Arduino ESP8266 IoT Home Appliance Control System

This project creates an IoT system using an ESP8266 (e.g., NodeMCU) to control home appliances remotely via a web interface, accessible worldwide using Pusher Channels for real-time communication.

Overview

This system allows you to control up to four home appliances (e.g., lights, fans) remotely using an ESP8266 microcontroller connected to relay modules. The web interface, hosted as a single HTML file, communicates with the ESP8266 via Pusher Channels, enabling global access over the internet.

Features

• Control appliances (ON/OFF) from anywhere in the world with an internet connection.
• Real-time communication using WebSockets via Pusher Channels.
• Simple web-based UI with buttons for each relay.
• Uses ESP8266 for Wi-Fi connectivity and relay control, eliminating the need for an Arduino.

Hardware Requirements

• ESP8266 Module: NodeMCU (recommended: ESP8266 NodeMCU CP2102 Board) or ESP-01
• Relay Module: 4-channel, 5V, active-low relay module
• Home Appliances: Low-power devices (e.g., LED lights, small fans) for testing
• Jumper Wires: For connecting components
• Power Supply: 5V USB for NodeMCU
• Wi-Fi Network: With internet access for global connectivity

Software Requirements

• Arduino IDE: For programming the ESP8266
  • Install ESP8266 board support (http://arduino.esp8266.com/stable/package_esp8266com_index.json)
  • Libraries: ESP8266WiFi, WebSocketsClient
• Pusher Channels Account: Free tier available at pusher.com
• Web Browser: For accessing the HTML interface

Setup Instructions

1. Hardware Setup

• Connect the relay module to the NodeMCU:
  • VIN → Relay VCC (5V from USB)
  • GND → Relay GND
  • D1 (GPIO 5) → Relay IN1
  • D2 (GPIO 4) → Relay IN2
  • D3 (GPIO 0) → Relay IN3
  • D4 (GPIO 2) → Relay IN4
• Connect appliances to the relay’s NO (Normally Open) and COM (Common) terminals, ensuring a separate power source (e.g., 220V AC) for high-voltage appliances.
• Power the NodeMCU via USB.

2. Software Setup

a. Create a Pusher Channels App

• Sign up at pusher.com and create a new app (e.g., “HomeControl”).
• Note your Pusher credentials from the dashboard:
  • App ID (e.g., 1946828)
  • Key (e.g., c2fb34fa880960a9e301)
  • Secret (e.g., 14edbc135cc73dae09ea)
  • Cluster (e.g., ap2 for Asia Pacific, Mumbai)

b. Program the ESP8266

• Install the required libraries in Arduino IDE:
  • ESP8266WiFi
  • WebSocketsClient
• Open the ESP8266_IoT_Control.ino file (or copy the code from this repository) and update:
  • Wi-Fi credentials (ssid, password)
  • Pusher credentials (PUSHER_KEY, PUSHER_CLUSTER)
• Select “NodeMCU 1.0” as the board and upload the code to the ESP8266.

c. Host the Web Interface

• Save the index.html file provided in this repository.
• Open it in a web browser locally, or host it on a static site (e.g., GitHub Pages) for global access.
• Update the HTML file with your Pusher credentials (Key, App ID, Secret, Cluster).

3. Testing

• Power on the NodeMCU and check the Serial Monitor (115200 baud) for Wi-Fi and Pusher connection status.
• Open index.html in a browser from any internet-connected device.
• Click the “ON” and “OFF” buttons to control the relays, and verify appliance responses in the Serial Monitor.

Usage

• Access the web interface by opening index.html or its hosted URL.
• Use the buttons to toggle each relay (1–4) ON or OFF.
• The system uses Pusher Channels for real-time communication, allowing control from anywhere with internet access.

Troubleshooting

• ESP8266 Not Connecting to Wi-Fi: Check Wi-Fi credentials and network signal.
• Pusher Connection Issues: Verify Pusher credentials, ensure internet access, and check for firewall restrictions on port 80.
• HTML Interface Not Working: Ensure Pusher credentials are correct, the browser has internet access, and no ad blockers interfere with WebSocket or API requests.
• Relay Not Responding: Verify hardware connections, relay logic (active-low), and appliance power supply.

Contributing

Feel free to fork this repository, make improvements, and submit pull requests. Issues and suggestions are welcome!

License

This project is open-source and available under the MIT License. See the LICENSE file for details (if applicable).

Contact

• Author: Dr Neelesh Rajput
• Email: [email protected]
• GitHub: https://github.com/Neeleshrajput55

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