147 lines
3.4 KiB
C++
147 lines
3.4 KiB
C++
#include <WiFiManager.h>
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#include <WiFi.h>
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#include <FirebaseESP32.h>
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#include <Wire.h>
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#include <LiquidCrystal_I2C.h>
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// Firebase config
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#define FIREBASE_HOST "https://tdsmeter-8042a-default-rtdb.firebaseio.com/"
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#define FIREBASE_AUTH "GnAvtjMBxgEqsEdPDiuCwBmo6dRxBKcr1JIEqEqz"
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// Pin
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#define TDS_PIN 34
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#define BUZZER_PIN 26
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// Ambang batas TDS (ppm)
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#define TDS_THRESHOLD 500
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// Kalibrasi TDS (atur berdasarkan hasil perbandingan)
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const float VREF = 3.3;
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const int ADC_RESOLUTION = 4095;
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float TDS_factor = 0.399; // Ganti sesuai kalibrasi
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// LCD I2C
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LiquidCrystal_I2C lcd(0x27, 16, 2);
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// Firebase
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FirebaseData firebaseData;
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FirebaseConfig firebaseConfig;
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FirebaseAuth firebaseAuth;
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// Variabel global
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float tdsValue = 0;
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float voltage = 0;
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String status = "";
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// Fungsi scroll teks LCD
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void scrollText(String text, int row, int delayTime) {
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int len = text.length();
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if (len <= 16) {
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lcd.setCursor(0, row);
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lcd.print(text);
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lcd.print(" ");
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delay(delayTime);
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return;
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}
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for (int i = 0; i <= len - 16; i++) {
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lcd.setCursor(0, row);
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lcd.print(text.substring(i, i + 16));
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delay(delayTime);
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}
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delay(500);
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}
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void setup() {
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Serial.begin(115200);
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// LCD setup
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lcd.init();
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lcd.backlight();
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lcd.setCursor(0, 0);
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lcd.print("TDS Monitor");
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delay(2000);
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lcd.clear();
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// Buzzer setup
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pinMode(BUZZER_PIN, OUTPUT);
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digitalWrite(BUZZER_PIN, HIGH); // Awalnya mati
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// WiFi Manager
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WiFiManager wm;
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if (!wm.autoConnect("ESP32_Config_AP")) {
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Serial.println("Gagal konek WiFi");
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delay(3000);
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ESP.restart();
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}
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Serial.println("WiFi Terhubung:");
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Serial.println(WiFi.localIP());
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// Firebase
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firebaseConfig.signer.tokens.legacy_token = FIREBASE_AUTH;
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firebaseConfig.database_url = FIREBASE_HOST;
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Firebase.begin(&firebaseConfig, &firebaseAuth);
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Firebase.reconnectWiFi(true);
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}
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void loop() {
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// Ambil 10 sampel ADC
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int total = 0;
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for (int i = 0; i < 10; i++) {
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total += analogRead(TDS_PIN);
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delay(10);
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}
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int analogValue = total / 10;
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// Konversi ke tegangan
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voltage = analogValue * (VREF / ADC_RESOLUTION);
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// Hitung TDS (pakai rumus polinomial + faktor kalibrasi)
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tdsValue = (133.42 * voltage * voltage * voltage - 255.86 * voltage * voltage + 857.39 * voltage) * TDS_factor;
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if (tdsValue < 0) tdsValue = 0;
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// Debug Serial
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Serial.print("ADC: ");
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Serial.print(analogValue);
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Serial.print(" | V: ");
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Serial.print(voltage, 4);
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Serial.print(" V | TDS: ");
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Serial.print(tdsValue, 2);
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Serial.println(" ppm");
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// LCD tampilan baris 1
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lcd.setCursor(0, 0);
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lcd.print("TDS: ");
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lcd.print(tdsValue, 1);
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lcd.print(" ppm ");
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// Penilaian status air
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if (tdsValue <= 50) {
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status = "Status: Sangat Baik";
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digitalWrite(BUZZER_PIN, HIGH); // Buzzer mati
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} else if (tdsValue <= 150) {
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status = "Status: Baik";
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digitalWrite(BUZZER_PIN, HIGH);
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} else if (tdsValue <= TDS_THRESHOLD) {
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status = "Status: Cukup Baik";
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digitalWrite(BUZZER_PIN, HIGH);
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} else {
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status = "Status: Buruk";
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digitalWrite(BUZZER_PIN, LOW); // Buzzer menyala
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}
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// Scroll teks status di baris 2
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scrollText(status, 1, 250);
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// Kirim data ke Firebase
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if (Firebase.setFloat(firebaseData, "/TDS/value", tdsValue) &&
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Firebase.setString(firebaseData, "/TDS/status", status)) {
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Serial.println("Data terkirim ke Firebase");
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} else {
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Serial.print("Gagal kirim: ");
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Serial.println(firebaseData.errorReason());
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}
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delay(1000);
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}
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