🚀 ESP8266 Blynk-Controlled LED Project 💡

This project allows you to control 5 LEDs using the ESP8266 via the Blynk app over Wi-Fi. Each LED is mapped to a separate button in the Blynk app, enabling individual control. 🎛️

1️⃣ Setting Up the Blynk App

📲 Step 1: Download Blynk

• Install the Blynk IoT app from:
  • 📥 Google Play Store
  • 📥 Apple App Store

🆕 Step 2: Create a New Project

1. Open the Blynk app and sign up/log in.
2. Click ➕ New Project.
3. Enter the Project Name (e.g., "ESP8266 LED Control").
4. Select 📡 Device → Choose ESP8266.
5. Choose 🔗 Connection Type → Set to Wi-Fi.
6. Tap ✅ Create → You will receive an Auth Token via email. 📧

🎛️ Step 3: Add Buttons for LEDs

1. Inside the project, tap the ➕ “+” icon to add widgets.
2. Select 🔘 Button and place it on the screen.
3. Tap the button, set:
   • 📝 Name: LED 1
   • 📍 Pin: V0
   • 🔄 Mode: Switch
4. Repeat this for LED 2, LED 3, LED 4, and LED 5 using V1, V2, V3, and V4.
5. Click 💾 Save and exit the editor.

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2️⃣ Setting Up the ESP8266 Code

📦 Step 1: Install Required Libraries

Ensure you have the following Arduino libraries installed:

• 📂 Blynk (Download)
• 📂 ESP8266WiFi

📡 Step 2: Enter Wi-Fi and Auth Token

Modify the following code snippet in your Arduino IDE:

#define BLYNK_AUTH_TOKEN "YOUR_BLYNK_AUTH_TOKEN" // 🔑 Enter Blynk Auth Token
char ssid[] = "YOUR_WIFI_SSID"; // 📶 Enter Wi-Fi Name
char pass[] = "YOUR_WIFI_PASSWORD"; // 🔐 Enter Wi-Fi Password

🔄 Step 3: Upload the Code to ESP8266

1. 🔌 Connect ESP8266 to PC via USB.
2. 🖥️ Open the Arduino IDE.
3. 🔧 Select Board: "NodeMCU 1.0 (ESP-12E Module)".
4. ⚙️ Select Port (COMx).
5. 📤 Click Upload and wait for completion.

📲 Step 4: Run the Blynk App

1. ⚡ Power the ESP8266.
2. 📱 Open the Blynk app and start the project.
3. 🕹️ Press buttons in the app to control LEDs!

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3️⃣ Circuit Connections

Each LED is connected through a 220Ω resistor to prevent excess current. ⚡

💡 LED	🖥️ ESP8266 Pin	🔘 Virtual Pin
LED 1	D0	V0
LED 2	D1	V1
LED 3	D2	V2
LED 4	D3	V3
LED 5	D4	V4

🔌 Connections:

• 🔴 LED Anode (+) → ESP8266 GPIO pin (D0 - D4) through a 220Ω resistor.
• ⚫ LED Cathode (-) → ESP8266 GND.

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4️⃣ Powering the ESP8266

• ✅ Preferred: USB power or 5V adapter.
• ⚠️ If using a 9V battery: Use a 7805 voltage regulator to step down to 5V.

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5️⃣ Expected Output

✅ Press Button V0 → 💡 LED 1 Turns ON. Press again → LED 1 Turns OFF.
✅ Press Button V1 → 💡 LED 2 Turns ON. Press again → LED 2 Turns OFF.
✅ Repeat for LEDs V2, V3, V4.

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🎉 Now, you can control your LEDs wirelessly using ESP8266 & Blynk! 🚀💡