🌡️ Smart Fan Control with ESP8266, DHT22 & Shelly Plug

This project uses an ESP8266 microcontroller and DHT22 sensors to monitor indoor and outdoor temperature and humidity. The data is exposed via a REST API and consumed by a Shelly Plug script, which automatically controls a fan based on real-time environmental conditions.

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🚀 Features

• 📡 Real-time data collection with ESP8266
• 🌬️ Indoor & outdoor temperature and humidity monitoring
• 🔌 Smart fan automation via Shelly Plug scripting
• 🌐 RESTful API for seamless data access

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🧠 Use Case

Perfect for smart home environments where automated ventilation is needed based on temperature and humidity thresholds—ideal for rooms with poor airflow, greenhouses, or server closets.

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🛠️ Arduino IDE Setup

Recommended Version: 2.3.6

🔌 Pin Overview

Refer to the WeMos D1 Pinout for wiring details. https://github.com/corerd/WeMosD1

📥 Install ESP8266 Board Support

Follow this guide: Getting Started with ESP8266

https://lastminuteengineers.com/getting-started-with-esp8266/#installing-the-esp8266-core

Board Manager URL:

http://arduino.esp8266.com/stable/package_esp8266com_index.json

Board Settings:

• Board: "Wemos D1 pro"
• Upload Speed: 115200

📚 Required Libraries

• ArduinoJson
  Handling JSON with ESP8266 https://medium.com/@punnyarthabanerjee/esp8266-handling-data-in-json-7c6f62c9062e

• DHT Sensor Library
  DHT22 with ESP8266 Tutorial https://lastminuteengineers.com/esp8266-dht11-dht22-web-server-tutorial/

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📡 REST API

• Endpoint: /
• Port: 8080

📦 Sample JSON Response

{
  "indoor": {
    "temperature": 22.8,
    "humidity": 53.5
  },
  "outdoor": {
    "temperature": 22.9,
    "humidity": 53.5
  }
}