Homey Pro and Sonoff DW2 door sensor

Hi all, I have in my hands a couple of Sonoff DW2 door sensors. I googled a little and it seems they are wi-fi devices which needs a gateway. Anyway, does any of you know if it’s possible connect those sensors to Homey Pro, without any gateway? I see there are different Sonoff apps in Homey Store, I tried them but no success. Thank you for any hint.
Bye
Francesco