#define BLYNK_TEMPLATE_ID "TMPL6j1Nbht2P"
#define BLYNK_TEMPLATE_NAME "OnOff Led"
#define BLYNK_AUTH_TOKEN "KG78xQVv2iFT6ORZTyOud3WNy8bsdDub"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

char auth[] = BLYNK_AUTH_TOKEN;

char ssid[] = "Wokwi-GUEST";
char pass[] = "";


BlynkTimer timer;


#define ledPin  13  
#define buttonPin  2 

#define button2_vpin  V2  

BLYNK_CONNECTED() {
  Serial.println("Connected to Blynk server.");
  Blynk.syncVirtual(button2_vpin); 
}


bool ledState = false;         
bool lastButtonState = HIGH;    
bool currentButtonState = HIGH; 


BLYNK_WRITE(button2_vpin) {
  ledState = param.asInt(); 
  digitalWrite(ledPin, ledState ? HIGH : LOW);  
  Serial.print("LED State Updated from Blynk: ");
  Serial.println(ledState ? "ON" : "OFF");
}


void btn() {

  currentButtonState = digitalRead(buttonPin);
  if (currentButtonState == LOW && lastButtonState == HIGH) {
    ledState = !ledState;  
    digitalWrite(ledPin, ledState ? HIGH : LOW);  
    Serial.print("LED State Changed by Physical Button to: ");
    Serial.println(ledState ? "ON" : "OFF");

    Blynk.virtualWrite(button2_vpin, ledState);
  }

  lastButtonState = currentButtonState;
}

void checkConnection() {
  if (!Blynk.connected()) {
    Serial.println("Reconnecting to Blynk...");
    Blynk.disconnect();
    Blynk.connect();
  }
}

void setup() {

  Serial.begin(9600); 
  delay(1000); 
  Serial.println("Starting ESP32 Blynk connection...");

  pinMode(ledPin, OUTPUT);            
  pinMode(buttonPin, INPUT_PULLUP);  

  digitalWrite(ledPin, ledState ? HIGH : LOW);
  Serial.println("Pin modes set. Attempting to connect to WiFi and Blynk...");

  Blynk.begin(auth, ssid, pass);

  timer.setInterval(10000L, checkConnection);
}

void loop() {
  Blynk.run(); 
  timer.run();  
  btn();       
}