#define BLYNK_TEMPLATE_ID "TMPL3x9H7-Sit"
#define BLYNK_TEMPLATE_NAME "PROJECT"
#define BLYNK_AUTH_TOKEN "3nS7CxKkAiAkUSbnozj19mlehFfel2wI"

#include <WiFi.h>
#include <WiFiClient.h>
#include <Wire.h>
#include <BlynkSimpleEsp32.h>
#include <LiquidCrystal_I2C.h>
#include <NewPing.h>


// Blynk credentials
char auth[] = "3nS7CxKkAiAkUSbnozj19mlehFfel2wI";  // Replace with your Blynk auth token
char ssid[] = "Wokwi-GUEST";         // Replace with your WiFi SSID
char pass[] = "";     // Replace with your WiFi password

// LCD configuration
LiquidCrystal_I2C lcd(0x27, 16, 2); // Adjust address if needed

// Ultrasonic sensor configuration
#define TRIGGER_PIN  17
#define ECHO_PIN     18
#define MAX_DISTANCE 400
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

// Temperature sensor and voltage divider configuration
#define TEMP_PIN 34
#define VOLTAGE_PIN 32
const int Buzzer = 19;
float temperature = 0;
float batteryVoltage = 0;

// Virtual pins for Blynk
#define V_DISTANCE V1
#define V_TEMPERATURE V2
#define V_VOLTAGE V3

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

  // Initialize the LCD
  lcd.begin(16, 2);
  lcd.init();
  lcd.backlight();
  lcd.clear();

  pinMode(Buzzer, OUTPUT);
}

void loop() {
  Blynk.run();  // Run Blynk

  // Get distance from the ultrasonic sensor
  unsigned int distance = sonar.ping_cm();
  Blynk.virtualWrite(V1, distance);

  // Get temperature from the analog sensor
  int tempSensorValue = analogRead(TEMP_PIN);
  float tempVoltage = tempSensorValue * (3.3 / 4095.0);
  temperature = (tempVoltage - 0.5) * 100;  // Convert to Celsius
  Blynk.virtualWrite(V2, temperature);

  // Get battery voltage from the voltage divider
  int voltageSensorValue = analogRead(VOLTAGE_PIN);
  batteryVoltage = voltageSensorValue * (3.3 / 4095.0) * 2;  // Adjust the factor according to the voltage divider
  Blynk.virtualWrite(V3, batteryVoltage);

  // Check for overcharge condition
  if (temperature > 50) {
    while(temperature>50){
    digitalWrite(Buzzer, HIGH);
    delay(2000);}
    digitalWrite(Buzzer,LOW);
    delay(200);
  } else {
    digitalWrite(Buzzer, LOW);
  }

  // Display data on LCD
  lcd.clear();
  lcd.setCursor(0, 0);
  lcd.print("Dist: ");
  lcd.print(distance);
  lcd.print(" cm");
  lcd.setCursor(0, 1);
  lcd.print("Temp: ");
  lcd.print(temperature);
  lcd.print(" C");
  lcd.setCursor(8, 1);
  lcd.print("Volt: ");
  lcd.print(batteryVoltage);
  lcd.print(" V");

  delay(1000);
}