//Program Water Level
//By RIzal

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

int trig = 12;
int echo = 11;
int buzz = 2;
int LED = 3;
long jarak,durasi;

void setup() {
 pinMode(trig, OUTPUT);
 pinMode(echo, INPUT);
 pinMode(buzz, OUTPUT);
 pinMode(LED, OUTPUT);
 Serial.begin(9600);

 lcd.init();
 lcd.clear();
 lcd.backlight();
 lcd.setCursor(0,0);
 lcd.print("   WELCOME TO"   );
 lcd.setCursor(0,1);
 lcd.print("  WATER  LEVEL  ");
 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(9,0);
lcd.print(jarak);
delay(270);

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