This document describes an IOT-based smart city system that uses sensors and cloud computing. The system includes four main components: 1) A home automation system that allows users to control appliances via a mobile app. 2) A smart parking system that detects available spaces using IR sensors and reports status to the cloud. 3) An intelligent street light system that turns lights on and off based on sensor detections of passing vehicles. 4) A smart garbage monitoring system that measures fill levels of bins using ultrasonic sensors and reports percentages to users. The system is designed to make city management more efficient and improve services for citizens.