Here we are USING MQ135 TO MONITOR AIR QUALITY. ALSO, USING ESP8266 TO SEND DATA TO THINGSPEAK .

Weather station using an ATmega2560 and ESP8266 Author: Nikola Bogdanov

This channel measures Temperature and humidity with a DHT22 and PM2.5 &10 with a SDS011. All with an ESP32, an MQTT and a Node-Red server.

RetoIoT curso CIDA-Cefire

Monitoring intensitas cahaya, konsentrasi CO2 udara, suhu udara, kelembapan udara menggunakan sensor BH1750 FVI, mq135, dht22, arduino mega, nodemcu, dan Thingspeak

air quality measurements in industrial setting

My own portable particle Analyzer with ESP32

Arduino based Air Pollution Monitoring System measures carbon dioxide using an MQ135 gas sensor and carbon monoxide using an MQ7 sensor in PPM( Parts Per Million).

NodeMCU Weather Sensor Data (Inside)

WIP weather station. currently only DHT11 and MQ135.

测试人体口中呼出的硫化物浓度

Proyecto de IoT realizado para la UN: Medida de calidad del aire y ambiente con Arduino Mega y sensores DHT11 y MQ135.

College project on IoT.

Humidity and temperature monitoring using IOT

NodeMCU with MQ135, MPU6050 and SOS button.