using:

I think the easiest way would be to have a “manual add” option that listens until the enroll option is activated on the device (like I did in Domoticz) but I can’t find such option in HA.

I’m sure it’s a very silly problem, but I’m still stuck with it for a week or so !

Thanks