Build Your Own Universal Zigbee Logic Sensor - Gadget-Freakz.com
ZigBee Wifi 24G MmWave Radar Human Presence Motion Sensor With Luminosity/Distance Detection 5/110/220V Tuya Smart Life Home DIY - AliExpress
SONOFF itaed Zigbee Bridge Pro Gateway Smart Home Wifi Wireless Remote DIY Timer | eBay
Gadget-freakz - Thanks to Antenne519, we now know how to modify a Xiaomi door/contact sensor and make for example a water leakage sensor, or connect something else to it. https://gadget-freakz.com/build-your-own-universal- zigbee-logic-sensor-by ...
Amazon.com: OUVOPO Zigbee Motion Sensor (2-Pack),Requires zigbee hub, configurable DIY Portable Presence Detector Compatible with Home Assistant,Hubitat and Alexa : Everything Else
DIYRuZRT Zigbee 3.0 firmware with external sensor support for Sonoff BASICZBR3 - Domoticz