This project presents an IoT-based smart dustbin using NodeMCU, MQ-135 gas sensor, ultrasonic sensors, a servo motor, and the Blynk platform. It features automatic lid operation via proximity detection and monitors fill level and gas concentration in real-time, displayed on the Blynk app. A custom PCB ensures reliable connections. If harmful gas levels are detected, the system triggers a buzzer and opens the lid for ventilation. This smart dustbin enhances hygiene and safety, demonstrating IoT's potential in improving waste management for households and public spaces Key Words: NodeMCU (ESP12E), Ultrasonic Sensor [2 units],7805 Voltage Regulator, MQ-135 Gas Sensor, Servo Motor 9g,Buzzer,DC Adapter (9 Volt),Soldering Iron, Solder Wire.
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Sandesh Ambadas More (2024) studied this question.
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