GitHub

DHT22 - AM2302/AM2303 temperature and humidity sensor library for Arduino

This is an Arduino library for the calibrated AM2302/AM2303 digital temperature and relative humidity sensor on a DHT22 breakout PCB. According to the datasheet, the AM2302/AM2303 is a low cost ...
EDN

Arduino DHT22 (AM2302) Tutorial + Library

You can use the DHT22 (or AM2302) humidity/temperature sensor and the Arduino UNO board to read data and print it out to the serial monitor or to display it on an LCD ...
GitHub

Sistema para controlar la calidad del aire usando Arduino y los sensores MQ(2-9, y 135 ...

Alimentación externa (5v - 3A). Todos los sensores se conectan a la alimentación externa. GND del Arduino y GND de la fuente externa se conectan entre sí. IMPORTANTE: 5v (fuente de alimentación) y 5v ...
IEEE

Development of an Arduino-based CO2 Monitoring Device

Abstract: The air quality affects human health and energy. High levels of carbon dioxide in the air can cause serious ailments of a human body. Due to the increased attention to this issue, it is ...