#define BLYNK_TEMPLATE_ID "TMPL6paS1z_J3"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"

#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <OneWire.h>
#include <DallasTemperature.h>
#include <BlynkSimpleEsp32.h>

// Blynk credentials
#define BLYNK_TEMPLATE_ID "TMPL6paS1z_J3"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"

// LCD setup
LiquidCrystal_I2C lcd(0x27, 16, 2);

// DS18B20 setup
#define ONE_WIRE_BUS 4
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature sensors(&oneWire);

// Ultrasonic sensor pins
#define TRIG_PIN 5
#define ECHO_PIN 18

void setup() {
  Serial.begin(115200);
  Blynk.begin();

  // LCD initialization
  lcd.init();
  lcd.backlight();
  lcd.setCursor(0, 0);
  lcd.print("Initializing...");

  // DS18B20 initialization
  sensors.begin();
  
  // Ultrasonic sensor initialization
  pinMode(TRIG_PIN, OUTPUT);
  pinMode(ECHO_PIN, INPUT);
}

void loop() {
  Blynk.run();
  sensors.requestTemperatures();
  float temperature = sensors.getTempCByIndex(0);
  
  // Ultrasonic sensor measurement
  digitalWrite(TRIG_PIN, LOW);
  delayMicroseconds(2);
  digitalWrite(TRIG_PIN, HIGH);
  delayMicroseconds(10);
  digitalWrite(TRIG_PIN, LOW);
  long duration = pulseIn(ECHO_PIN, HIGH);
  float distance = duration * 0.034 / 2;

  // Display values on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  lcd.setCursor(0, 1);
  lcd.print("Dist: ");
  lcd.print(distance);
  lcd.print(" cm");

  // Send values to Blynk
  Blynk.virtualWrite(V1, temperature);
  Blynk.virtualWrite(V2, distance);

  delay(1000);
}