The Philio 3-in-1 Multisensor integrates (1)Door/Window Sensor (2)Illumination Sensor (3)Temperature Sensor together to satisfy picky users who want to have multi-functions, small and beautiful devices but don’t want it to be unexpected. The Smart temperature sensor can be used as a security device or a home automation sensor. When the Smart temperature sensor cooperates with security appliances, the Door/Window sensor and PIR sensor act as an alarm detector. Or, when the sensor works as a home automation device, it can transmit the value of illumination and the temperature to the controller. The temperature sensor can also detect the environment temperature to adjust the heater or cooler to achieve a preset temperature or detect an abnormal environment temperature (like a freeze sensor or fire sensor) to send a warning message.