//PROGRAM WATER LEVEL 
//BY NAZWA PUTRI ANANDA IDRUS II
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

int trig = 12;
int echo = 11;
int buzzer = 2;
int led = 3;
long jarak,durasi;

void setup() {
  pinMode(trig, OUTPUT);
  pinMode(echo, INPUT);
  pinMode(buzzer, OUTPUT);
  pinMode(led, OUTPUT);
  Serial.begin(9600);
  lcd.init();
  lcd.clear();
  lcd.backlight();
  lcd.setCursor(3,0);
  lcd.print(" HALLO ");
  lcd.setCursor(0,1);
  lcd.print(" ANAK COLEH ");
  delay(2000);
  lcd.clear();
}

void loop(){
  digitalWrite(trig, HIGH);
  delayMicroseconds(5);
  digitalWrite(trig, LOW);
  delayMicroseconds(5);

durasi = pulseIn(echo,HIGH);
jarak = durasi/ 58.35;

Serial.print(jarak);
Serial.println("cm");

lcd.setCursor(0,0);
lcd.print("jarak=     cm");
lcd.setCursor(8,0);
lcd.print(jarak);
delay(1000);

int data = digitalRead(jarak);
if(jarak <= 100){
  digitalWrite(buzzer, LOW);
  tone(buzzer,0,5000);
 }

else if(jarak >=100){
  digitalWrite(buzzer, HIGH);
  tone(buzzer,1000,5000);
   }

if(jarak >100){
  digitalWrite(led, HIGH);
}
else if(jarak < 10){
  digitalWrite(led, LOW);
}
}