#include <LiquidCrystal_I2C.h>
#include <Wire.h>
#include <HCSR04.h>

const int pinEcho = 5;
const int pinTrig = 6;
float distance = 0;

LiquidCrystal_I2C lcd(0x27,20,4);
UltraSonicDistanceSensor uSensor(pinTrig, pinEcho,300);

void setup() {
  pinMode(pinTrig, OUTPUT);
  pinMode(pinEcho, INPUT);

  lcd.init();
  lcd.backlight();
  lcd.setCursor(1,0);
  lcd.print("Ultraschall-Sensor");
  lcd.setCursor(5,1);
  lcd.print("Sarah LG55");
  delay(2000);
  lcd.clear();
}

void loop() {
  distance = uSensor.measureDistanceCm();

  if (distance>= 0)
  {
    lcd.setCursor(0,0);
    lcd.print("Entfernung: ");
    lcd.print(distance);
    lcd.print("cm  ");
    delay(200);
  }
  else
  {
    lcd.setCursor(0,0);
    lcd.print("Entfernung zu gross ");
  }
  delay(200);
}