#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPL6jSTXfalb"
#define BLYNK_TEMPLATE_NAME "Banjir"
#define BLYNK_AUTH_TOKEN "r4BFr7ZgCPrJrG1o9SkPCOgqgjE1O2jj"

#define ECHO_PIN 15
#define TRIG_PIN 2
#define indikator 27

#define buzzer 4
int pinValue;
int tombol;
int a = 0;
int duration ;
int distance;

#include <ESP32Servo.h>
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 20, 4);

char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

Servo myservo; 
BlynkTimer timer;

void setup() { 
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);  
  pinMode(indikator, OUTPUT);  
  lcd.init();
  lcd.backlight();
  Blynk.begin(auth, ssid, pass);
  timer.setInterval(1000L, sendSensor);
  myservo.attach(13); 
  myservo.write(0);
  Blynk.virtualWrite(V0, 0); // Buka tutu pintu air
  Blynk.virtualWrite(V1, 0); //keadaan pintu air
  Blynk.virtualWrite(V2, 0); //jarak sensor
  Blynk.virtualWrite(V3, 0); // kondisi buzzer
  Blynk.virtualWrite(V4, 0);// Siaga 1,2,3
  Blynk.virtualWrite(V5, 0);// Tombol Operasi
  lcd.setCursor(0, 0);
  lcd.print(" PENDETEKSI BANJIR ");    
}

void loop() {    
  sendSensor();
  Blynk.run();
  timer.run();    
}

BLYNK_WRITE(V0){
  myservo.write(param.asInt());
  pinValue = param.asInt();
  if (pinValue > 2) {    
    Blynk.virtualWrite(V1, "Terbuka "+String(pinValue)+" Derajat");
    
  }else{
    Blynk.virtualWrite(V1, "Terutup "+String(pinValue)+" Derajat");
  } 
}

BLYNK_WRITE(V5){
  tombol = (param.asInt());  
  if (tombol == 1) {        
    a = 1;    
    myservo.write(0);
    delay(1000);
    Blynk.virtualWrite(V0, 0);
    pinValue = 0;
  }else{
    a = 0;
    Blynk.virtualWrite(V0, 0);
    pinValue = 0;
  } 
}

void sendSensor() {
  digitalWrite (indikator, HIGH);
  Blynk.virtualWrite(V2, "Ketinggian Air " +String(distance)+" CM");
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  duration = pulseIn(ECHO_PIN, HIGH);
  distance = (duration * 0.034 / 2)+1;

if (a == 0){  
  Blynk.virtualWrite(V0, 0);
  if (distance >= 0 && distance <= 30){
    Blynk.virtualWrite(V1, "Pintu Tertutup 0 Djt");
    Blynk.virtualWrite(V4, "Kondisi Ketinggian Air Normal");
    Blynk.virtualWrite(V3, "Buzzer OFF");
    lcd.setCursor(0, 1);
    lcd.print("Tinggi Air: "); 
    lcd.print(distance);  
    lcd.print(" cm");  
    lcd.setCursor(0, 2);
    lcd.print("Pintu Air Tertutup  ");
    lcd.setCursor(0, 3);
    lcd.print("Tinggi Air Normal   ");     
    myservo.write(0);
    delay(100);
  }
  if (distance > 30 && distance <= 60){
    Blynk.virtualWrite(V1, "Pintu Air Terbuka 30 Derajat");
    Blynk.virtualWrite(V4, "Siaga 3, Berpotensi Terjadi Banjir");
    Blynk.virtualWrite(V3, "Buzzer OFF");
    lcd.setCursor(0, 1);
    lcd.print("Tinggi Air: "); 
    lcd.print(distance);
    lcd.print(" cm");
    lcd.setCursor(0, 2);
    lcd.print("Pintu Air Terbuka   ");
    lcd.setCursor(0, 3);
    lcd.print("Kondisi Siaga 3    ");
    myservo.write(30);              
    delay(15);
  }
  if (distance > 60 && distance <= 100){
    Blynk.virtualWrite(V1, "Pintu Air Terbuka 60 Derajat");
    Blynk.virtualWrite(V4, "Siaga 2, Segera Lakukan Mitigasi");
    Blynk.virtualWrite(V3, "Buzzer ON");
    lcd.setCursor(0, 1);
    lcd.print("Tinggi Air: "); 
    lcd.print(distance);
    lcd.print(" cm");
    lcd.setCursor(0, 2);
    lcd.print("Pintu Air Terbuka   ");
    lcd.setCursor(0, 3);
    lcd.print("Kondisi Siaga 2     ");
    myservo.write(60);    
    tone (buzzer, 120);
    delay(1000);
    noTone(buzzer);
  }

  if (distance >100){
    Blynk.virtualWrite(V1, "Pintu Air Terbuka 90 Derajat");
    Blynk.virtualWrite(V4, "Siaga 1, Silahkan Mengungsi");
    Blynk.virtualWrite(V3, "Buzzer ON");
    lcd.setCursor(0, 1);
    lcd.print("Tinggi Air: "); 
    lcd.print(distance);
    lcd.print(" cm");
    lcd.setCursor(0, 2);
    lcd.print("Pintu Air Terbuka   ");
    lcd.setCursor(0, 3);
    lcd.print("Kondisi Siaga 1     ");
    myservo.write(90);    
    tone (buzzer, 300);
    delay(300);
    noTone(buzzer);
  }  
}else{
   Blynk.virtualWrite(V1, "Pintu Air "+String(pinValue)+" Derajat");
   Blynk.virtualWrite(V3, 0);
   Blynk.virtualWrite(V4, 0);
   noTone(buzzer);
   
   lcd.setCursor(0, 1);
    lcd.print("Operasi Manual      ");
    lcd.setCursor(0, 2);
    lcd.print("Tinggi Air: "); 
    lcd.print(distance);
    lcd.print(" cm ");
    lcd.setCursor(0, 3);
    lcd.print("Pintu Air : "); 
    lcd.print(pinValue);
    lcd.print(" Djt  ");
  }
}