Módulo de relé 12v

/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : 12V Relay Module Control
 *  Board     : Arduino UNO (arduino:avr:uno)
 *  Parts     : Relais Module 12v AC250V 10A Relais 12v 1 relais LED indicator
 *  Libraries : none (built-in)
 *
 *  Codey Online is an AI-powered browser IDE for Arduino and ESP32.
 *  Describe your project and Codey writes the code, draws the wiring
 *  diagram and uploads it to your board, straight from the browser.
 *  This code is free to use, modify and share, without warranty.
 * ==================================================================
 */

// Pin configuration
const int RELAY_PIN = 7;

void setup() {
  // Initialize serial communication
  Serial.begin(115200);
  while (!Serial) {
    ; // Wait for serial port to connect
  }
  
  // Configure relay control pin
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, HIGH); // Default off (active-low module)

  Serial.println(F("12V Relay Module Demo Initialized"));
}

void loop() {
  // Activate relay (Low-level trigger)
  Serial.println(F("Relay: ON"));
  digitalWrite(RELAY_PIN, LOW);
  delay(2000);

  // Deactivate relay
  Serial.println(F("Relay: OFF"));
  digitalWrite(RELAY_PIN, HIGH);
  delay(2000);
}

/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : 12V Relay Control with ESP32
 *  Board     : ESP32 DEVKIT V1 (esp32:esp32:esp32doit-devkit-v1)
 *  Parts     : Relais Module 12v AC250V 10A Relais 12v 1 relais LED indicator
 *  Libraries : none (built-in)
 *
 *  Codey Online is an AI-powered browser IDE for Arduino and ESP32.
 *  Describe your project and Codey writes the code, draws the wiring
 *  diagram and uploads it to your board, straight from the browser.
 *  This code is free to use, modify and share, without warranty.
 * ==================================================================
 */

// Pin connected to relay control input
const int RELAY_PIN = 4;

void setup() {
  Serial.begin(115200);
  
  // Configure relay pin as output
  pinMode(RELAY_PIN, OUTPUT);
  digitalWrite(RELAY_PIN, LOW);
  
  Serial.println("ESP32 12V Relay Demo Started");
}

void loop() {
  // Turn relay ON
  Serial.println("Relay ON");
  digitalWrite(RELAY_PIN, HIGH);
  delay(2000);

  // Turn relay OFF
  Serial.println("Relay OFF");
  digitalWrite(RELAY_PIN, LOW);
  delay(2000);
}