CO measurement with Arduino UNO and MQ-7 sensor. Contribute to koenmestdag/arduino-mq7 development by creating an account on GitHub.

This project is an Air Pollution Monitoring System using Arduino Mega (ATMega2560) and a NodeMCU-ESP8266 WiFi Module to connect to the internet and send data to the ThingSpeak server. The system ...

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 ...