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#include <WiFi.h>
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#include <HTTPClient.h>
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#include <FirebaseESP32.h>
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#include <WiFiManager.h>
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#include <time.h>
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#define API_KEY "AIzaSyDCtvZMg-Ma0BCjG3eEpEEgs19EJVBTx90"
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#define DATABASE_URL "https://floodwatch-cabc5-default-rtdb.asia-southeast1.firebasedatabase.app/"
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String namaSungai = "sungai_bedadung";
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FirebaseData fbdo;
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FirebaseAuth auth;
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FirebaseConfig config;
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const char* backendHistoriURL = "https://services-flood.vercel.app/api/histori";
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const char* backendNotifikasiURL = "https://services-flood.vercel.app/api/notifikasi";
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#define LORA_TX 17
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#define LORA_RX 16
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#define M0 25
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#define M1 26
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#define LED_PIN 15
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#define BUTTON_PIN 4
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unsigned long lastDataTime = 0;
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unsigned long lastBackendTime = 0;
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unsigned long lastThresholdCheck = 0;
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unsigned long lastDaruratCheck = 0;
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const unsigned long dataInterval = 5000;
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const unsigned long backendInterval = 60000;
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const unsigned long thresholdInterval = 10000;
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const unsigned long daruratInterval = 5000;
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float lastKetinggian = 0;
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float lastKetinggianDarurat = 0;
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float nilaiAmbangBatas = 150.0;
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float tinggiSensorDariDasar = 200.0;
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const float ambangKenaikanDarurat = 30.0; // Lonjakan ketinggian cepat dalam 5 detik
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void setup() {
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Serial.begin(115200);
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pinMode(M0, OUTPUT);
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pinMode(M1, OUTPUT);
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digitalWrite(M0, LOW);
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digitalWrite(M1, LOW);
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Serial2.begin(9600, SERIAL_8N1, LORA_RX, LORA_TX);
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delay(500);
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pinMode(LED_PIN, OUTPUT);
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pinMode(BUTTON_PIN, INPUT_PULLUP);
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digitalWrite(LED_PIN, LOW);
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if (digitalRead(BUTTON_PIN) == LOW) {
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WiFiManager wm;
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wm.resetSettings();
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delay(1000);
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ESP.restart();
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}
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WiFi.mode(WIFI_STA);
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WiFiManager wm;
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wm.setTimeout(180);
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if (!wm.autoConnect("FloodWatch-Receiver")) {
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Serial.println("Failed to connect and hit timeout");
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delay(3000);
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ESP.restart();
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}
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Serial.println("Connected to WiFi: " + WiFi.SSID());
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digitalWrite(LED_PIN, HIGH);
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configTime(0, 0, "pool.ntp.org", "time.nist.gov");
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config.api_key = API_KEY;
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config.database_url = DATABASE_URL;
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auth.user.email = "sungaibedadung@gmail.com";
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auth.user.password = "123456";
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Firebase.begin(&config, &auth);
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Firebase.reconnectWiFi(true);
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Serial.println("📡 Receiver LoRa Flood Detection Ready");
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}
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void loop() {
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unsigned long currentMillis = millis();
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if (Serial2.available()) {
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String incoming = Serial2.readStringUntil('\n');
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incoming.trim();
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Serial.print("📩 Pesan masuk: ");
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Serial.println(incoming);
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if (incoming.startsWith("DATA:")) {
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processSensorData(incoming);
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lastDataTime = currentMillis;
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} else if (incoming.startsWith("ACK:")) {
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Serial.println("✅ Sender menerima update kalibrasi");
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}
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}
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if (currentMillis - lastThresholdCheck >= thresholdInterval) {
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lastThresholdCheck = currentMillis;
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checkFirebaseThreshold();
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}
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if (currentMillis - lastBackendTime >= backendInterval) {
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lastBackendTime = currentMillis;
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sendToBackend(lastKetinggian);
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}
