This sensor detects changes in infrared rays such as human body movement. This type is used for security alarms and automatic lighting lights. What is GROVE System? This product has been modular to be used by simply connecting a cable to a unified external substrate with a variety of electronic components. Compared to traditional methods using breadboards and other methods primarily for learning, it can be easily and quicker without the unnecessary trouble of part implementation. While it is similar to a microcontrol-centric system such as Arduino, GROVE is not centered on a specific MCU, and is mainly modules that implement individual peripheral devices such as sensors, switches, and displays. This allows it to be applied to various systems, such as Arduino, LPCXpresso, mbed, and small Linux PCs. Bridge shields are also available for each system. Each module has basically only one part implemented and is extremely simple. The required documents and sample programs are available either included or downloaded. The connection is simply connected with cables common in all modules. Using dedicated bridge shields such as Arduino, you can add peripheral devices to suit your needs by simply combining the GROVE series modules and cables without creating a new assembly. If you use seeeduino compatible products called Arduino products in seeedstudio, you can use the Arduino assets such as sample codes. Seeeduino is compatible with mbed.