#include <WiFi.h>
#include <HTTPClient.h>
#include <DHT.h>

#define DHTPIN 13
#define DHTTYPE DHT22
#define LEDPIN 12
#define TEMP_THRESHOLD 30.0 // batas suhu (°C)

DHT dht(DHTPIN, DHTTYPE);

const char* ssid = "Wokwi-GUEST";
const char* password = "";
const char* token = "sV98HRKT1UmfnIR8cCaeH3K_SRW6m1MZ";
const char* server = "https://sgp1.blynk.cloud";

void setup() {
  Serial.begin(115200);
  pinMode(LEDPIN, OUTPUT);
  digitalWrite(LEDPIN, LOW);

  WiFi.begin(ssid, password);
  Serial.print("Connecting to WiFi");
  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.println("\nWiFi connected");

  dht.begin();
}

void loop() {
  if (WiFi.status() != WL_CONNECTED) {
    Serial.println("WiFi disconnected, reconnecting...");
    WiFi.reconnect();
    delay(5000);
    return;
  }

  float suhu = dht.readTemperature();
  float kelembapan = dht.readHumidity();

  if (isnan(suhu) || isnan(kelembapan)) {
    Serial.println("Sensor Error");
    delay(2000);
    return;
  }

  // Kirim data suhu & kelembapan ke Blynk
  HTTPClient http;
  String urlSend = String(server) +
    "/external/api/batch/update?token=" + token +
    "&V0=" + String(suhu, 2) +
    "&V1=" + String(kelembapan, 2);

  http.begin(urlSend);
  int httpCodeSend = http.GET();
  if (httpCodeSend == 200) {
    Serial.println("Data sensor terkirim ke Blynk");
  } else {
    Serial.print("Gagal kirim data, HTTP code: ");
    Serial.println(httpCodeSend);
  }
  http.end();

  // Periksa apakah suhu melebihi ambang batas → alarm ON
  bool alarmActive = suhu > TEMP_THRESHOLD;
  if (alarmActive) {
    Serial.println("SUHU MELEBIHI BATAS, ALARM DIAKTIFKAN! ");
    digitalWrite(LEDPIN, HIGH);
  } else {
    Serial.println("LED DIMATIKAN (tidak ada alarm)");
    digitalWrite(LEDPIN, LOW);
  }

  // Ambil status manual dari Blynk (V2) untuk override alarm
  String urlGet = String(server) + "/external/api/get?token=" + token + "&pin=V2";
  http.begin(urlGet);
  int httpCodeGet = http.GET();

  if (httpCodeGet == 200) {
    String payload = http.getString();
    payload.trim();

  } else {
    Serial.print("Gagal baca status manual, HTTP code: ");
    Serial.println(httpCodeGet);
  }
  http.end();

  Serial.print("Suhu: ");
  Serial.print(suhu);
  Serial.println(" °C");

  Serial.print("Kelembapan: ");
  Serial.print(kelembapan);
  Serial.println(" %");
  Serial.println("  ");

  delay(5000); // Update setiap 5 detik
}