#define BLYNK_TEMPLATE_ID "TMPL3RgJ2-81j"
#define BLYNK_TEMPLATE_NAME "BLYNK"
#define BLYNK_AUTH_TOKEN "asNAK0lS_TO8-VNtl6OczdmItTI39p1m"
#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>
#include <Adafruit_SSD1306.h>
#include <Adafruit_GFX.h>
#include <NewPing.h>

char auth[] = "-asNAK0lS_TO8-VNtl6OczdmItTI39p1m";
char ssid[] = "Wokwi-GUEST";
char pass[] = "";

#define SCREEN_WIDTH 128
#define SCREEN_HEIGHT 64
#define OLED_RESET    -1
#define OLED_SDA_PIN 22
#define OLED_SCL_PIN 21
Adafruit_SSD1306 display(SCREEN_WIDTH,SCREEN_HEIGHT,OLED_SDA_PIN,OLED_SCL_PIN,OLED_RESET);

#define TRIGGER_PIN  17
#define ECHO_PIN     18
#define MAX_DISTANCE 400
NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE);

#define TEMP_PIN 34
const int Buzzer = 19;
float temperature = 0;
#define V_DISTANCE V1
#define V_TEMPERATURE V2

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

  if(!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) {
    Serial.println(F("SSD1306 allocation failed"));
    for(;;);
  }
  display.display();
  delay(2000);
  display.clearDisplay();

  pinMode(Buzzer, OUTPUT);
}

void loop() {
  Blynk.run();

  unsigned int distance = sonar.ping_cm();
  Blynk.virtualWrite(V_DISTANCE, distance);
  
  int sensorValue = analogRead(TEMP_PIN);
  float voltage = sensorValue * (3.3 / 4095.0);
  temperature = (voltage - 0.5) * 100; // Convert to Celsius
  Blynk.virtualWrite(V_TEMPERATURE, temperature);

  // Check for overcharge (example condition)
  if (temperature > 50) { 
    while(temperature>50)
    {// Example threshold
    digitalWrite(Buzzer, HIGH);
    delay(2000);
    digitalWrite(Buzzer, LOW);
    delay(1000);
  }
  } else {
    digitalWrite(Buzzer, LOW);
  }

  // Display data on OLED
  display.clearDisplay();
  display.setTextSize(2);
  display.setTextColor(SSD1306_WHITE);
  display.setCursor(0, 0);
  display.print("Distance: ");
  display.print(distance);
  display.println(" cm");
  display.print("Temp: ");
  display.print(temperature);
  display.println(" C");
  display.display();

  delay(1000);
}