#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 ;

void setup() 
{

Serial.begin(9600);

lcd.begin(16,2);

pinMode(A0, INPUT);
pinMode(LED, OUTPUT);
pinMode(Ch01, INPUT);
pinMode(Ch02, INPUT);

lcd.print("Carregando");
delay(1000);
lcd.setCursor(1,1);
lcd.print(".");
delay(1000);
lcd.setCursor(2,1);
lcd.print(".");
delay(1000);
lcd.setCursor(3,1);
lcd.print(".");
delay(1000);
lcd.setCursor(4,1);
lcd.print(".");
delay(1000);
lcd.setCursor(5,1);
lcd.print(".");
lcd.clear();
lcd.setCursor(4,0);
lcd.print("System ");
lcd.setCursor(5,1);
lcd.print("Error");
delay(1000);
lcd.clear();


}

void loop(){

  

if(digitalRead(Ch01) == LOW)
{

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(100);

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

Serial.print("Tensao = ");
Serial.print(tensao);

Serial.println("V");

delay(100);

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

else
{
  digitalWrite(LED, LOW);
}

if(digitalRead(Ch02)== LOW)
{

lcd.clear();
break;


}


}

}
}