#define BLYNK_PRINT Serial
#define BLYNK_TEMPLATE_ID "TMPLVEkmXYd6"
#define BLYNK_DEVICE_NAME "ESP32 02"
// #define BLYNK_DEVICE_NAME "Smart City"
// #define BLYNK_AUTH_TOKEN "TCQMcklyJ3tFUv6D3SyEUYszZjKM5pG-"

#define ECHO_PIN 4
#define TRIG_PIN 2
#define LED_HIJAU 13
#define LED_KUNING 12
#define LED_MERAH 14

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

char auth[] = "TCQMcklyJ3tFUv6D3SyEUYszZjKM5pG-";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

String level;
int g, y, r;

float readDistanceCM() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  int duration = pulseIn(ECHO_PIN, HIGH);
  return duration * 0.034 / 2;
}

void setup() {
  // put your setup code here, to run once:
  Serial.begin(115200);
  Serial.println("Hello, ESP32!");
  Blynk.begin(auth, ssid, pass);

  pinMode(LED_BUILTIN, OUTPUT);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_HIJAU, OUTPUT);
  pinMode(LED_KUNING, OUTPUT);
  pinMode(LED_MERAH, OUTPUT);
}

void loop() {
  float distance = readDistanceCM();

  Serial.print("Jarak: ");
  Serial.println(distance);
  Blynk.virtualWrite(V0, distance);


  if (distance >= 100){
    digitalWrite(LED_HIJAU, HIGH);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, LOW);
    level = "Aman";
    g = 1;
    y = 0;
    r = 0;
  } else if (distance < 100 && distance >= 50){
    digitalWrite(LED_HIJAU, LOW);
    digitalWrite(LED_KUNING, HIGH);
    digitalWrite(LED_MERAH, LOW);
    level = "Siaga";
    g = 0;
    y = 1;
    r = 0;
  } else if (distance < 50){
    digitalWrite(LED_HIJAU, LOW);
    digitalWrite(LED_KUNING, LOW);
    digitalWrite(LED_MERAH, HIGH);
    level = "Banjir";
    g = 0;
    y = 0;
    r = 1;
  };

  Serial.println(level);
  Blynk.virtualWrite(V4, level);
  Blynk.virtualWrite(V3, g);
  Blynk.virtualWrite(V2, y);
  Blynk.virtualWrite(V1, r);

  Blynk.run();
  // put your main code here, to run repeatedly:
  delay(100); // this speeds up the simulation
}