Create an ESP32-Powered Smart Mailbox Notification System with Home Assistant

Ever missed an important piece of mail because you forgot to check your mailbox? I certainly have—more times than I’d like to admit. That’s why I built a smart mailbox notification system using an ESP32 and a simple tilt sensor. Now, I get instant alerts in Home Assistant whenever the mailbox door opens. No more guessing! In this guide, I’ll walk you through the entire process—from wiring the hardware to configuring ESPHome and setting up automations in Home Assistant.