/* Question 01
Write a program using ESP32 to toggle an LED to on / off connected 
to GPIO5 based on button press connected to GPIO4. 
Button Press should switch the LED ON, on release the LED should be 
switched off.
Also print the state of the button & LED on the serial monitor.
*/
// Define pin connections
const int buttonPin = 4;  // GPIO4 where the button is connected
const int ledPin = 5;     // GPIO5 where the LED is connected

// Variables to store the current state of the button and LED
int buttonState = 0;
int lastButtonState = 0;
bool ledState = false;

void setup() {
  // Initialize serial communication at 115200 baud
  Serial.begin(115200);

  // Set the button pin as input
  pinMode(buttonPin, INPUT);

  // Set the LED pin as output
  pinMode(ledPin, OUTPUT);

  // Initialize the LED to be off
  digitalWrite(ledPin, LOW);
}

void loop() {
  // Read the state of the button
  buttonState = digitalRead(buttonPin);

  // Check if the button is pressed
  if (buttonState == HIGH && lastButtonState == LOW) {
    // Button is pressed
    ledState = true;  // Turn on the LED
    Serial.println("Button pressed: LED ON");
  } else if (buttonState == LOW && lastButtonState == HIGH) {
    // Button is released
    ledState = false;  // Turn off the LED
    Serial.println("Button released: LED OFF");
  }

  // Update the lastButtonState
  lastButtonState = buttonState;

  // Set the LED state
  digitalWrite(ledPin, ledState ? HIGH : LOW);

  // Short delay to debounce the button press
  delay(50);
}