#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C ld(0x27, 20, 4);



const int trigPin = 5;
const int echoPin = 18;


//define sound speed in cm/uS
#define SOUND_SPEED 0.034
#define CM_TO_INCH 0.393701

long duration;
float distanceCm;

void setup() {
  //Serial.begin(115200);
  lcd.init();
  lcd.backlight();
 
  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  pinMode(15, OUTPUT);
  pinMode(2, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(23, OUTPUT);
  
  lcd.setCursor(0,0);
  lcd.print("Sensor Banjir");
  lcd.setCursor(0,1);
  lcd.print("Poljan Ciparay");
  lcd.setCursor(0,2);
  lcd.print("Citarum");
  lcd.setCursor(0,3);
  lcd.print("Status");
  }

void loop() {
  //Clear the trigPin
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  //Set The trigPin on HIGH state
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);

  

  //Read the echoPin
  duration = pulseIn(echoPin, HIGH);

  distanceCm = duration * SOUND_SPEED/2;

  if (distanceCm >= 180){
    digitalWrite(15, HIGH);
    digitalWrite(2, LOW);
    digitalWrite(4, LOW);
    lcd.setCursor(7,3);
    lcd.print("Aman   ");
    delay(1000);
  }
  
    else if (distanceCm >= 150 && distanceCm <=180){
    digitalWrite(15, LOW);
    digitalWrite(2, HIGH);
    digitalWrite(4, LOW);
    lcd.setCursor(7,3);
    lcd.print("Siaga 1");
    delay(1000);
  }

   else if (distanceCm >= 120 && distanceCm <=150){
    digitalWrite(15, LOW);
    digitalWrite(2, HIGH);
    digitalWrite(4, LOW);
    lcd.setCursor(7,3);
    lcd.print("Siaga 2");
  
    delay(1000);
  }

   else if(distanceCm < 120){
    digitalWrite(15, LOW);
    digitalWrite(2, LOW);
    digitalWrite(4, HIGH);
    lcd.setCursor(7,3);
    lcd.print("Siaga 3");
    
    
    delay(1000);
  }
}