diff --git a/ecomonitoring.ino b/ecomonitoring.ino
new file mode 100644
index 0000000..c8f7e9c
--- /dev/null
+++ b/ecomonitoring.ino
@@ -0,0 +1,260 @@
+#include <WiFi.h>
+#include <WiFiManager.h>
+#include <Firebase_ESP_Client.h>
+#include <DHT.h>
+#include <Wire.h>
+#include <LiquidCrystal_I2C.h>
+#include <HTTPClient.h>
+#include <WiFiClientSecure.h>
+#include <time.h>
+
+// === KREDENSIAL FIREBASE ===
+#define API_KEY "AIzaSyDiYpuUPQUvK-1fOztrblPKKn3cMTDrlXU"
+#define DATABASE_URL "https://ecomoni-dc5fd-default-rtdb.firebaseio.com/"
+#define LEGACY_TOKEN "Sd9aMsdVYzEV7QkvaJh79j4kd3vaCClvBAC78yjn"
+
+// === PIN SENSOR DAN KOMPONEN ===
+#define DHTPIN 4
+#define DHTTYPE DHT22
+#define RAIN_SENSOR_PIN 5
+#define LDR_PIN 34
+#define LED_STATUS 26
+#define BUTTON_PIN 27
+
+// === OBJEK & VARIABEL GLOBAL ===
+FirebaseData fbdo;
+FirebaseAuth auth;
+FirebaseConfig config;
+DHT dht(DHTPIN, DHTTYPE);
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+
+unsigned long lastUpdate = 0;
+unsigned long interval = 5000;
+unsigned long lastHistorySend = 0;
+unsigned long intervalHistory = 300000;
+int displayPage = 0;
+bool isOfflineMode = false;
+
+void setupNTP() {
+  configTime(7 * 3600, 0, "pool.ntp.org", "time.nist.gov");
+  struct tm timeinfo;
+  Serial.print("Sinkronisasi waktu NTP...");
+  while (!getLocalTime(&timeinfo)) {
+    Serial.print(".");
+    delay(500);
+  }
+  Serial.println(" [BERHASIL]");
+  Serial.print("Waktu sekarang: ");
+  Serial.println(&timeinfo, "%Y-%m-%d %H:%M:%S");
+}
+
+void updateIntervalHistoryFromFirebase() {
+  if (Firebase.RTDB.getInt(&fbdo, "/threshold/interval_history")) {
+    if (fbdo.dataType() == "int") {
+      int interval_minutes = fbdo.intData();
+      intervalHistory = interval_minutes * 60000UL;
+      Serial.print("Interval diperbarui: ");
+      Serial.println(intervalHistory);
+    }
+  } else {
+    Serial.print("Gagal mengambil interval_history: ");
+    Serial.println(fbdo.errorReason());
+  }
+}
+
+void setup() {
+  Serial.begin(115200);
+  dht.begin();
+  Wire.begin(22, 21);
+  lcd.init();
+  lcd.backlight();
+
+  pinMode(RAIN_SENSOR_PIN, INPUT);
+  pinMode(LED_STATUS, OUTPUT);
+  pinMode(BUTTON_PIN, INPUT_PULLUP);
+  digitalWrite(LED_STATUS, LOW);
+
+  lcd.setCursor(0, 0);
+  lcd.print("Menghubungkan...");
+
+  WiFiManager wm;
+  wm.setTimeout(60); // 1 menit
+
+  if (!wm.autoConnect("EcoMonitor-Setup")) {
+    Serial.println("Gagal konek WiFi. Mode offline.");
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print("Mode Offline");
+    isOfflineMode = true;
+    delay(2000);
+  } else {
+    Serial.println("WiFi Terhubung!");
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print("WiFi Terhubung");
+    digitalWrite(LED_STATUS, HIGH);
+    delay(2000);
+
+    setupNTP();
+
+    config.api_key = API_KEY;
+    config.database_url = DATABASE_URL;
+    config.signer.tokens.legacy_token = LEGACY_TOKEN;
+    Firebase.begin(&config, &auth);
+    Firebase.reconnectWiFi(true);
+    updateIntervalHistoryFromFirebase();
+
+    lcd.clear();
+  }
+}
+
+void loop() {
+  // === Tombol untuk masuk mode konfigurasi WiFi (bisa online/offline) ===
+  if (digitalRead(BUTTON_PIN) == LOW) {
+    Serial.println("Tombol ditekan. Masuk konfigurasi WiFi...");
+    lcd.clear();
+    lcd.setCursor(0, 0);
+    lcd.print("Config WiFi...");
+    delay(1000);
+
+    WiFiManager wm;
+    wm.resetSettings();           // Reset kredensial WiFi
+    wm.setTimeout(120);           // Timeout 2 menit
+    wm.startConfigPortal("EcoMonitor-Setup");
+    ESP.restart();                // Restart setelah config
+  }
+
+  // === Mode Offline ===
+  if (isOfflineMode) {
+    float suhu = dht.readTemperature();
+    float kelembaban = dht.readHumidity();
+    int hujan_status = digitalRead(RAIN_SENSOR_PIN);
+    int ldr_raw = analogRead(LDR_PIN);
+    int lux = map(ldr_raw, 0, 4095, 1000, 1);
+    lux = constrain(lux, 1, 1000);
+    String kondisi_hujan = (hujan_status == 1) ? "Cerah" : "Hujan";
+
+    lcd.clear();
