Smart Home Automation & IoT Energy Hub
A modular ESP32-powered home automation controller supporting multi-channel relay switching, MQTT telemetry, local web dashboard, and physical wall switch overrides.
Arduino 4-Channel optocoupler relay hub
Overview
Our Smart Home Automation Controller integrates Wi-Fi and Bluetooth connectivity with optocoupler-isolated relay modules, current sensors, and a real-time MQTT dashboard. Built around the ESP32 dual-core microcontroller, it enables voice, app, and local web-based control of appliances while retaining physical switch synchronization.
Highlights
- Optocoupler-isolated 4-channel 250V relay switching
- Real-time MQTT telemetry & local WebServer control
- Dual-way physical wall switch synchronization
- Current monitoring with overload auto-cutoff
The Challenge
Maintaining instantaneous physical switch state updates over WebSocket while managing non-blocking MQTT reconnection loops.
The Outcome
Deployed in community workshops as our primary IoT learning kit, teaching students full-stack embedded development from relay wiring to web dashboards.
Project Media & Build Gallery
[1 PHOTOS]Arduino 4-Channel optocoupler relay hub
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