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#include <LiquidCrystal_I2C.h>
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#include <ESP32_Servo.h>
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#include <Wire.h>
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#include <EEPROM.h>
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#include "Arduino.h"
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#include <WiFi.h>
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#include "ESP32MQTTClient.h"
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const char *ssid = "rasi";
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const char *pass = "12345678";
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char *server = "mqtt://broker.emqx.io:1883";
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#define TCAADDR 0x70 // Alamat multiplexer TCA9548A
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#define LCD1_ADDR 0x27 // Alamat LCD pertama
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#define LCD2_ADDR 0x26 // Alamat LCD kedua
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LiquidCrystal_I2C lcd1(LCD1_ADDR, 16, 2);
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LiquidCrystal_I2C lcd2(LCD2_ADDR, 16, 2);
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const int col = 16;
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const int row = 2;
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ESP32MQTTClient mqttClient; // all params are set later
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Servo myservo; // Create a servo object to control a servo
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int servoPin = 26;
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float temperature = 25, tdsValue = 0;
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const int sensorPh1 = 34; // Pin analog untuk membaca tegangan dari sensor pH 1
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const int sensorPh2 = 35; // Pin analog untuk membaca tegangan dari sensor pH 2
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float voltage1;
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float pH1;
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float voltage2;
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float pH2;
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// Nilai-nilai kalibrasi untuk sensor pH 1
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float pH11 = 6.86;
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float voltage11 = 3.06;
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float pH21 = 9.18;
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float voltage21 = 2.53;
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// Nilai-nilai kalibrasi untuk sensor pH 2
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float pH12 = 6.86;
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float voltage12 = 2.53;
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float pH22 = 9.18;
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float voltage22 = 2.06;
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const int TdsSensorPin1 = 33;
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const int TdsSensorPin2 = 32;
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float tdsValue1 = 0;
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float tdsValue2 = 0;
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float analogToVolt(float adc) {
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float voltase = 3.3;
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float hasil = (adc * voltase) / 4095.0;
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return hasil;
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}
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float getPersentaseAdc(int pin) {
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int jumlah = 100;
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float nilai = 0;
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for (int i = 0; i < jumlah; i++) {
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nilai += analogRead(pin);
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}
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nilai = nilai / jumlah;
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return nilai;
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}
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float nilaiTds1(float volt) {
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if (volt > 0) {
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float y = 68.902 * exp(1.1071 * volt);
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return y;
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}
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return 0;
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}
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float nilaiTds2(float volt) {
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if (volt > 0) {
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float y = 71.413 * exp(1.3268 * volt);
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return y;
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}
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return 0;
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}
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void setup() {
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Serial.begin(115200);
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Wire.begin();
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myservo.attach(servoPin);
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lcd1.init();
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lcd1.backlight();
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lcd1.clear();
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lcd2.init();
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lcd2.backlight();
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lcd2.clear();
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mqttClient.enableDebuggingMessages();
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mqttClient.setURI(server);
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mqttClient.enableLastWillMessage("lwt", "I am going offline");
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mqttClient.setKeepAlive(30);
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WiFi.begin(ssid, pass);
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mqttClient.loopStart();
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pinMode(TdsSensorPin1, INPUT);
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pinMode(TdsSensorPin2, INPUT);
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}
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void loop() {
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// Membaca tegangan dari sensor pH
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int jumlahData = 100;
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int total1 = 0;
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int total2 = 0;
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for (int i = 0; i < jumlahData; i++) {
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int nilai1 = analogRead(sensorPh1); // Membaca nilai analog dari sensor pH 1
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total1 += nilai1; // Menambahkan nilai ke total sensor pH 1
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int nilai2 = analogRead(sensorPh2); // Membaca nilai analog dari sensor pH 2
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total2 += nilai2; // Menambahkan nilai ke total sensor pH 2
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}
