The PIR/Motion 3-in-1 Sensor is designed with three detecting sensors, PIR/Motion, temperature, and illumination 3 sensor, to detect movement within a protected area. When the detector cooperates with security appliances, the detector is acting as a security device by detecting changes in infrared radiation levels. If a person moves within or across the device’s field of vision, a trigger radio signal will be transmitted to cause full alarm conditions to frighten intruders away. Alternatively, when the detector is worked with Z-Wave Controller, the detector can be set to perform the role of a home automation device by detecting both changes in infrared radiation levels and the percentage of lux levels. Once night falls, the percentage of ambient illumination is lower than a preset value. If a person moves within or across the device’s field of vision, a trigger radio signal will be transmitted to turn connected lighting for better illumination. Whenever PIR trig, the sensor will also send temperature and illumination values. Also, the temperature will send out the value when the temperature changes.