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checkKenaikanDarurat(); // 🔥 Tambahan untuk deteksi mendadak
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updateLEDStatus();
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checkResetButton();
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}
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void processSensorData(String data) {
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int kStart = data.indexOf("KETINGGIAN=");
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int hStart = data.indexOf("HUJAN=");
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int endData = data.indexOf(';', hStart);
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if (kStart != -1 && hStart != -1 && endData != -1) {
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float ketinggian = data.substring(kStart + 11, hStart - 1).toFloat();
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int hujan = data.substring(hStart + 6, endData).toInt();
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lastKetinggian = ketinggian;
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Serial.println("📊 Data Sensor:");
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Serial.println(" Ketinggian: " + String(ketinggian) + " cm");
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Serial.println(" Hujan: " + String(hujan) + "%");
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updateFirebaseData(ketinggian, hujan);
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}
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}
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void checkFirebaseThreshold() {
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String pathTinggi = "/" + namaSungai + "/kalibrasi/tinggiSensor";
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String pathAmbang = "/" + namaSungai + "/threshold/nilai";
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bool needUpdate = false;
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if (Firebase.getFloat(fbdo, pathTinggi) && fbdo.httpCode() == 200) {
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float newTinggi = fbdo.floatData();
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if (newTinggi != tinggiSensorDariDasar) {
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tinggiSensorDariDasar = newTinggi;
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Serial.println("🔄 Tinggi sensor diperbarui: " + String(newTinggi));
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needUpdate = true;
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}
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}
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if (Firebase.getFloat(fbdo, pathAmbang) && fbdo.httpCode() == 200) {
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float newAmbang = fbdo.floatData();
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if (newAmbang != nilaiAmbangBatas) {
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nilaiAmbangBatas = newAmbang;
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Serial.println("🔄 Ambang batas diperbarui: " + String(newAmbang));
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needUpdate = true;
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}
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}
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if (needUpdate) {
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String cmd = "SETTING:TINGGI=" + String(tinggiSensorDariDasar, 1) +
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",BATAS=" + String(nilaiAmbangBatas, 1) + ";";
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Serial2.println(cmd);
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Serial.println("📤 Mengirim kalibrasi: " + cmd);
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}
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}
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void updateFirebaseData(float ketinggian, int hujan) {
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String path = "/" + namaSungai;
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Firebase.setFloat(fbdo, path + "/ketinggian", ketinggian);
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Firebase.setInt(fbdo, path + "/hujan", hujan);
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}
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void sendToBackend(float ketinggian) {
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if (WiFi.status() != WL_CONNECTED) {
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Serial.println("⚠ WiFi tidak terhubung");
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return;
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}
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String level = "AMAN";
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if (ketinggian >= nilaiAmbangBatas) {
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level = "BAHAYA";
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} else if (ketinggian >= nilaiAmbangBatas * 0.7) {
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level = "WASPADA";
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}
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time_t now;
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time(&now);
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HTTPClient http;
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http.begin(backendHistoriURL);
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http.addHeader("Content-Type", "application/json");
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String jsonHistori = "{\"sungai\":\"" + namaSungai +
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"\",\"ketinggian\":" + String(ketinggian, 1) +
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",\"timestamp\":" + String(now) +
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",\"level\":\"" + level + "\"}";
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int httpCode = http.POST(jsonHistori);
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Serial.printf(httpCode > 0 ? "✅ Histori terkirim (HTTP %d)\n" : "❌ Gagal kirim histori (HTTP %d)\n", httpCode);
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http.end();
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if (level == "WASPADA" || level == "BAHAYA") {
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http.begin(backendNotifikasiURL);
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http.addHeader("Content-Type", "application/json");
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String jsonNotif = "{\"sungai\":\"" + namaSungai +
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"\",\"ketinggian\":" + String(ketinggian, 1) +
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",\"timestamp\":" + String(now) +
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",\"level\":\"" + level + "\"}";
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int notifCode = http.POST(jsonNotif);
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Serial.printf(notifCode > 0 ? "📣 Notifikasi terkirim (HTTP %d)\n" : "⚠ Gagal kirim notifikasi (HTTP %d)\n", notifCode);
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http.end();
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}
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}
