Smart Wi-Fi Touch Switch

IoT touch switch that replaces any standard wall switch — touch-sensitive panel with LED indication, relay-based load switching, and remote control from anywhere in the world via smartphone

Project Overview

Designed a smart Wi-Fi touch switch that replaces any standard wall switch, upgrading it to a touch-sensitive panel controllable from a smartphone — from anywhere in the world. The system combines a sleek aluminum touch switch panel with green LED status indicators, an ESP8266 Wi-Fi module, a microcontroller for touch detection and command processing, and a relay board for actual load switching. No rewiring needed — it plugs directly into existing switch wiring.

Aluminum touch switch panel with dual touch zones and green LED status indicators — active channels glowing (left). Controller system: SMPS power supply, ESP8266 Wi-Fi + MCU controller board, and 8-channel relay switching board (right).

Key Features

  • Touch-Sensitive Panel — sleek aluminum wall switch panel replaces any standard switch
  • Green LED Indication — per-channel status LEDs show ON/OFF state at a glance
  • Wi-Fi Remote Control — ESP8266 enables ON/OFF control from smartphone anywhere in the world
  • Relay Switching — 8-channel relay board handles actual AC load switching
  • Drop-in Replacement — connects to existing switch wiring, no structural changes needed
  • Local Touch + Remote App — works both as a physical touch switch and a remote IoT switch
  • SMPS Power Supply — reliable regulated power for the entire system

Hardware Architecture

Block Implementation
Touch Panel Aluminum wall plate with capacitive/resistive touch zones + green LED indicators
Wi-Fi ESP8266 (ESP-01) — remote control via smartphone from anywhere
MCU DIP microcontroller — touch detection, relay logic, Wi-Fi command handling
Relay Board 8× relays + screw terminals — AC load switching per channel
Power SMPS — regulated DC supply for logic and relay coils

Technologies & Tools

  • ESP8266 — Wi-Fi firmware, HTTP/MQTT remote switching
  • Embedded C — touch detection and relay sequencing
  • Custom PCB design — controller and relay boards
  • Touch interface and LED indicator design

Key Achievements

✅ Designed a complete drop-in smart switch replacing any standard wall switch
✅ Touch-sensitive panel with green LED status indicators for intuitive use
✅ Wi-Fi remote control from anywhere in the world via smartphone
✅ 8-channel relay board for multi-circuit load switching
✅ Seamlessly combines local touch control and remote IoT operation