LDR Sensor

/*
 * Titulo: Sensor LDR
 * Autor: João Pereira
 * Email: joaodper@gmail.com
 * Data: 25/07/2021
 */
#include <EEPROM.h>

#define SAIDA 2
#define B_MAIS 3
#define B_MENOS 4
const int LDR = A0;
int input_ldr_val = 0;
int val_saida = EEPROM.read(0);

void setup() {
  // Configura a porta serie
  Serial.begin(9600);
  //Define a porta como saida
  pinMode(SAIDA, OUTPUT);
  pinMode(B_MAIS, INPUT_PULLUP);
  pinMode(B_MENOS, INPUT_PULLUP);
  // Desliga a saida
  digitalWrite(SAIDA, LOW);
}

void loop() {
  
  if (digitalRead(B_MAIS) == LOW) {
    val_saida = val_saida + 10;
    if (val_saida > 1024){
      val_saida = 1024;
    }
    EEPROM.update(0, val_saida);
    delay(200);
  }

  if (digitalRead(B_MENOS) == LOW) {
    val_saida = val_saida - 10;
    if (val_saida < 0){
      val_saida = 0;
    }
    EEPROM.update(0, val_saida);
    delay(200);
  }
  
  input_ldr_val = analogRead(LDR);
  
  if (input_ldr_val < val_saida){
    digitalWrite(SAIDA, HIGH);
  } else {
    digitalWrite(SAIDA, LOW);
  }

  Serial.print("LDR Value is: ");
  Serial.println(input_ldr_val);
  Serial.print("Value: ");
  Serial.println(val_saida);
  delay(10);
}