ESP8266 Fan Controller with Web Interface

This project is an ESP8266-based controller for three PWM fans, which allows remote control of fan speeds through a web interface. You can set individual fan speeds (in percentage) and optionally set timers to turn off the fans automatically after a set number of hours. This setup is ideal for controlling fans or similar PWM devices.

Features

• Control up to 3 fans individually with speed control (0-100%)
• Set timers for each fan to automatically turn off after a specified number of hours
• Web-based interface with mobile-friendly design
• Over-the-Air (OTA) updates for easy firmware deployment
• Built-in ESP8266 Wi-Fi connectivity

Hardware Requirements

• ESP8266 (e.g., NodeMCU, Wemos D1 Mini)
• LM2596 DC-DC Step-down Power Supply Module to provide 5V for the ESP8266
• Three PWM-controllable fans or PWM controller - MOS FET Trigger Switch Drive Module DC 5V-36V PWM Regulator (connect to D5, D6, and D7)
• Power supply compatible with the fans

Software Requirements

• Platformio

Installation

1. Clone or Download this repository to your local machine.
2. Set Up Wi-Fi Credentials:
   • Open the Arduino sketch and enter your Wi-Fi SSID and password in the setup function:

     const char* ssid = "YOUR_SSID";
     const char* password = "YOUR_PASSWORD";

3. Upload Code to your ESP8266 using Platformio.
4. Access the Web Interface:
   • Once connected to Wi-Fi, open a web browser and navigate to the IP address shown in the Serial Monitor.
   • Control fan speeds and timers directly from the interface.

Usage

Web Interface

• Fan Speed Control: Choose from 0% to 100% for each fan individually by pressing the corresponding buttons.
• Timer: Set a timer to turn off all fans automatically after 1, 2, 4, or 8 hours. Set to "OFF" to disable the timer.

API Endpoints

This project provides simple HTTP endpoints for direct API control:

1. Set Fan Speed: /setfan?fan={fan}&value={speed}&hours={timer}

   • fan: Fan number (1, 2, or 3)
   • value: Speed percentage (0-100)
   • hours: Timer setting in hours (0 to disable)
   • Example: /setfan?fan=1&value=70&hours=2

2. Get Fan Speed: /getFanSpeed?fan={fan}

   • fan: Fan number (1, 2, or 3)
   • Example: /getFanSpeed?fan=1

Code Overview

• Fan Control: PWM is used to set fan speeds, with a duty cycle corresponding to the selected percentage (0-100%).
• Timers: Automatically turns off fans after the set duration (in hours).
• OTA: Over-the-Air updates are enabled for easy firmware updates without physical access.

Future Improvements

• Fan Status Indicator: Show current fan speed and timer settings on the web interface.
• Additional Sensors: Integrate temperature or humidity sensors for automated fan control based on environmental conditions.
• OpenHAB Integration: Further customize for smart home integration.

Project photos

License

This project is open-source and available under the MIT License.

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Enjoy your smart fan control setup! Feel free to contribute to this project by submitting pull requests.