#define BLYNK_TEMPLATE_ID "TMPL6aYNmka0D"
#define BLYNK_TEMPLATE_NAME "Monitoring Air Ultrasonik"
#define BLYNK_AUTH_TOKEN "rpUJREmwQUS1IK0qDwT9W8hKoLztBml-"

#include <ESP8266WiFi.h>
#include <BlynkSimpleEsp8266.h>

char ssid[] = "znb";
char pass[] = "byylaoo0";

#define TRIG_PIN D5
#define ECHO_PIN D6
#define LED_PIN D1
#define BUZZER_PIN D2

BlynkTimer timer;

long readUltrasonicDistance() {
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  long distance = duration * 0.034 / 2;
  return distance;
}

void sendSensor() {
  long distance = readUltrasonicDistance();
  Blynk.virtualWrite(V0, distance);

  if (distance > 10) {
    digitalWrite(LED_PIN, HIGH);
    digitalWrite(BUZZER_PIN, HIGH);
    Blynk.virtualWrite(V1, 1);
    Blynk.virtualWrite(V2, 1);
  } else {
    digitalWrite(LED_PIN, LOW);
    digitalWrite(BUZZER_PIN, LOW);
    Blynk.virtualWrite(V1, 0);
    Blynk.virtualWrite(V2, 0);
  }
}

void setup() {
  Serial.begin(115200);
  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
  pinMode(LED_PIN, OUTPUT);
  pinMode(BUZZER_PIN, OUTPUT);
  timer.setInterval(2000L, sendSensor);
}

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

// Komponen: ESP8266 (NodeMCU), Ultrasonic Sensor HC-SR04, LED (simulasi pompa), Buzzer, Resistor, Breadboard dan kabel jumper

// Koneksi: VCC HC-SR04 → 3.3V, GND HC-SR04 → GND, TRIG HC-SR04 → D5, ECHO HC-SR04 → D6, LED (pompa) anoda → D1, katoda → resistor → GND, Buzzer + → D2, – → GND