We present a unified library for MQ sensors, this library allows to read MQ signals easily from Arduino, Genuino, ESP8266, ESP-32 boards whose references are MQ2, MQ3, MQ4, MQ5, MQ6, MQ7, MQ8, MQ9, ...

How to Use the ADC121C_MQ7 Arduino Library The ADC121C_MQ7 has a number of settings, which can be configured based on user requirements. 1.Automatic Conversion mode: When these bits are set to zeros, ...

When the PIR sensor was tested a voltage of 0 V was measured on the digital pin 2 of the Arduino when no motion is detected and a voltage of 3.25 V when motion is detected. The MQ7 sensor gave a ...