Morse_code.ino

#include <ctype.h>

// Define variables for the maximum length of the input string
const int maxStringLen = 100;
char stringToMorseCode[maxStringLen + 1]; // +1 for null terminator

// Create variables to define the output pins and LDR pins
int ledRed = 12;        // Red LED connected to pin 12
int ledBlue = 6;        // Blue LED connected to pin 6
int ldrPin1 = A0;       // LDR 1 connected to analog pin A0
int ldrPin2 = A1;       // LDR 2 connected to analog pin A1

// Define threshold values for each LED color
int redThreshold = 500;   // Adjust as needed
int blueThreshold = 300;  // Adjust as needed

// Define Morse code timing parameters
int dotLen = 100;       // length of the morse code 'dot'
int dashLen = dotLen * 3;  // length of the morse code 'dash'
int elemPause = dotLen;   // length of the pause between elements of a character
int Spaces = dotLen * 3;  // length of the spaces between characters

// Function to read LDR and determine dot or dash based on intensity
char ReadLDR(int pin) {
  int intensity = analogRead(pin);
  if (intensity < 400) { // You may need to adjust this threshold
    return '.'; // Dot
  } else {
    return '-'; // Dash
  }
}

// the setup routine runs once when you press reset:
void setup() {
  // initialize the digital pins as outputs for LED lights
  pinMode(ledRed, OUTPUT);
  pinMode(ledBlue, OUTPUT);

  // initialize serial communication at 9600 bits per second
  Serial.begin(9600);

  // Prompt the user to enter the string to convert to Morse Code
  Serial.println("Enter the string to convert to Morse Code:");
}

// Create a loop of the letters/words you want to output in morse code (defined in string at top of code)
void loop() {
  // Read the input string from the Serial Monitor
  if (Serial.available() > 0) {
    // Read the input string until newline character is received
    String inputString = Serial.readStringUntil('\n');
    // Convert the String to a char array
    inputString.toCharArray(stringToMorseCode, maxStringLen);
    
    // Loop through the string and get each character one at a time until the end is reached
    for (int i = 0; i < strlen(stringToMorseCode); i++) {
      // Get the character in the current position
      char tmpChar = stringToMorseCode[i];
      // Set the case to lower case
      tmpChar = toLowerCase(tmpChar);
      // Call the subroutine to get the Morse code equivalent for this character
      GetChar(tmpChar);
      // Read the LDR intensity values
      char redLDR = ReadLDR(ldrPin1);
      char blueLDR = ReadLDR(ldrPin2);
      // Determine LED status based on LDR intensity
      bool redLedStatus = redLDR == '-';
      bool blueLedStatus = blueLDR == '-';
      // Output character and LED status to serial monitor
      Serial.print("Character: ");
      Serial.print(tmpChar);
      Serial.print(" | Red LED Status: ");
      Serial.print(redLedStatus ? "ON" : "OFF");
      Serial.print(" | Blue LED Status: ");
      Serial.println(blueLedStatus ? "ON" : "OFF");
      // Delay before processing the next character
      delay(1000); // Adjust delay as needed
    }
    // Add a delay between characters for LDR to detect intensities
    delay(5000); // Adjust delay as needed
  }

  // At the end of the string long pause before looping and starting again
  LightsOff(8000);
}

// DOT
void MorseDot() {
  digitalWrite(ledRed, HIGH);   // turn the Red LED on
  digitalWrite(ledBlue, HIGH);  // turn the Blue LED on
  delay(dotLen);                // hold in this position
}

// DASH
void MorseDash() {
  digitalWrite(ledRed, HIGH);   // turn the Red LED on
  digitalWrite(ledBlue, HIGH);  // turn the Blue LED on
  delay(dashLen);               // hold in this position
}

// Turn Off
void LightsOff(int delayTime) {
  digitalWrite(ledRed, LOW);    // turn the Red LED off
  digitalWrite(ledBlue, LOW);   // turn the Blue LED off
  delay(delayTime);             // hold in this position
}

// *** Characters to Morse Code Conversion *** //
void GetChar(char tmpChar) {
  // Take the passed character and use a switch case to find the Morse code for that character
  switch (tmpChar) {
    // Morse code patterns for each character
    case 'a':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'b':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'c':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'd':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'e':
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'f':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'g':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'h':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'i':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'j':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'k':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'l':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'm':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'n':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'o':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'p':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 'q':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'r':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 's':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case 't':
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'u':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'v':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'w':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'x':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'y':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case 'z':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    // Numerics
    case '0':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case '1':
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case '2':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case '3':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case '4':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      break;
    case '5':
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case '6':
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case '7':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case '8':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    case '9':
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDash();
      LightsOff(elemPause);
      MorseDot();
      LightsOff(elemPause);
      break;
    default:
      // If a matching character was not found it will default to a blank space
      LightsOff(Spaces);
  }
}