#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);
const int trigPin1 = 12;
const int echoPin1 = 13;
const int trigPin2 = 10;
const int echoPin2 = 9;
const int trigPin3 = 8;
const int echoPin3 = 7;
const int buzzer = 11;
long durasi;
int jarak1,jarak2,jarak3;
void setup (){
lcd.begin(20,4);
lcd.setBacklight(HIGH);
  pinMode(trigPin1,OUTPUT);
  pinMode(echoPin1,INPUT);
  pinMode(trigPin2,OUTPUT);
  pinMode(echoPin2,INPUT);
  pinMode(trigPin3,OUTPUT);
  pinMode(echoPin3,INPUT);
  digitalWrite(trigPin1, LOW);
  digitalWrite(trigPin2, LOW);
  digitalWrite(trigPin3, LOW);
  pinMode(buzzer,OUTPUT);
  Serial.begin(9600);}
void loop (){
  sump1(); 
  sump2(); 
  sump3();
  lcd.setCursor(0,0);//sump1
  lcd.print("Sump1:");
  lcd.print(jarak1);
  lcd.print("cm");
  lcd.backlight();
  delay(5000);
  lcd.setCursor(0,0);//sump2
  lcd.print("Sump2:");
  lcd.print(jarak2);
  lcd.print("cm");
  lcd.backlight();
  delay(5000);
  lcd.clear();
  lcd.setCursor(0,0);//sump3
  lcd.print("Sump3:");
  lcd.print(jarak3);
  lcd.print("cm");
  lcd.backlight();
  delay(5000);
  lcd.clear();}
void sump1(){
  digitalWrite(trigPin1,LOW);//sump1
  delayMicroseconds(2);
  digitalWrite(trigPin1,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin1,LOW);
  durasi = pulseIn(echoPin1,HIGH);
  jarak1 = (durasi/ 2) / 29,1; }
void sump2(){
  digitalWrite(trigPin2,LOW);//sump1
  delayMicroseconds(2);
  digitalWrite(trigPin2,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin2,LOW);
  durasi = pulseIn(echoPin2,HIGH);
  jarak2 = (durasi/ 2) / 29,1; }
void sump3(){
  digitalWrite(trigPin3,LOW);//sump1
  delayMicroseconds(2);
  digitalWrite(trigPin3,HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin3,LOW);
  durasi = pulseIn(echoPin3,HIGH);
  jarak3 = (durasi/ 2) / 29,1;}