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kode_arduino.ino

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+#include <WiFi.h>
+#include <Firebase_ESP_Client.h>
+#include <esp_task_wdt.h>
+
+// ================= WIFI =================
+#define WIFI_SSID "Angga"
+#define WIFI_PASSWORD "upinipinupin"
+
+// ================= FIREBASE =================
+#define DATABASE_URL "https://tomat2-default-rtdb.asia-southeast1.firebasedatabase.app"
+#define DATABASE_SECRET "EsSGEME2IMqmVvWx2VZLkLSKAnJ4Meg6AblUOyxO"
+
+FirebaseData fbdo;
+FirebaseAuth auth;
+FirebaseConfig config;
+
+// ================= PIN =================
+#define SOIL_PIN 34
+#define PIR_PIN 27
+#define RELAY_PIN 26
+#define BUZZER_PIN 25
+
+// ================= KALIBRASI =================
+#define SOIL_DRY 2400
+#define SOIL_WET 1100
+
+// ================= GLOBAL =================
+volatile bool pirFlag = false;
+volatile unsigned long lastInterrupt = 0;
+
+int pirState = 0;
+unsigned long pirHoldTime = 0;
+const int pirActiveDuration = 3000;
+
+int lastMoist = -1;
+int lastPir = -1;
+int lastPump = -1;
+
+int lastPumpState = 0;
+
+String mode = "auto";
+int pumpManual = 0;
+
+int minMoist = 60;
+int maxMoist = 80;
+
+unsigned long lastSend = 0;
+unsigned long lastRead = 0;
+
+const int sendInterval = 10000;
+const int readInterval = 7000;
+
+// ================= OFFLINE =================
+bool offlineMode = false;
+
+unsigned long lastOfflineCheck = 0;
+const int offlineCheckInterval = 10000;
+
+// ================= BUZZER =================
+unsigned long lastBuzz = 0;
+unsigned long buzzerStart = 0;
+
+bool buzzerActive = false;
+
+const int buzzCooldown = 5000;
+const int buzzerDuration = 2000;
+
+bool sendPirNow = false;
+
+// ================= ISR =================
+void IRAM_ATTR pirISR() {
+
+  if (millis() - lastInterrupt > 200) {
+
+    pirFlag = true;
+    lastInterrupt = millis();
+  }
+}
+
+// ================= WIFI =================
+void connectWiFi() {
+
+  static unsigned long lastAttempt = 0;
+
+  // sudah connect
+  if (WiFi.status() == WL_CONNECTED) {
+    return;
+  }
+
+  // retry tiap 10 detik
+  if (millis() - lastAttempt < 10000) {
+    return;
+  }
+
+  lastAttempt = millis();
+
+  Serial.println("Connecting WiFi...");
+
+  WiFi.disconnect();
+
+  WiFi.begin(WIFI_SSID, WIFI_PASSWORD);
+}
+
+// ================= OFFLINE CHECK =================
+void checkOfflineMode() {
+
+  // cek tiap 10 detik
+  if (millis() - lastOfflineCheck < offlineCheckInterval) {
+    return;
+  }
+
+  lastOfflineCheck = millis();
+
+  // ===== WIFI PUTUS =====
+  if (WiFi.status() != WL_CONNECTED) {
+
+    if (!offlineMode) {
+      Serial.println("⚠️ OFFLINE MODE");
+    }
+
+    offlineMode = true;
+    return;
+  }
+
+  // ===== WIFI NORMAL =====
+  if (offlineMode) {
+    Serial.println("✅ BACK ONLINE");
+  }
+
+  offlineMode = false;
+}
+
+// ================= SAFE SEND =================
+bool sendData(FirebaseJson &json) {
+
+  // jangan kirim saat offline
+  if (
+    offlineMode ||
+    WiFi.status() != WL_CONNECTED
+  ) {
+    return false;
+  }
+
+  // firebase belum ready
+  if (!Firebase.ready()) {
+    return false;
+  }
+
+  // kirim 1x saja
+  return Firebase.RTDB.setJSON(
+    &fbdo,
+    "/sensor",
+    &json
+  );
+}
+
+// ================= SETUP =================
+void setup() {
+
+  Serial.begin(115200);
+
+  pinMode(PIR_PIN, INPUT);
+
+  pinMode(RELAY_PIN, OUTPUT);
+  pinMode(BUZZER_PIN, OUTPUT);
+
+  // relay OFF
+  digitalWrite(RELAY_PIN, HIGH);
+
+  digitalWrite(BUZZER_PIN, LOW);
+
+  analogSetAttenuation(ADC_11db);
+
+  attachInterrupt(
+    digitalPinToInterrupt(PIR_PIN),
+    pirISR,
+    RISING
+  );
+
+  // ===== WIFI =====
+  WiFi.mode(WIFI_STA);
+  WiFi.setSleep(false);
+
+  connectWiFi();
+
+  WiFi.setAutoReconnect(true);
+  WiFi.persistent(true);
+
+  // ===== FIREBASE =====
+  config.database_url = DATABASE_URL;
+
+  config.signer.tokens.legacy_token =
+    DATABASE_SECRET;
+
+  Firebase.begin(&config, &auth);
+
+  Firebase.reconnectWiFi(true);
+
+  fbdo.setBSSLBufferSize(2048, 512);
+
+  config.timeout.serverResponse = 3000;
+
+  // ===== WATCHDOG =====
+  esp_task_wdt_config_t wdt_config = {
+    .timeout_ms = 10000,
+    .idle_core_mask = (1 << portNUM_PROCESSORS) - 1,
+    .trigger_panic = true
+  };
+
+  esp_task_wdt_init(&wdt_config);
+
+  esp_task_wdt_add(NULL);
+
+  Serial.println("System Ready");
+}
+
+// ================= LOOP =================
+void loop() {
+
+  esp_task_wdt_reset();
+
+  // ===== CHECK ONLINE/OFFLINE =====
+  checkOfflineMode();
+
