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Smart Knob - ESP-NOW Based Wireless Appliance Control

Overview

A cost-effective, accessible knob interface to wirelessly control non-smart home appliances using ESP-NOW protocol, designed especially for the elderly and mobility-impaired users.

Features

  • Uses rotary encoder for intuitive control
  • ESP32 modules for wireless communication
  • Relay-based control of lights/fans
  • Feedback via buzzer for interaction confirmation
  • Low-cost build under ₹2000

Folder Structure

  • code/ – Arduino .ino files for transmitter and receiver
  • diagrams/ – Flow diagrams and charts
  • hardware/ – Overview photos of the built prototype

Hardware Used

  • ESP32 × 2
  • Rotary Encoder
  • Relays, Buzzer, Switches
  • Breadboard, jumper wires

Project Team