IoT Based Air Quality Monitoring And Air Purifier System
Keywords:
IoT, Air Quality Monitoring, MQ135 Sensor, Raspberry Pi Pico W, Air Purifier, ThingSpeakAbstract
Air pollution has become a serious environmental and health concern worldwide, especially in urban and industrial regions. This project presents an IoT-based air quality monitoring and air purifier system designed to detect harmful gases and improve indoor air conditions. The system uses a Raspberry Pi Pico W microcontroller with built-in Wi-Fi for real-time monitoring and cloud connectivity. Sensors such as MQ135, MQ7, MQ2, and DHT11 are used to measure gas concentration, temperature, and humidity. When pollutant levels exceed a predefined threshold, the system automatically activates a purifier using UV LEDs and a fan. Data is displayed on an OLED screen and uploaded to the cloud for remote monitoring via ThingSpeak. It provides real-time alerts and ensures better air quality management.
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