ESP-01S Build-in LED

buildin_led.ino

/*
Written by Lonely Binary
Build-in LED On, Off and Toggle

The ESP-01S module features an onboard Blue LED that is intricately connected to GPIO2. 
When GPIO2 is set to a logic LOW state, it closes the circuit, causing the LED to illuminate.
Conversely, when GPIO2 is set to a logic HIGH state, it opens the circuit, resulting in the LED being turned off. 

ESP-01S Collection:
https://lonelybinary.com/collections/ESP-01S
*/

#define LED_PIN 2

void setup() {
  pinMode(LED_PIN, OUTPUT);
  // LED On for 3 seconds
  digitalWrite(LED_PIN, LOW);
  delay(3000);

  // LED Off
  digitalWrite(LED_PIN, HIGH);
}


void loop() {
  // Toggle the LED
  digitalWrite(LED_PIN, !digitalRead(LED_PIN));
  delay(1000);
}