#include <WiFi.h>
#include <ThingSpeak.h>


// Konfigurasi Wi-Fi
const char *ssid = "Wokwi-GUEST";
const char *password = "";

// Inisialisasi koneksi Wi-Fi
WiFiClient client;

const char *thingSpeakApiKey = "9Z95F8Z8K9P4KMFC";
unsigned long thingSpeakChannelId = 2377565;
// unsigned long myChannelNumber = 2359833;
// const char * myWriteAPIKey = "6VI3RTOY7E9CQN7N";
int statusCode;


// Pin sensor ultrasonik HC-SR04
const int trigPin = 13;
const int echoPin = 14;

void setup() {
  Serial.begin(115200);

  // Koneksi ke Wi-Fi
  WiFi.begin(ssid, password);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("Connected to WiFi");

  // Inisialisasi ThingSpeak
  ThingSpeak.begin(client);

  pinMode(echoPin, INPUT_PULLUP);
  pinMode(trigPin, OUTPUT);
}
  
  
void loop() {
// Mengukur jarak dengan sensor ultrasonik
  long duration, distance;
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  duration = pulseIn(echoPin, HIGH);
  distance = (duration / 2) * 0.0343;

  if (distance < 100) {
    // Mengonversi jarak menjadi persentase
    int percentage = map(distance, 0, 20, 100, 0);

    // Mengunggah data ke ThingSpeak hanya jika jarak sesuai
    ThingSpeak.writeField(thingSpeakChannelId, 1, percentage, thingSpeakApiKey);

    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.print(" cm, Level Air: ");
    Serial.print(percentage);
    Serial.println("%");
  } else {
    Serial.println("Jarak melebihi 20 cm. Tangki Penampungan Air Habis.");
  }

  delay(5000); // Delay 5 detik sebelum mengukur ulang
}