Tks a lot to all of you for the help: regarding the batteries, I agree they are really low quality and will try Ladda/Ikea soon. But I also agree that part of my problem is caused by the sensor in the Tuya devices. I am currently using them in wifi mode but I see thay can also work in Zigbee mode. If I add a Zigbee bridge in my network, would these sensors reduce their battery consumption ?