#define BLYNK_TEMPLATE_ID "TMPL68o6-3Hna"
#define BLYNK_TEMPLATE_NAME "Water Quality Monitoring"
#define BLYNK_AUTH_TOKEN "xaRRwZQs0V0-Q8iktfDysk28OrFUFRqY"

#define BLYNK_PRINT Serial


#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <WiFi.h>
#include <BlynkSimpleEsp32.h>
#include <OneWire.h> // For DS18B20
#include <DallasTemperature.h> // For DS18B20


// Blynk credentials
char auth[] = BLYNK_AUTH_TOKEN;
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

// Pin definitions
#define TDS_PIN 34
#define TURBIDITY_PIN 35
#define PH_PIN 32
#define TEMP_PIN 23 // For DS18B20

// LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2); // Change address and size if necessary

// Temperature Sensor setup
OneWire oneWire(TEMP_PIN);
DallasTemperature sensors(&oneWire);

void setup() {
  Serial.begin(115200);
  Blynk.begin(auth, ssid, pass);
  sensors.begin();

  // Initialize LCD with columns and rows
  lcd.begin(16, 2); // 16 columns and 2 rows
  lcd.backlight(); // Turn on the backlight
}

void loop() {
  Blynk.run();

  // Simulate sensor readings
  int tdsValue = analogRead(TDS_PIN);
  int turbidityValue = analogRead(TURBIDITY_PIN);
  int phValue = analogRead(PH_PIN);

  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);

  // Display data on LCD
  lcd.setCursor(0, 0);
  lcd.print("TDS: ");
  lcd.print(tdsValue);
  lcd.print("   ");

  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print("C");

  // Send data to Blynk
  Blynk.virtualWrite(V1, tdsValue); // Simulated TDS Sensor
  Blynk.virtualWrite(V2, turbidityValue); // Simulated Turbidity Sensor
  Blynk.virtualWrite(V3, phValue); // Simulated pH Sensor
  Blynk.virtualWrite(V4, temperature); // Temperature Sensor

  delay(1000); // Update every second
}