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#include <WiFi.h>
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#include <HTTPClient.h>
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#include <DHT.h>
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#include <Adafruit_Fingerprint.h>
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#include <ArduinoJson.h>
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// --- Pin & Sensor ---
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#define DHTPIN 32
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#define DHTTYPE DHT11
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#define MQ2_PIN 34
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#define LDR_PIN 35
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#define RELAY_SENSOR_PIN 25
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#define RELAY_FINGERPRINT_PIN 13
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#define LDR_CONTROL_PIN 23
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#define BUZZER_PIN 4
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#define BUTTON_PIN 15
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DHT dht(DHTPIN, DHTTYPE);
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HardwareSerial mySerial(2); // RX = 16, TX = 17
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Adafruit_Fingerprint finger = Adafruit_Fingerprint(&mySerial);
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// --- WiFi & Firebase ---
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const char* ssid = "Bellaa";
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const char* password = "bella0916";
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const String FIREBASE_HOST = "https://rumahoto-c7c9b-default-rtdb.firebaseio.com/";
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const String FIREBASE_AUTH = "AAIzaSyDhXwFT0yCV4lAXPyKIMcfRzbNIxVVudl8";
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// --- Mode Tombol ---
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enum ButtonMode { MODE_NONE, MODE_UNLOCK, MODE_ENROLL, MODE_RESET };
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ButtonMode currentMode = MODE_NONE;
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// --- Variabel ---
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unsigned long buttonPressTime = 0;
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bool buttonPressed = false;
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bool fiveSecondBuzzed = false;
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bool tenSecondBuzzed = false;
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unsigned long lastSensorSend = 0;
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const unsigned long SENSOR_INTERVAL = 1000;
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int threshold_ldr = 100;
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int threshold_mq2 = 100;
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int threshold_suhu = 30;
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int mq2Baseline = 300;
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bool kalibrasiSelesai = false;
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int statusPintu = 0;
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// --- Deklarasi Fungsi ---
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void handleButton();
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void modeEnrollFingerprint();
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void modeResetFingerprint();
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void cekFingerprint();
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void bacaSensor();
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void kirimStatusPintuFirebase(int status);
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void bacaThresholdFirebase();
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void kalibrasiMQ2();
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void buzzerOnce();
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uint8_t getNextAvailableID();
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uint8_t getFingerprintEnroll(uint8_t id);
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int bacaLDRRataRata(int jumlah = 10);
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void setup() {
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Serial.begin(9600);
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dht.begin();
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pinMode(RELAY_SENSOR_PIN, OUTPUT);
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pinMode(RELAY_FINGERPRINT_PIN, OUTPUT);
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pinMode(LDR_CONTROL_PIN, OUTPUT);
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pinMode(BUZZER_PIN, OUTPUT);
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pinMode(BUTTON_PIN, INPUT_PULLUP);
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digitalWrite(RELAY_SENSOR_PIN, LOW);
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digitalWrite(RELAY_FINGERPRINT_PIN, LOW);
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digitalWrite(LDR_CONTROL_PIN, LOW);
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digitalWrite(BUZZER_PIN, LOW);
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WiFi.begin(ssid, password);
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while (WiFi.status() != WL_CONNECTED) {
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delay(500);
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Serial.print(".");
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}
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Serial.println("\nWiFi Terhubung");
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mySerial.begin(57600, SERIAL_8N1, 16, 17);
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finger.begin(57600);
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if (finger.verifyPassword()) {
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Serial.println("Sensor Fingerprint terdeteksi.");
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} else {
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Serial.println("Sensor Fingerprint TIDAK terdeteksi.");
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}
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kalibrasiMQ2();
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}
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void loop() {
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handleButton();
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cekFingerprint();
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if (millis() - lastSensorSend >= SENSOR_INTERVAL) {
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lastSensorSend = millis();
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bacaThresholdFirebase();
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bacaSensor();
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}
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}
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void handleButton() {
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int state = digitalRead(BUTTON_PIN);
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unsigned long now = millis();
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if (state == LOW && !buttonPressed) {
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buttonPressed = true;
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buttonPressTime = now;
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fiveSecondBuzzed = false;
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tenSecondBuzzed = false;
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}
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if (buttonPressed) {
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unsigned long duration = now - buttonPressTime;
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if (duration >= 5000 && !fiveSecondBuzzed && duration < 10000) {
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buzzerOnce();
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fiveSecondBuzzed = true;
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}
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if (duration >= 10000 && !tenSecondBuzzed) {
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buzzerOnce();
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tenSecondBuzzed = true;
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}
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}
