#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C LCD(0x27, 16, 2);
int botao1 = 19;
int botao2 = 23;
int botao3 = 18;
int led1 = 14;
int x;
int y;

#define T 12
#define E 14
long duration;
int distance;
void setup() {
  LCD.init();
  LCD.backlight();
  pinMode(led1, OUTPUT);
  pinMode(botao1, INPUT);
  pinMode(botao2, INPUT);
  pinMode(botao3, INPUT);
  pinMode(T, OUTPUT);
  pinMode(E, INPUT);
  LCD.init();
  LCD.backlight();
  LCD.setCursor(0, 0);
  LCD.print(" SENAI CFP 1.01 ");
  LCD.setCursor(0, 1);
  LCD.print(" TEC. MECATRONICA ");
  delay(1000);
  LCD.clear();
}
void loop() 
{ 
  bool bot1=digitalRead(botao1);
  bool bot2=digitalRead(botao2);
  bool bot3=digitalRead(botao3);
  digitalWrite(T, HIGH);
  delayMicroseconds(10);
  digitalWrite(T, LOW);
  duration = pulseIn(E, HIGH);
  int contador = duration  ;
  distance =  contador;
  LCD.setCursor(0, 0);
  LCD.print("sensor: ");
  LCD.print(distance);
  LCD.setCursor(0, 1);
  LCD.print("limite: ");
  LCD.print(y);
  LCD.setCursor(13, 1);
  LCD.print(x);

  if(bot1==HIGH)x++;
  if(bot2==HIGH)x--;
  if(bot3==HIGH)y=x;
  if(distance > y)alarme();

}
void alarme(){
  digitalWrite(led1, HIGH);
  digitalWrite(led1, LOW);
  digitalWrite(led1, HIGH);
  digitalWrite(led1, LOW);
  digitalWrite(led1, HIGH);
  digitalWrite(led1, LOW);
  digitalWrite(led1, HIGH);
  digitalWrite(led1, LOW);
}