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// 🔥 Deteksi Kenaikan Cepat Air
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void checkKenaikanDarurat() {
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unsigned long now = millis();
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if (now - lastDaruratCheck >= daruratInterval) {
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float delta = lastKetinggian - lastKetinggianDarurat;
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if (delta >= ambangKenaikanDarurat && lastKetinggian >= nilaiAmbangBatas * 0.7) {
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Serial.println("🚨 Deteksi banjir mendadak! Naik cepat.");
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kirimNotifikasiDarurat();
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}
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lastKetinggianDarurat = lastKetinggian;
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lastDaruratCheck = now;
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}
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}
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// 🔔 Kirim Notifikasi Darurat Langsung
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void kirimNotifikasiDarurat() {
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if (WiFi.status() != WL_CONNECTED) return;
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time_t now;
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time(&now);
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HTTPClient http;
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http.begin(backendNotifikasiURL);
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http.addHeader("Content-Type", "application/json");
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String jsonNotif = "{\"sungai\":\"" + namaSungai +
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"\",\"ketinggian\":" + String(lastKetinggian, 1) +
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",\"timestamp\":" + String(now) +
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",\"level\":\"DARURAT\"}";
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int code = http.POST(jsonNotif);
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Serial.printf(code > 0 ? "🚨 Notif DARURAT dikirim (HTTP %d)\n" : "❌ Gagal kirim notif darurat (HTTP %d)\n", code);
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http.end();
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}
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void updateLEDStatus() {
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static unsigned long lastBlink = 0;
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static bool ledState = false;
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if (WiFi.status() == WL_CONNECTED) {
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digitalWrite(LED_PIN, HIGH);
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} else {
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unsigned long now = millis();
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if (now - lastBlink >= 500) {
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lastBlink = now;
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ledState = !ledState;
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digitalWrite(LED_PIN, ledState);
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}
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}
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}
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void checkResetButton() {
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static unsigned long lastPress = 0;
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if (digitalRead(BUTTON_PIN) == LOW && millis() - lastPress > 200) {
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lastPress = millis();
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Serial.println("🔄 Tombol reset WiFi ditekan");
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digitalWrite(LED_PIN, LOW);
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WiFiManager wm;
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wm.resetSettings();
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delay(1000);
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ESP.restart();
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}
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}
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#include <HardwareSerial.h>
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// -------------------- Pin Konfigurasi --------------------
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#define LORA_TX 17
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#define LORA_RX 16
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#define M0 25
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#define M1 26
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#define TRIG_PIN 5
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#define ECHO_PIN 18
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#define RAIN_SENSOR_PIN 34
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#define BUZZER_PIN 27
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// -------------------- Variabel Sensor --------------------
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float ketinggianAir;
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int rainPercent;
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// -------------------- Kalibrasi --------------------
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float tinggiSensorDariDasar = 200.0;
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float batasAmanKetinggian = 150.0;
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// -------------------- Timing & Filter --------------------
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unsigned long lastSendTime = 0;
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const unsigned long sendInterval = 2000;
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#define FILTER_SAMPLES 5
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float distanceSamples[FILTER_SAMPLES];
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int currentSample = 0;
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// -------------------- Buzzer --------------------
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unsigned long lastBuzzerTime = 0;
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const unsigned long buzzerInterval = 200;
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bool buzzerState = false;
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void setup() {
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Serial.begin(115200);
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pinMode(M0, OUTPUT);
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pinMode(M1, OUTPUT);
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digitalWrite(M0, LOW);
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digitalWrite(M1, LOW);
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Serial2.begin(9600, SERIAL_8N1, LORA_RX, LORA_TX);
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delay(500);
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Serial.println("🚀 Sender LoRa Flood Detection Ready");
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pinMode(TRIG_PIN, OUTPUT);
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pinMode(ECHO_PIN, INPUT);
