Módulo sensor LDR sensível à luz

/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : LDR Light Sensor Reading with Arduino Uno
 *  Board     : Arduino UNO (arduino:avr:uno)
 *  Parts     : LDR Light Sensor Module
 *  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.
 * ==================================================================
 */

const int ldrPin = A0;
const int ledPin = 13;

void setup() {
  Serial.begin(115200);
  pinMode(ledPin, OUTPUT);
  Serial.println(F("LDR Light Sensor Initialized"));
}

void loop() {
  int rawValue = analogRead(ldrPin);
  float voltage = rawValue * (5.0 / 1023.0);

  Serial.print(F("Raw: "));
  Serial.print(rawValue);
  Serial.print(F(" | Voltage: "));
  Serial.print(voltage, 2);
  Serial.print(F(" V | Status: "));

  // Turn on built-in LED if light level drops below threshold
  if (rawValue < 400) {
    digitalWrite(ledPin, HIGH);
    Serial.println(F("Dark (LED ON)"));
  } else {
    digitalWrite(ledPin, LOW);
    Serial.println(F("Bright (LED OFF)"));
  }

  delay(300);
}

/*
 * ==================================================================
 *  Generated by Codey.online  —  https://www.codey.online
 * ==================================================================
 *  Project   : ESP32 LDR Light Sensor Reading
 *  Board     : ESP32 DEVKIT V1 (esp32:esp32:esp32doit-devkit-v1)
 *  Parts     : LDR Light Sensor Module
 *  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.
 * ==================================================================
 */

// LDR Light Sensor Demo for ESP32
const int LDR_PIN = 34;

void setup() {
  Serial.begin(115200);
  delay(1000);
  Serial.println("ESP32 LDR Light Sensor Demo");
}

void loop() {
  // Read the analog value (0 - 4095 on ESP32 12-bit ADC)
  int rawValue = analogRead(LDR_PIN);

  // Convert to approximate percentage
  float percentage = (rawValue / 4095.0) * 100.0;

  Serial.print("Raw ADC: ");
  Serial.print(rawValue);
  Serial.print(" | Light Level: ");
  Serial.print(percentage, 1);
  Serial.println("%");

  delay(500);
}