A comprehensive smart home automation system built around an ESP32, with WiFi provisioning, Firebase Realtime Database sync, and a React Native mobile app for remote control.

Hardware

ESP32 development board driving a 12-channel relay module
GPIO pins mapped across 12 relays for appliances and lighting
BOOT button hold (5 seconds) resets WiFi credentials

Features

WiFi provisioning: configure credentials via BLE (Espressif’s ESP BLE Provisioning app), QR code, or SoftAP fallback
12 relay control: turn devices on/off from the mobile app in real time
Firebase sync: relay state, device metadata, automation schedules, and energy usage tracked in Realtime Database
Automation scheduling: time-based rules with custom on/off times and day-of-week selection
Energy tracking: per-device wattage and usage statistics (total hours, units, monthly rollups)

Mobile app

Built with Expo and React Native. Provides real-time device control, automation scheduling, energy monitoring, and an analytics dashboard.

Firebase structure

/relays/{id}      : ON/OFF state
/metadata/{id}    : device name and wattage
/automation/{id}  : schedule rules
/usage/{id}       : consumption data

Why I built it

I wanted a self-hosted alternative to commercial smart plugs, with full control over relay mapping, scheduling logic, and the mobile UI, without subscription fees.