+  // ===== RECONNECT WIFI =====
+  connectWiFi();
+
+  // ================= PIR =================
+  if (pirFlag) {
+
+    pirFlag = false;
+
+    Serial.println("⚠️ GERAKAN!");
+
+    pirState = 1;
+
+    pirHoldTime = millis();
+
+    sendPirNow = true;
+
+    // ===== BUZZER =====
+    if (millis() - lastBuzz > buzzCooldown) {
+
+      lastBuzz = millis();
+
+      buzzerStart = millis();
+
+      buzzerActive = true;
+    }
+  }
+
+  // ================= BUZZER =================
+  if (buzzerActive) {
+
+    static unsigned long lastToggle = 0;
+    static bool state = false;
+
+    if (millis() - lastToggle > 100) {
+
+      lastToggle = millis();
+
+      state = !state;
+
+      digitalWrite(BUZZER_PIN, state);
+    }
+
+    // ===== STOP BUZZER =====
+    if (millis() - buzzerStart > buzzerDuration) {
+
+      buzzerActive = false;
+
+      digitalWrite(BUZZER_PIN, LOW);
+    }
+  }
+
+  // ================= RESET PIR =================
+  if (
+    pirState == 1 &&
+    millis() - pirHoldTime > pirActiveDuration
+  ) {
+
+    pirState = 0;
+  }
+
+  // ================= SENSOR =================
+  int soilRaw = analogRead(SOIL_PIN);
+
+  int moisture = map(
+    soilRaw,
+    SOIL_DRY,
+    SOIL_WET,
+    0,
+    100
+  );
+
+  moisture = constrain(moisture, 0, 100);
+
+  // ==================================================
+  // ================= LOGIKA POMPA ===================
+  // ==================================================
+
+  int pumpState = lastPumpState;
+
+  // ===== OFFLINE =====
+  if (offlineMode) {
+
+    // paksa AUTO lokal
+    if (moisture < minMoist) {
+
+      pumpState = 1;
+
+    } else if (moisture > maxMoist) {
+
+      pumpState = 0;
+    }
+
+  } else {
+
+    // ===== MODE NORMAL =====
+    if (mode == "manual") {
+
+      pumpState = pumpManual;
+
+    } else {
+
+      if (moisture < minMoist) {
+
+        pumpState = 1;
+
+      } else if (moisture > maxMoist) {
+
+        pumpState = 0;
+      }
+    }
+  }
+
+  lastPumpState = pumpState;
+
+  // relay active LOW
+  digitalWrite(
+    RELAY_PIN,
+    pumpState ? LOW : HIGH
+  );
+
+  // ================= DEBUG =================
+  Serial.printf(
+    "OFF:%d Moist:%d Pump:%d PIR:%d WiFi:%d\n",
+    offlineMode,
+    moisture,
+    pumpState,
+    pirState,
+    WiFi.status()
+  );
+
+  // ==================================================
+  // ============== FIREBASE DI BAWAH =================
+  // ==================================================
+
+  // ================= READ FIREBASE =================
+  if (
+    !offlineMode &&
+    millis() - lastRead > readInterval
+  ) {
+
+    if (
+      WiFi.status() == WL_CONNECTED &&
+      Firebase.ready()
+    ) {
+
+      Firebase.RTDB.getString(
+        &fbdo,
+        "/control/mode"
+      );
+
+      if (fbdo.dataType() == "string") {
+        mode = fbdo.stringData();
+      }
+
+      Firebase.RTDB.getInt(
+        &fbdo,
+        "/control/pump"
+      );
+
+      if (fbdo.dataType() == "int") {
+        pumpManual = fbdo.intData();
+      }
+
+      Firebase.RTDB.getInt(
+        &fbdo,
+        "/config/min_moisture"
+      );
+
+      if (fbdo.dataType() == "int") {
+        minMoist = fbdo.intData();
+      }
+
+      Firebase.RTDB.getInt(
+        &fbdo,
+        "/config/max_moisture"
+      );
+
+      if (fbdo.dataType() == "int") {
+        maxMoist = fbdo.intData();
+      }
+    }
+
+    lastRead = millis();
+  }
+
+  // ================= PIR REALTIME =================
+  if (sendPirNow) {
+
+    // reset flag dulu
+    sendPirNow = false;
+
+    // hanya kirim kalau online
+    if (!offlineMode) {
+
+      FirebaseJson json;
+
+      json.set("moisture", moisture);
+      json.set("pir", 1);
+      json.set("pump", pumpState);
+
+      if (sendData(json)) {
+        Serial.println("🚀 PIR SENT");
+      }
+    }
+  }
+
+  // ================= PERIODIC SEND =================
+  if (
+    !offlineMode &&
+    millis() - lastSend > sendInterval
+  ) {
+
+    if (
+      abs(moisture - lastMoist) > 3 ||
+      pirState != lastPir ||
+      pumpState != lastPump
+    ) {
+
+      FirebaseJson json;
+
+      json.set("moisture", moisture);
+      json.set("pir", pirState);
+      json.set("pump", pumpState);
+
+      if (sendData(json)) {
+
+        Serial.printf(
+          "SEND → M:%d PIR:%d P:%d\n",
+          moisture,
+          pirState,
+          pumpState
+        );
+      }
+
+      lastMoist = moisture;
+      lastPir = pirState;
+      lastPump = pumpState;
+    }
+
+    lastSend = millis();
+  }
+
+  delay(20);
+}