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pinMode(RAIN_SENSOR_PIN, INPUT);
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pinMode(BUZZER_PIN, OUTPUT);
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digitalWrite(BUZZER_PIN, LOW);
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for (int i = 0; i < FILTER_SAMPLES; i++) {
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distanceSamples[i] = tinggiSensorDariDasar;
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}
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}
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void loop() {
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unsigned long currentMillis = millis();
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processIncomingMessages();
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float distance = readUltrasonic();
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ketinggianAir = tinggiSensorDariDasar - distance;
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ketinggianAir = constrain(ketinggianAir, 0, tinggiSensorDariDasar);
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rainPercent = readRainSensor();,
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controlBuzzer(currentMillis);
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if (currentMillis - lastSendTime >= sendInterval) {
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lastSendTime = currentMillis;
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sendSensorData();
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}
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delay(50);
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}
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void processIncomingMessages() {
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if (Serial2.available()) {
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String incoming = Serial2.readStringUntil('\n');
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incoming.trim();
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Serial.print("📩 Pesan masuk: ");
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Serial.println(incoming);
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if (incoming.startsWith("SETTING:")) {
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int tStart = incoming.indexOf("TINGGI=");
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int bStart = incoming.indexOf("BATAS=");
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int endCmd = incoming.indexOf(';');
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if (tStart != -1 && bStart != -1 && endCmd != -1) {
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float newTinggi = incoming.substring(tStart + 7, bStart - 1).toFloat();
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float newBatas = incoming.substring(bStart + 6, endCmd).toFloat();
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if (newTinggi > 0 && newBatas > 0) {
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tinggiSensorDariDasar = newTinggi;
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batasAmanKetinggian = newBatas;
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Serial.println("🔧 Kalibrasi diperbarui:");
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Serial.println(" Tinggi Sensor: " + String(tinggiSensorDariDasar) + " cm");
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Serial.println(" Batas Aman: " + String(batasAmanKetinggian) + " cm");
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Serial2.println("ACK:SETTING_OK;");
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}
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}
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}
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}
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}
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float readUltrasonic() {
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digitalWrite(TRIG_PIN, LOW);
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delayMicroseconds(2);
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digitalWrite(TRIG_PIN, HIGH);
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delayMicroseconds(10);
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digitalWrite(TRIG_PIN, LOW);
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long duration = pulseIn(ECHO_PIN, HIGH, 30000);
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if (duration == 0) {
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Serial.println("⚠ Error: Sensor ultrasonik tidak merespon");
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return tinggiSensorDariDasar;
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}
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float distance = duration * 0.034 / 2;
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distanceSamples[currentSample] = distance;
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currentSample = (currentSample + 1) % FILTER_SAMPLES;
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float avgDistance = 0;
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for (int i = 0; i < FILTER_SAMPLES; i++) {
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avgDistance += distanceSamples[i];
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}
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return avgDistance / FILTER_SAMPLES;
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}
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int readRainSensor() {
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int rawValue = analogRead(RAIN_SENSOR_PIN);
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int percent = map(rawValue, 4095, 0, 0, 100);
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return constrain(percent, 0, 100);
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}
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void controlBuzzer(unsigned long currentTime) {
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if (ketinggianAir >= batasAmanKetinggian) {
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if (currentTime - lastBuzzerTime >= buzzerInterval) {
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lastBuzzerTime = currentTime;
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buzzerState = !buzzerState;
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digitalWrite(BUZZER_PIN, buzzerState ? HIGH : LOW);
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}
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} else {
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digitalWrite(BUZZER_PIN, LOW);
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buzzerState = false;
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}
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}
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void sendSensorData() {
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String dataStr = "DATA:KETINGGIAN=" + String(ketinggianAir, 1) +
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",HUJAN=" + String(rainPercent) + ";";
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Serial2.println(dataStr);
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Serial.println("📤 Mengirim data: " + dataStr);
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}
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