If the repeater doesn't work, and I know you stated Zigbee but you could also use Hubduino with various temp, contact, motion sensors running on a nodemcu, wemos d1 or similar which connects to your wifi.
Download the Hubitat app
If the repeater doesn't work, and I know you stated Zigbee but you could also use Hubduino with various temp, contact, motion sensors running on a nodemcu, wemos d1 or similar which connects to your wifi.
Download the Hubitat app