IoT Enabled Multi-level Smart Parking System

Nowadays, modern cities face traffic congestion due to parking space constraints. Two main factors for reduced navigable space are increased vehicles on fixed space and skewed demand for on-street parking. Switching to multi-level parking system addresses land scarcity, but results in increased slot-hunt time. In this paper, an internet of things (IoT) based smart multi-level parking solution is employed using Wireless Sensor Networks (WSN). Empty parking slots in each level are tracked and allocated to users on request. The sensor node authenticates incoming vehicles and can track possible speed violation using radar sensors. The motorized lift, capable of detecting floor levels using combination of digital pressure sensor (DPS), drops vehicle to allotted slot. The parking bill is generated considering the true usage time tracked using ultrasonic sensors and accurate timers. This system utilizes ESP-NOW protocol for inter-node communication and results show its suitability in real-time system owing to no-latency communication.