www.mydigitaldiscount.com lowered prices on their Zigbee sensors again. I have a bunch of the door/windows that work great, are low profile and include temps. I just ordered a couple lamp dimmers since they have repeater functionality.
https://www.mydigitaldiscount.com/visonic-mct-340-e-wireless-door-window-temperature-sensor-2.4ghz-zigbee-now-works-natively-with-samsung-smartthings-hub/
https://www.mydigitaldiscount.com/bosch-security-motion-sensor-pir-pet-immune-for-samsung-smartthings-and-other-smart-hubs-with-zigbee-wireless/
https://www.mydigitaldiscount.com/centralite-3-home-lighting-lamp-dimmable-control-module-for-samsung-smartthings-and-other-smart-hubs-with-zigbee-wireless-model-3100/