+    switch (displayPage) {
+      case 0:
+        lcd.setCursor(0, 0);
+        lcd.print("    Ecomonitor");
+        break;
+      case 1:
+        lcd.setCursor(0, 0);
+        lcd.print("Suhu:");
+        lcd.print(suhu, 0);
+        lcd.print((char)223);
+        lcd.print("C");
+        lcd.setCursor(0, 1);
+        lcd.print("Kelembaban:");
+        lcd.print(kelembaban, 0);
+        lcd.print("%");
+        break;
+      case 2:
+        lcd.setCursor(0, 0);
+        lcd.print("Cahaya:");
+        lcd.print(lux);
+        lcd.print(" Lux");
+        lcd.setCursor(0, 1);
+        lcd.print("Cuaca:");
+        lcd.print(kondisi_hujan);
+        break;
+    }
+    displayPage = (displayPage + 1) % 3;
+    delay(3000);
+    return;
+  }
+
+  // === Mode Online ===
+  if (millis() - lastUpdate >= interval && Firebase.ready()) {
+    lastUpdate = millis();
+
+    float suhu = dht.readTemperature();
+    float kelembabanMentah = dht.readHumidity();
+    float kelembaban = kelembabanMentah * 0.51;
+    kelembaban = constrain(kelembaban, 0, 100);
+    int hujan_status = digitalRead(RAIN_SENSOR_PIN);
+    int ldr_raw = analogRead(LDR_PIN);
+    int lux = map(ldr_raw, 0, 4095, 1000, 1);
+    lux = constrain(lux, 1, 1000);
+    String kondisi_hujan = (hujan_status == 1) ? "Cerah" : "Hujan";
+
+    Serial.printf("Suhu: %.2f °C\n", suhu);
+    Serial.printf("Kelembaban: %.2f %%\n", kelembaban);
+    Serial.printf("Cuaca: %s\n", kondisi_hujan.c_str());
+    Serial.printf("Cahaya: %d lux\n", lux);
+
+    lcd.clear();
+    switch (displayPage) {
+      case 0:
+        lcd.setCursor(0, 0);
+        lcd.print("    Ecomonitor");
+        break;
+      case 1:
+        lcd.setCursor(0, 0);
+        lcd.print("Suhu:");
+        lcd.print(suhu, 0);
+        lcd.print((char)223);
+        lcd.print("C");
+        lcd.setCursor(0, 1);
+        lcd.print("Kelembaban:");
+        lcd.print(kelembaban, 0);
+        lcd.print("%");
+        break;
+      case 2:
+        lcd.setCursor(0, 0);
+        lcd.print("Cahaya:");
+        lcd.print(lux);
+        lcd.print(" Lux");
+        lcd.setCursor(0, 1);
+        lcd.print("Cuaca:");
+        lcd.print(kondisi_hujan);
+        break;
+    }
+    displayPage = (displayPage + 1) % 3;
+    delay(3000);
+
+    Firebase.RTDB.setFloat(&fbdo, "/sensor/suhu", suhu);
+    Firebase.RTDB.setFloat(&fbdo, "/sensor/kelembaban", kelembaban);
+    Firebase.RTDB.setString(&fbdo, "/sensor/sensor_hujan", kondisi_hujan);
+    Firebase.RTDB.setInt(&fbdo, "/sensor/intensitas_cahaya", lux);
+
+    if (millis() - lastHistorySend >= intervalHistory) {
+      lastHistorySend = millis();
+      updateIntervalHistoryFromFirebase();
+
+      time_t now;
+      struct tm timeinfo;
+      if (!getLocalTime(&timeinfo)) {
+        Serial.println("Gagal mendapatkan waktu!");
+        return;
+      }
+
+      char isoTime[30];
+      strftime(isoTime, sizeof(isoTime), "%Y-%m-%dT%H:%M:%S+07:00", &timeinfo);
+
+      String jsonPayload = "{";
+      jsonPayload += "\"intensitas_cahaya\":" + String(lux) + ",";
+      jsonPayload += "\"kelembaban\":" + String(kelembaban) + ",";
+      jsonPayload += "\"sensor_hujan\":" + String((hujan_status == 0) ? "true" : "false") + ",";
+      jsonPayload += "\"suhu\":" + String(suhu) + ",";
+      jsonPayload += "\"timestamp\":\"" + String(isoTime) + "\"}";
+
+      WiFiClientSecure client;
+      client.setInsecure();
+
+      HTTPClient http;
+      http.begin(client, "https://ecomonitor-api.vercel.app/api/kirimdata");
+      http.addHeader("Content-Type", "application/json");
+      int httpResponseCode = http.POST(jsonPayload);
+
+      if (httpResponseCode > 0) {
+        Serial.printf("Data history terkirim (%d): %s\n", httpResponseCode, http.getString().c_str());
+      } else {
+        Serial.printf("Gagal kirim data history: %s\n", http.errorToString(httpResponseCode).c_str());
+      }
+      http.end();
+    }
+  }
+}
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