IoTIntermediate
Air Quality Monitoring System
Multi-sensor air quality detector with cloud logging.
Estimated Total Cost
₹2,200
Required Components
NodeMCU ESP32
WiFi controller
Qty: 1
₹500
MQ135 Air Quality Sensor
Gas detection
Qty: 1
₹150
DHT22 Sensor
Temp & Humidity
Qty: 1
₹250
MQ7 CO Sensor
Carbon monoxide
Qty: 1
₹200
OLED Display 1.3 inch
Data display
Qty: 1
₹250
Buzzer Module
Alert system
Qty: 1
₹30
5V Power Supply
Power adapter
Qty: 1
₹150
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