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

// CONNECT COMMAND
const char* WIFI_NAME = "Wokwi-GUEST";
const char* WIFI_PASSWORD = "";
const int myChannelNumber = 2600499;
const char* myApiKey = "7WH7SUHAIII6OAJH";
const char* server = "api.thingspeak.com";

WiFiClient client;
DHT dht(15, DHT22);  // Inisialisasi DHT dengan pin dan tipe yang benar

#define DHT_PIN 15
#define PULSE_PIN 35

void setup() {
  Serial.begin(115200);
  dht.begin();  // Memulai sensor DHT

  WiFi.begin(WIFI_NAME, WIFI_PASSWORD);
  while (WiFi.status() != WL_CONNECTED) {
    delay(1000);
    Serial.println("Connecting to WiFi...");
  }
  Serial.println("WiFi connected!");
  Serial.println("Local IP: " + String(WiFi.localIP()));
  WiFi.mode(WIFI_STA);
  ThingSpeak.begin(client);
}

void loop() {
  // Membaca suhu dan kelembaban dari sensor DHT
  float h = dht.readHumidity();
  float t = dht.readTemperature();

  // Memeriksa apakah pembacaan valid
  if (isnan(h) || isnan(t)) {
    Serial.println("Failed to read from DHT sensor!");
    return;
  }

  // Membaca nilai pulse dari sensor pulse
  int16_t pulseValue = analogRead(PULSE_PIN);

  // Mengonversi nilai pulse ke tegangan
  float voltage = pulseValue * (3.3 / 4095.0); // Sesuaikan jika menggunakan tegangan referensi yang berbeda

  // Menghitung detak jantung dari tegangan (perhitungan contoh, sesuaikan jika diperlukan)
  int heartRate = (voltage / 3.3) * 675;

  // Mencetak nilai sensor ke serial monitor
  Serial.print("Heart Rate: ");
  Serial.print(heartRate);
  Serial.print(" BPM, Temp: ");
  Serial.print(t);
  Serial.print(" °C, Humidity: ");
  Serial.print(h);
  Serial.println(" %");

  // Mengirim data ke ThingSpeak
  ThingSpeak.setField(1, t);
  ThingSpeak.setField(2, h);
  ThingSpeak.setField(3, heartRate);

  int x = ThingSpeak.writeFields(myChannelNumber, myApiKey);
  if (x == 200) {
    Serial.println("Channel update successful.");
  } else {
    Serial.println("Problem updating channel. HTTP error code " + String(x));
  }

  // Menunggu sebelum membaca sensor lagi
  delay(60000); // 1 menit delay antara pembaruan
}