#define BLYNK_TEMPLATE_ID "TMPL3fF62WpXb"
#define BLYNK_TEMPLATE_NAME "Quickstart Template"

// Define the LED pin, button pin, and switch pin
#define LED_PIN 4
#define BUTTON_PIN 1
#define SWITCH_PIN 3

// Define the Blynk virtual pins for the button, switch, and uptime
#define BUTTON_VPIN V0;
#define SWITCH_VPIN V1;
#define UPTIME_VPIN V2;

// Create a Blynk object
Blynk blynk;

// Create a button widget and a switch widget
Button button(BUTTON_VPIN);
Switch switchWidget(SWITCH_VPIN);

// Setup the button widget and switch widget
void setup() {
  // Initialize Blynk
  blynk.begin("YOUR_AUTH_TOKEN", "YOUR_WIFI_SSID", "YOUR_WIFI_PASSWORD");

  // Set the LED pin to output mode
  pinMode(LED_PIN, OUTPUT);

  // Set the button pin to input mode
  pinMode(BUTTON_PIN, INPUT_PULLUP);

  // Set the switch pin to input mode
  pinMode(SWITCH_PIN, INPUT_PULLUP);

  // Attach the button widget to the button pin
  button.attach(buttonPressed);

  // Attach the switch widget to the switch pin
  switchWidget.attach(switchChanged);
}

// Loop function
void loop() {
  // Run Blynk
  blynk.run();

  // Check if the button is pressed
  if (digitalRead(BUTTON_PIN) == LOW) {
    // Toggle the LED state
    digitalWrite(LED_PIN, !digitalRead(LED_PIN));
  }

  // Check if the switch is on
  if (digitalRead(SWITCH_PIN) == LOW) {
    // Turn on the LED
    digitalWrite(LED_PIN, HIGH);
  } else {
    // Turn off the LED
    digitalWrite(LED_PIN, LOW);
  }

  // Send the uptime to Blynk
  blynk.virtualWrite(UPTIME_VPIN, millis() / 1000);
}

// Button pressed callback function
void buttonPressed() {
  // Toggle the LED state
  digitalWrite(LED_PIN, !digitalRead(LED_PIN));
}

// Switch changed callback function
void switchChanged() {
  // If the switch is on, turn on the LED. Otherwise, turn off the LED.
  digitalWrite(LED_PIN, digitalRead(SWITCH_PIN) == LOW);
}