#define BLYNK_TEMPLATE_ID "TMPL6KoAp4pr3"
#define BLYNK_TEMPLATE_NAME "Deteksi Ketinggian Air"
#define BLYNK_AUTH_TOKEN "bplsLPRZsPMZAM17Z0iXzdwhBNGO2QmI"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

#define BLYNK_PRINT Serial
#define LED_PIN 2
#define ECHO_PIN 4
#define TRIG_PIN 5
#define SOUND_PIN 12

unsigned long previousMillis = 0;
const long interval = 3000;
bool pompa_state = false;

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

void setup() {
  Serial.begin(115200);
  pinMode(LED_PIN, OUTPUT);
  pinMode(SOUND_PIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  Blynk.begin(auth, ssid, pass);
}

bool isFirstConnect = true;

BLYNK_CONNECTED(){
  if(isFirstConnect){
    Blynk.syncAll();
    isFirstConnect = false;
  }
}

BLYNK_WRITE(V1){
  int LED_SWITCH=param.asInt();
  digitalWrite(LED_PIN, LED_SWITCH);
  if(LED_SWITCH == 1){
    pompa_state = true;
  }else{
    pompa_state = false;
  }
}

BLYNK_WRITE(V2){
  int SOUND_SWITCH=param.asInt();
  tone(SOUND_PIN, SOUND_SWITCH * 200);
}

void loop(){
  Blynk.run();
  // sinyal trigger ultrasonic sensor
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  // mengukur durasi pulsa dan konversi ke jarak
  float pulse_duration = pulseIn(ECHO_PIN, HIGH);
  float distance_cm = 0.017 * pulse_duration;
  // Misal jarak dari dasar sungai ke ultrasonic adalah 4 meter;
  float ketinggian_cm = 400 - distance_cm;
  Serial.print("Ketinggian air: ");
  Serial.print(ketinggian_cm);
  Serial.println("cm");
  // Mengirim data ke blynk
  Blynk.virtualWrite(V0, ketinggian_cm);
  // If Else condition untuk level air
  if(ketinggian_cm <= 100){
    normal_level();
  }else if(ketinggian_cm >= 300 && ketinggian_cm < 375){
    warning_level();
  }else if(ketinggian_cm >= 375){

    bahaya_level();
  }
  delay(1000);
}

void normal_level(){
  Serial.println("Level air normal!");
  tone(SOUND_PIN, 0);
  digitalWrite(LED_PIN, LOW);
}

void warning_level(){
  Serial.println("Level air warning!");
  if(pompa_state == false){
    digitalWrite(LED_PIN, LOW);
  }
  tone(SOUND_PIN, 200);
  delay(1000);
  tone(SOUND_PIN, 0);
  delay(3000);
}

void bahaya_level(){
  Serial.println("Level air berbahaya!");
  if(pompa_state == false){
    digitalWrite(LED_PIN, LOW);
  }
  tone(SOUND_PIN, 200);
  digitalWrite(LED_PIN, HIGH);
}