Here is a simple, complete, and beginner-friendly guide for Node.js Raspberry Pi GPIO Blinking LED.

🔴 Node.js Raspberry Pi – Blinking LED (GPIO Output)

Blinking an LED is the first step in learning GPIO programming on Raspberry Pi.
With Node.js, it becomes very easy and fun!

✅ 1. What You Need

Hardware:

• 1 × Raspberry Pi (any model with GPIO)

• 1 × LED (any color)

• 1 × 330Ω resistor

• Jumper wires

• Breadboard (optional)

📌 2. Wiring the LED

Connect as follows:

• GPIO17 (Pin 11) → Resistor → LED Anode (+)

• LED Cathode (–) → Ground (Pin 6)

The long leg of the LED = positive (anode)

📦 3. Install GPIO Library

Use the onoff package:

💡 4. Create the Blink Script

Create a file:

Paste this code:

▶ 5. Run the Script

Because GPIO needs root access:

You should see the LED blink every 500ms.

🧪 Optional: Change Blink Speed

Fast blink (100ms):

⚠ Important Safety Notes

• Raspberry Pi GPIO pins output 3.3V only, never 5V.

• Always use a resistor to prevent LED burn-out and GPIO damage.

• Always stop your script before unplugging wires.