//Program Water Level
//By Kaila

#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);

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

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(0,0);
  lcd.print("Kaila Salsa Bila");
  lcd.setCursor(3,1);
  lcd.print("XI TEDK 2");
  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(3,0);
lcd.print("jarak = cm");
lcd.setCursor(9,0);
lcd.print(jarak);
delay(100);
int data = digitalRead(jarak);

if(jarak <= 100){
  digitalWrite(buzzer, LOW);
  tone(buzzer,0,5000);
}
if(jarak >= 100){
  digitalWrite(buzzer, HIGH);
  tone(buzzer,1000,5000);
}
if(jarak <= 10){
  digitalWrite(led, LOW);
}
else if (jarak >= 10){
  digitalWrite(led, HIGH);
}

}