#define BLYNK_TEMPLATE_ID "TMPL6TrMM9cQl"
#define BLYNK_TEMPLATE_NAME "Sistem Monitoring DHT22"
#define BLYNK_AUTH_TOKEN "cPkxQRE4DaE6foHTronw2LPzHKFjX-UQ"

#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <DHT.h>
#include <Wire.h>
#include <Adafruit_GFX.h>
#include <Adafruit_SSD1306.h>

// ================= WIFI =================
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// ================= PIN =================
#define DHTPIN 15
#define DHTTYPE DHT22
#define BUZZER 23

// ================= SENSOR =================
DHT dht(DHTPIN, DHTTYPE);
BlynkTimer timer;

// ================= OLED =================
#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, -1);

// ================= DATA =================
String statusText = "";
int buzzerMode = 0; // 0=off, 1=warning, 2=danger

// ================= SETUP =================
void setup() {
  Serial.begin(115200);

  pinMode(BUZZER, OUTPUT);
  dht.begin();

  Wire.begin(13, 14);

  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println("OLED gagal!");
    while (1);
  }

  display.clearDisplay();

  Blynk.begin(BLYNK_AUTH_TOKEN, ssid, pass);

  timer.setInterval(2000L, kirimData);
}

// ================= LOOP =================
void loop() {
  Blynk.run();
  timer.run();
}

// ================= FUNCTION =================
void kirimData() {
  float t = dht.readTemperature();
  float h = dht.readHumidity();

  if (isnan(t) || isnan(h)) return;

  Blynk.virtualWrite(V1, t);
  Blynk.virtualWrite(V2, h);

  // ================= LOGIKA LEVEL =================
  if (t < 25) {
    buzzerMode = 0;
    statusText = "AMAN";
    noTone(BUZZER);
  }
  else if (t <= 30) {
    buzzerMode = 1;
    statusText = "WARNING";
    tone(BUZZER, 800);
    delay(200);
    noTone(BUZZER);
  }
  else {
    buzzerMode = 2;
    statusText = "BAHAYA!";
    tone(BUZZER, 1500);
  }

  // ================= OLED =================
  display.clearDisplay();
  display.setTextSize(1);
  display.setTextColor(WHITE);

  display.setCursor(0,0);
  display.print("SMART ALARM SYSTEM");

  display.setCursor(0,15);
  display.print("Suhu: ");
  display.print(t);
  display.print(" C");

  display.setCursor(0,30);
  display.print("Hum : ");
  display.print(h);
  display.print(" %");

  display.setCursor(0,45);
  display.print("Status: ");
  display.print(statusText);

  display.display();

  // DEBUG
  Serial.print("T: ");
  Serial.print(t);
  Serial.print(" | Status: ");
  Serial.println(statusText);
}