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if (state == HIGH && buttonPressed) {
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unsigned long duration = now - buttonPressTime;
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buttonPressed = false;
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if (duration >= 10000) {
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currentMode = MODE_RESET;
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modeResetFingerprint();
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} else if (duration >= 5000) {
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currentMode = MODE_ENROLL;
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modeEnrollFingerprint();
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} else if (duration >= 50) {
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currentMode = MODE_UNLOCK;
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statusPintu = 1;
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kirimStatusPintuFirebase(statusPintu);
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digitalWrite(RELAY_FINGERPRINT_PIN, HIGH);
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delay(5000);
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digitalWrite(RELAY_FINGERPRINT_PIN, LOW);
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statusPintu = 0;
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kirimStatusPintuFirebase(statusPintu);
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}
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currentMode = MODE_NONE;
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}
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}
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void modeEnrollFingerprint() {
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uint8_t id = getNextAvailableID();
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if (id == 0) {
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Serial.println("Semua ID fingerprint sudah terpakai!");
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return;
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}
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Serial.print("ID yang akan didaftarkan: ");
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Serial.println(id);
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unsigned long enrollStart = millis();
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const unsigned long TIMEOUT = 30000;
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bool success = false;
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while (millis() - enrollStart < TIMEOUT) {
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Serial.println("Menunggu jari...");
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if (getFingerprintEnroll(id)) {
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success = true;
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break;
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} else {
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Serial.println("Gagal, coba lagi...");
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buzzerOnce();
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}
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delay(1000);
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}
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if (success) {
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Serial.println("Pendaftaran berhasil.");
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buzzerOnce();
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} else {
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Serial.println("Pendaftaran dibatalkan (timeout).");
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for (int i = 0; i < 5; i++) {
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buzzerOnce();
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delay(100);
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}
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}
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}
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void modeResetFingerprint() {
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Serial.println("Menghapus semua fingerprint...");
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for (int i = 0; i < 5; i++) {
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buzzerOnce();
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delay(100);
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}
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for (uint8_t i = 1; i <= 127; i++) {
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finger.deleteModel(i);
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}
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Serial.println("Reset selesai.");
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}
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void cekFingerprint() {
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if (currentMode != MODE_NONE) return;
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if (finger.getImage() != FINGERPRINT_OK) return;
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if (finger.image2Tz() != FINGERPRINT_OK || finger.fingerSearch() != FINGERPRINT_OK) {
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buzzerOnce();
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return;
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}
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Serial.print("Fingerprint cocok, ID: ");
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Serial.println(finger.fingerID);
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statusPintu = 1;
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kirimStatusPintuFirebase(statusPintu);
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digitalWrite(RELAY_FINGERPRINT_PIN, HIGH);
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delay(5000);
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digitalWrite(RELAY_FINGERPRINT_PIN, LOW);
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statusPintu = 0;
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kirimStatusPintuFirebase(statusPintu);
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}
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void bacaSensor() {
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if (!kalibrasiSelesai) {
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Serial.println("Kalibrasi MQ2 belum selesai.");
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return;
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}
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float temp = dht.readTemperature();
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float hum = dht.readHumidity();
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int gasRaw = analogRead(MQ2_PIN);
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float gasPercent = mq2Baseline != 0 ? ((float)gasRaw / mq2Baseline) * 100.0 : 0.0;
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int ldrRaw = bacaLDRRataRata();
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if (isnan(temp) || isnan(hum)) {
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Serial.println("Sensor DHT11 error");
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return;
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}
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Serial.printf("Suhu: %.2f °C, Hum: %.2f%%, MQ2: %.2f, LDR (avg): %d\n", temp, hum, gasPercent, ldrRaw);
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digitalWrite(RELAY_SENSOR_PIN, temp >= threshold_suhu ? HIGH : LOW);
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digitalWrite(BUZZER_PIN, gasPercent > threshold_mq2 ? HIGH : LOW);
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digitalWrite(LDR_CONTROL_PIN, ldrRaw >= threshold_ldr ? HIGH : LOW);
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if (WiFi.status() == WL_CONNECTED) {
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HTTPClient http;
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String url = FIREBASE_HOST + "sensor.json?auth=" + FIREBASE_AUTH;
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String payload = "{\"suhu\":" + String(temp) + ",\"kelembaban\":" + String(hum) + ",\"mq2\":" + String(gasPercent) + ",\"ldr\":" + String(ldrRaw) + "}";
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http.begin(url);
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http.addHeader("Content-Type", "application/json");
