In this project, we will demonstrate how to interface a single LED (Light Emitting Diode) with an ESP8266 board.

The ESP8266 board will be programmed to control the LED and make it blink at a specific rate.

Hardware Required:

1. ESP8266 board (e.g., NodeMCU )
2. LED module
3. Jumper wires

Connection Diagram:

Connections: ESP8266 Board Led Module 5V Vcc(5V) D1 Led pin 1

Code: Below is the Arduino code to control the LED:

// projectkitsandparts.com

// Define the pin connected to the LED

const int ledPin = 5;//D1

void setup() {

  // Set the LED pin as an output

  pinMode(ledPin, OUTPUT);

}

void loop() {

  // Turn the LED on

  digitalWrite(ledPin, HIGH);

  // Wait for 1 second

  delay(1000);

  // Turn the LED off

  digitalWrite(ledPin, LOW);

  // Wait for 1 second

  delay(1000);

}

Code Explanation:

1. The ledPin variable is declared and set to 5, which corresponds to the GPIO pin connected to the LED on the ESP8266 board.
2. In the setup() function, the ledPin is set as an output using the pinMode() function.
3. The loop() function is where the LED control happens.
4. The LED is turned on by setting the ledPin to HIGH using digitalWrite().
5. The program waits for 1 second using delay(1000).
6. The LED is turned off by setting the ledPin to LOW.
7. Another 1-second delay is added.
8. The loop repeats, toggling the LED on and off continuously.