/*
  MSJ Researchers World
  Date - 2nd DEC 2024
  Mentor - Mr. Siranjeevi M
  Contact - 7373771991
*/

#define LED_PIN 9 // RX Updating LED Signal

void setup() 
{
  // Initialize serial communication at 9600 baud rate
  Serial.begin(9600);

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

  Serial.println("Send data to the Arduino:");
  Serial.println("You can send an integer, float, string, or character.");
}

void loop() 
{
  // Check if data is available to read
  if (Serial.available() > 0) {
    // Turn on the LED when data is received
    digitalWrite(LED_PIN, HIGH);

    // Read the incoming data as a string
    String input = Serial.readStringUntil('\n'); // Read until newline character

    // Remove any extra whitespaces or newline characters
    input.trim();

    // Display the received data
    Serial.print("Received: ");
    Serial.println(input);

    // Determine and parse the input type
    if (input.length() == 1 && isAlpha(input[0])) {
      Serial.print("It's a character: ");
      Serial.println(input[0]);
    } else if (input.indexOf('.') != -1) { // Check if the input contains a decimal point
      Serial.print("It's a float: ");
      Serial.println(input.toFloat(), 4); // Display float with 4 decimal places
    } else if (input.toInt() != 0 || input == "0") {
      Serial.print("It's an integer: ");
      Serial.println(input.toInt());
    } else {
      Serial.println("It's a string.");
    }

    Serial.println();

    // Turn off the LED after a short delay
    delay(200); // LED stays on for 200 ms
    digitalWrite(LED_PIN, LOW);
  }
}