Building a Smart Parking IoT App

A deep dive into designing SmartPark, a real-time IoT parking management system, using Hexagonal Architecture (Ports & Adapters) instead of microservices. Architecture comparison, IoT stack choices, and why frameworks like NestJS make hexagonal natural. The Problem: 72 Hours to Detect a Dead Sensor Imagine a city with 500 parking sensors embedded in the ground. One of them dies. Nobody notices for 72 hours. Meanwhile, the dashboard shows a spot as "occupied" that's been empty for 3 days, agents