The Smoke Sensor Module (MQ-2) module is useful for gas leakage detection (home and industry). It is suitable for detecting H2, LPG, CH4, CO, Alcohol, Smoke or Propane. Due to its high sensitivity and fast response time, measurement can be taken as soon as possible. The sensitivity of the sensor can be adjusted by potentiometer.
This is an Analog output sensor. It needs to be connected to any one Analog socket in Grove Base Shield. The examples used in this tutorial make uses of A0 analog pin. Connect this module to the A0 port of Base Shield.