Wall switches
Avatto ZWSM16-W1 Zigbee 1-gang in-wall switch module, with neutral
A single-channel Zigbee 3.0 relay that hides in the back-box behind the key and keeps the light on a local mesh through a Tuya Zigbee gateway, off the home Wi-Fi.
zigbee
Door/window sensors
Avatto ZDS16 Zigbee door & window contact sensor, CR2032
Stick the two halves on the door and frame: the moment the door or window opens, the ZDS16 sends a Zigbee alert to your phone.
zigbee
199MDL