IoT-Based Smart Waste Bin with Real-Time Fill-Level Monitoring

Abstract

Waste management is a critical component under the domain of cleanliness and hygiene, especially in urban and semi-urban areas where improper disposal and delayed collection lead to overflowing bins, unhygienic surroundings, and environmental hazards. To address these challenges, a smart waste bin system is proposed that combines IoT-based sensor technologies with real-time cloud connectivity. This smart bin leverages ultrasonic sensors to monitor fill levels, a capacitive moisture sensor to differentiate between wet and dry waste, and an Arduino Uno microcontroller for system control. The collected data is transmitted to a firebase real-time database via the ESP8266 Wi-Fi module, which also triggers instant notifications through Firebase Cloud Messaging (FCM) when bins reach critical capacity. A React.js web dashboard provides real-time visualization and alert history to municipal authorities. The system functions on a client-server model and aims to automate the waste segregation process, optimize collection schedules, and significantly reduce manual monitoring. The objective is to create a scalable, low-cost, and intelligent solution for smart city initiatives that ensures cleaner environments, improved public health, and efficient solid waste management.