The module is based on the thermistor (resistance increases with the ambient temperature changes), and sense real-time temperature of the surrounding environment. The output level is sent can be connected to an Arduino's analogue input. Example code can be found at: http://sensorkit.en.joy-it.net/index.php?title=KY-013_Temperature-Sensor_module Example video can be found here https://www.youtube.com/embed/iFE6Ae8vb-U
