This Arduino sketch reads the gas concentration of CO2 and LPG (Liquified Petroleum Gas) values from two sensors, the MQ-135 and MQ-2, and then communicates the values to ROS using the following ...

This is an Arduino code that detects using MQ-135 and DHT-11 sensors the amount of carbon dioxide and water vapour in air and triggers a buzzer alarm when their concentration passes safe levels The ...

The system is composed of an Arduino Mega and four MQ gas sensors. The response of four different MQ sensors (MQ-2, MQ-3, MQ-7, and MQ-135) to different indoor and outdoor environments is analyzed.

ANAVI Gas Detector is an ESP8266 based board designed for MQ gas sensors supported by Arduino. This allows you to easily monitor air quality, or more accurately air conductivity using MQ-135 sensor as ...

ANAVi Fume Extractor comes with a fan & filter controlled by ESP8266 WiFi microcontroller, and connects to I2C sensors such has MQ-135 gas sensor.

MQ-5 Sensor Module – Parts The MQ-5 Sensor is popular among beginners since it detects combustible gases in most Arduino projects. Likewise, these are low-cost, easy-to-use sensors with a wide ...

LPG is an alternative fuel used for daily use. Due to its low cost and ease of installation. This article covers an Arduino-based gas detection system that uses an Arduino UNO R3 board and gas sensors ...