ESP32 Smart Home Automation using Relay & Blynk App | Control Devices Wirelessly with WiFi
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In this beginner-friendly IoT project, you’ll learn how to create a Smart Home Automation System using the ESP32 WiFi module, a relay, and the Blynk IoT app to control electrical devices wirelessly over WiFi.
With just a few components and simple Arduino code, you’ll be able to switch on/off an LED and a DC fan remotely through your smartphone — bringing smart automation right to your fingertips!
Whether you're automating your room lights, fans, or appliances — this project offers a hands-on way to explore real-world IoT applications using the versatile ESP32 board and relay control logic.
This project demonstrates how to connect and control a relay module using ESP32, power it with an external battery, and communicate with the Blynk app for seamless wireless control. Perfect for students, hobbyists, and aspiring IoT developers!

🔍 What You’ll Learn:
✅ How to control electrical devices using a relay and ESP32
✅ How to power a relay module with a 4 AA battery pack
✅ How to connect and control GPIO pins with the Blynk app
✅ How to create real-time wireless control using WiFi
✅ How to build beginner-level home automation systems

🧰 Components Required:
🔹 1 x ESP32 Development Board
🔹 1 x Single Channel Relay Module
🔹 1 x 4 AA Battery Pack (6V output)
🔹 1 x LED
🔹 1 x 220-ohm Resistor
🔹 1 x 5V DC Fan or Small Appliance
🔹 Jumper Wires
🔹 Breadboard (optional)
🔹 Micro USB Cable
🔹 Smartphone with Blynk App Installed
🔹 Arduino IDE installed on your Computer

🖥️ Download Arduino IDE:
www.arduino.cc/en/software
📥 Download Arduino Code:
roboarmypublicfiles.s3.ap-south-1.amazonaws.com/co…
📄 Download Arduino Code Word File (.docx):
roboarmypublicfiles.s3.ap-south-1.amazonaws.com/co…
📊 Circuit Diagram:
roboarmypublicfiles.s3.ap-south-1.amazonaws.com/ci…
🔧 Additional Board Manager URL (ESP32 Board):
raw.githubusercontent.com/espressif/arduino-esp32/…

🎓 Cover Topics:
ESP32 Relay Projects, Smart Home Automation, ESP32 with Blynk, IoT Control Systems, ESP32 WiFi Projects, Home Automation Using Arduino, DIY IoT Projects, ESP32 Tutorials, Smart Fan Control, WiFi Controlled Relay, Home IoT with Blynk, Practical IoT Systems, ESP32 GPIO Projects, STEM Electronics, IoT for Beginners, Wireless Automation Solutions

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