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float rataRata1 = (float)total1 / jumlahData;
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float rataRata2 = (float)total2 / jumlahData;
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// Mengonversi nilai bacaan analog menjadi tegangan (dalam volt)
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voltage1 = rataRata1 * (3.3 / 4095.0); // 3.3 adalah tegangan referensi pada ESP32
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voltage2 = rataRata2 * (3.3 / 4095.0); // 3.3 adalah tegangan referensi pada ESP32
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Serial.println("Voltage pH 1: " + String(voltage1));
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Serial.println("Voltage pH 2: " + String(voltage2));
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// Menggunakan persamaan linier untuk mengonversi tegangan menjadi pH untuk sensor pH 1
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float m1 = (pH21 - pH11) / (voltage21 - voltage11); // Mencari kemiringan (slope) m untuk sensor pH 1
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float c1 = pH11 - m1 * voltage11; // Mencari perpotongan dengan sumbu y (intercept) c untuk sensor pH 1
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pH1 = (voltage1 < 0.01) ? 0 : m1 * voltage1 + c1; // Menggunakan persamaan garis untuk menghitung nilai pH dari voltage1
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// Menggunakan persamaan linier untuk mengonversi tegangan menjadi pH untuk sensor pH 2
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float m2 = (pH22 - pH12) / (voltage22 - voltage12); // Mencari kemiringan (slope) m untuk sensor pH 2
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float c2 = pH12 - m2 * voltage12; // Mencari perpotongan dengan sumbu y (intercept) c untuk sensor pH 2
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pH2 = (voltage2 < 0.01) ? 0 : m2 * voltage2 + c2; // Menggunakan persamaan garis untuk menghitung nilai pH dari voltage2
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float voltTds1 = analogToVolt(getPersentaseAdc(TdsSensorPin1));
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float voltTds2 = analogToVolt(getPersentaseAdc(TdsSensorPin2));
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tdsValue1 = nilaiTds1(voltTds1);
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tdsValue2 = nilaiTds2(voltTds2);
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// Check TDS levels
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if (tdsValue1 > 900) {
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// Rotate servo (example rotation, adjust as per your servo specifications)
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mqttClient.publish("servo", "1", 0, false);
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myservo.write(0); // Rotate servo to 90 degrees position
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delay(1000); // Wait for the servo to reach the position
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} else {
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// Servo back to initial position or stop rotation
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myservo.write(360); // Rotate servo to 0 degrees position
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delay(1000); // Wait for the servo to reach the position
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}
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// Menampilkan nilai pH dan TDS ke Serial Monitor
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Serial.println("pH 1: " + String(pH1));
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Serial.println("pH 2: " + String(pH2));
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Serial.println("TDS 1: " + String(tdsValue1) + " ppm");
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Serial.println("TDS 2: " + String(tdsValue2) + " ppm");
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// Menampilkan nilai pH dan TDS ke LCD
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lcd1.clear();
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lcd2.clear();
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lcd1.setCursor(0, 1);
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lcd1.print("pH 1: ");
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lcd1.print(pH1);
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lcd2.setCursor(0, 1);
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lcd2.print("pH 2: ");
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lcd2.print(pH2);
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// Delay 1 detik sebelum membaca kembali
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lcd1.setCursor(0, 0);
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lcd1.print("TDS 1: ");
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lcd1.print(tdsValue1, 0);
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lcd1.print(" ppm");
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lcd2.setCursor(0, 0);
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lcd2.print("TDS 2: ");
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lcd2.print(tdsValue2, 0);
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lcd2.print(" ppm");
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delay(1000); // Delay 1 detik sebelum membaca kembali
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String msg1 = "{\"ph\":\"" + String(pH1) + "\",\"tds\":\"" + String(tdsValue1) + "\"}";
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mqttClient.publish("airlaut", msg1, 0, false);
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String msg2 = "{\"ph\":\"" + String(pH2) + "\",\"tds\":\"" + String(tdsValue2) + "\"}";
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mqttClient.publish("airbersih", msg2, 0, false);
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}
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void onConnectionEstablishedCallback(esp_mqtt_client_handle_t client)
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{
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if (mqttClient.isMyTurn(client)) // can be omitted if only one client
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{
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mqttClient.subscribe("servo", [](const String &topic, const String &payload)
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{
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myservo.write(0); // Rotate servo to 90 degrees position
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delay(1000);
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myservo.write(360);
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delay(1000); });
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}
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mqttClient.subscribe("servo", [](const String &topic, const String &payload)
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{
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myservo.write(360); // Rotate servo to 90 degrees position
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delay(1000);
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myservo.write(0);
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delay(1000); });
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}
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esp_err_t handleMQTT(esp_mqtt_event_handle_t event)
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{
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mqttClient.onEventCallback(event);
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return ESP_OK;
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}
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