#include <LiquidCrystal.h>

#define RS 7
#define E  6
#define D4 12
#define D5 10
#define D6 9
#define D7 8

#define LED 4
#define ch01 1
#define ch02 2

LiquidCrystal lcd(RS,E,D4,D5,D6,D7);

int valor = 0;
float tensao = 0;

char z = 255;

void setup()
{

  Serial.begin(9600);

  lcd.begin(16,2);

  pinMode(A0, INPUT);
  pinMode(LED, OUTPUT);
  pinMode(ch01, INPUT);
  pinMode(ch02, INPUT);

  lcd.print(z);

  

}

void loop()
{


  if( digitalRead(ch01) == LOW  )
  {

    lcd.print("SISTEMA LIGADO ");
    delay(1000);
    lcd.clear();
    lcd.print("LOADING ");
    lcd.setCursor(0,1);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);
    lcd.print(".");
    delay(1000);  

    lcd.clear();

  lcd.print("Valor = ");
  lcd.setCursor(0,1);
  lcd.print("Tensao =");

  while(1)
  {

lcd.setCursor(10,0);
lcd.print(valor);
lcd.print(" ");

lcd.setCursor(10,1);
lcd.print(tensao);
lcd.print(" ");
lcd.print("V");

valor = analogRead(A0);

tensao = valor * 0.00488759;

delay(1000);

Serial.print("Valor =  ");
Serial.println(valor);

Serial.print("Tensão =  ");
Serial.print(tensao);
Serial.println(" V");


delay(1000);

if(tensao >= 2.5)
{
  digitalWrite(LED, HIGH);
}

else
{
  digitalWrite(LED, LOW);
}

if(digitalRead(ch02) == LOW)
{
  
  digitalWrite(LED, LOW);
  lcd.clear();
  break;
}

  }

}
}







 

/*// include the LiquidCrystal.h library 
#include <LiquidCrystal.h>
// Double slash for adding single line comments
const int rs = 7;   // Pin 7  on Arduino to pin 4  (RS) on LCD
const int en = 6;   // Pin 6  on Arduino to pin 6  (E)  on LCD
const int d4 = 12;  // Pin 12 on Arduino to pin 11 (D4) on LCD
const int d5 = 10;  // Pin 10 on Arduino to pin 12 (D5) on LCD
const int d6 = 9;   // Pin 9  on Arduino to pin 13 (D6) on LCD
const int d7 = 8;   // Pin 8  on Arduino to pin 14 (D7) on LCD

LiquidCrystal lcd(rs, en, d4, d5, d6, d7);

void setup() {
  // Set up the LCD's number of columns and rows:
  lcd.begin(16, 2);
  // Print Hello World! to the LCD.
  lcd.print("Hello World!");
}

void loop() {
 
}*/