tags: grove_analog, io_3v3, io_5v, plat_duino, plat_pi ![](https://raw.githubusercontent.com/SeeedDocument/Grove-Piezo_Vibration_Sensor/master/img/Grove-Piezo ...

Piezoelectric sensors are great for monitoring mechanical impacts with a microcontroller. Whether you’re monitoring knocks on a door or watching a heartbeat, they are a cheap way to get the job done.