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LED Blink with ESP32

A simple ESP32 project to blink an LED connected to a digital GPIO pin using basic digitalWrite() control.

Overview

This project turns an LED ON for 1 second and OFF for 1 second continuously using an ESP32 board.

The LED is connected to GPIO pin 15.

Simulation Link

Open Simulation

Circuit Diagram

View Circuit Diagram

Circuit Connection

Components Required

  • ESP32 board
  • LED
  • 220Ω resistor
  • Breadboard
  • Jumper wires

Circuit Connection

Component Connection
LED Anode (+) GPIO 15
LED Cathode (-) GND through 220Ω resistor

Code

#define LED 15

void setup() {
  pinMode(LED, OUTPUT);
}

void loop() {
  digitalWrite(LED, HIGH); // LED ON
  delay(1000);

  digitalWrite(LED, LOW);  // LED OFF
  delay(1000);
}

How It Works

  • pinMode(LED, OUTPUT) configures GPIO 15 as an output pin.
  • digitalWrite(LED, HIGH) turns the LED ON.
  • delay(1000) waits for 1000 milliseconds (1 second).
  • digitalWrite(LED, LOW) turns the LED OFF.
  • The loop repeats continuously.

Upload Instructions

  1. Connect your ESP32 board to your computer.
  2. Open the ARDUINO IDE.
  3. Select the correct board and COM port.
  4. Paste the code into a new sketch.
  5. Click Upload.
  6. The LED should start blinking after upload.

Learning Concepts

  • GPIO output control
  • Using pinMode()
  • Using digitalWrite()
  • Timing with delay()
  • Basic embedded programming with ESP32

License

This project is open-source and free to use for learning purposes.