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int res = http.PATCH(payload);
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Serial.println(res > 0 ? "Data sensor terkirim!" : "Gagal kirim data sensor");
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http.end();
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int statusLampu = digitalRead(LDR_CONTROL_PIN);
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int statusBuzzer = digitalRead(BUZZER_PIN);
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String statusPayload = "{\"lampu\":" + String(statusLampu) + ",\"pintu\":" + String(statusPintu) + ",\"buzzer\":" + String(statusBuzzer) + "}";
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String statusUrl = FIREBASE_HOST + "status.json?auth=" + FIREBASE_AUTH;
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http.begin(statusUrl);
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http.addHeader("Content-Type", "application/json");
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int statusRes = http.PATCH(statusPayload);
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Serial.println(statusRes > 0 ? "Status terkirim!" : "Gagal kirim status");
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http.end();
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}
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}
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void kirimStatusPintuFirebase(int status) {
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if (WiFi.status() == WL_CONNECTED) {
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HTTPClient http;
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String url = FIREBASE_HOST + "status.json?auth=" + FIREBASE_AUTH;
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String payload = "{\"pintu\":" + String(status) + "}";
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http.begin(url);
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http.addHeader("Content-Type", "application/json");
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int code = http.PATCH(payload);
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Serial.println(code > 0 ? "Status pintu dikirim!" : "Gagal kirim status pintu");
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http.end();
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}
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}
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void bacaThresholdFirebase() {
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if (WiFi.status() == WL_CONNECTED) {
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HTTPClient http;
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String url = FIREBASE_HOST + "threshold.json?auth=" + FIREBASE_AUTH;
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http.begin(url);
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int res = http.GET();
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if (res == 200) {
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String response = http.getString();
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DynamicJsonDocument doc(256);
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deserializeJson(doc, response);
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threshold_ldr = doc["ldr"] | threshold_ldr;
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threshold_mq2 = doc["mq2"] | threshold_mq2;
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threshold_suhu = doc["suhu"] | threshold_suhu;
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}
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http.end();
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}
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}
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void kalibrasiMQ2() {
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long total = 0;
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const int sampleCount = 100;
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Serial.println("Kalibrasi MQ2 sedang dilakukan...");
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for (int i = 0; i < sampleCount; i++) {
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total += analogRead(MQ2_PIN);
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delay(50);
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}
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mq2Baseline = total / sampleCount;
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kalibrasiSelesai = true;
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Serial.print("Kalibrasi selesai. Nilai baseline MQ2: ");
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Serial.println(mq2Baseline);
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}
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void buzzerOnce() {
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digitalWrite(BUZZER_PIN, HIGH);
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delay(100);
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digitalWrite(BUZZER_PIN, LOW);
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}
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uint8_t getNextAvailableID() {
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for (uint8_t id = 1; id <= 127; id++) {
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if (finger.loadModel(id) != FINGERPRINT_OK) return id;
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}
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return 0;
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}
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uint8_t getFingerprintEnroll(uint8_t id) {
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int p = -1;
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Serial.println("Letakkan jari...");
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unsigned long timeoutStart = millis();
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while (p != FINGERPRINT_OK) {
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if (millis() - timeoutStart > 30000) {
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Serial.println("Timeout jari pertama.");
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return false;
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}
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p = finger.getImage();
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if (p == FINGERPRINT_NOFINGER) delay(100);
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}
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if (finger.image2Tz(1) != FINGERPRINT_OK) return false;
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Serial.println("Angkat jari...");
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delay(1000);
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while (finger.getImage() != FINGERPRINT_NOFINGER) delay(100);
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Serial.println("Letakkan lagi...");
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timeoutStart = millis();
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while (finger.getImage() != FINGERPRINT_OK) {
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if (millis() - timeoutStart > 30000) {
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Serial.println("Timeout jari kedua.");
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return false;
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}
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delay(100);
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}
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if (finger.image2Tz(2) != FINGERPRINT_OK) return false;
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if (finger.createModel() != FINGERPRINT_OK) return false;
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if (finger.storeModel(id) != FINGERPRINT_OK) return false;
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return true;
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}
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int bacaLDRRataRata(int jumlah) {
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long total = 0;
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for (int i = 0; i < jumlah; i++) {
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total += analogRead(LDR_PIN);
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delay(5);
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}
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return total / jumlah;
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}
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