SURYATEJA
Published © Apache-2.0

Morse Code Communication Using Laser Module (Both)

This is using the laser transmitter and receiver to communicate, and using the Morse code given by the laser transmitter to the receiver.

EasyFull instructions provided5 hours1,495
Morse Code Communication Using Laser Module (Both)

Things used in this project

Hardware components

Arduino UNO & Genuino UNO
Arduino UNO & Genuino UNO
×2
Breadboard (generic)
Breadboard (generic)
×2
Autodesk LASER TRANSMITTER
×1
Photo resistor
Photo resistor
×1
Jumper wires (generic)
Jumper wires (generic)
×1

Software apps and online services

Arduino IDE
Arduino IDE

Story

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Custom parts and enclosures

CONNECTIONS

Schematics

CONNECTIONS

Code

CODE-1- FOR CONTROLLING THE LASER EMITTER

Arduino
int led13 = 13;      // blink an led on output 13

/*
  Set the speed of your morse code
  Here are the ratios code elements:
    Dash length = Dot length x 3
    Pause between elements = Dot length    
*/
int dotLen = 200;     // 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
int wordPause = dotLen * 7;  // length of the pause between words

void setup() {                
  // initialize the digital pin as an output for LED lights.
  pinMode(led13, OUTPUT); 
}

// Create a loop of the letters/words you want to output in morse code (defined in string at top of code)
void loop()
{ 
 
  // Loop through the string and get each character one at a time until the end is reached
  for (int i = 0; i < sizeof(stringToMorseCode) - 1; 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);
  }
  
  // At the end of the string long pause before looping and starting again
  LightsOff(8000);      
}

// DOT
void MorseDot()
{
  digitalWrite(led13, HIGH);    // turn the LED on 
  delay(dotLen);              // hold in this position
}

// DASH
void MorseDash()
{
  digitalWrite(led13, HIGH);    // turn the LED on 
  delay(dashLen);               // hold in this position
}

// Turn Off
void LightsOff(int delayTime)
{
  digitalWrite(led13, LOW);     // turn the 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) {
    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;
    default: 
    // If a matching character was not found it will default to a blank space
    LightsOff(Spaces);      
  }
}

CODE-2 - FOR THE RECEIVER END

Arduino
int sensorPin = 0; // select the input pin for ldr
int sensorValue = 0; // variable to store the value coming from the sensor
int a, f; // flags
void setup() {
Serial.begin(9600); //sets serial port for communication
}
void loop() {

sensorValue = analogRead(sensorPin); // read the value from the sensor
//Serial.println(sensorValue);
if(sensorValue>1000)// calculating the number of dots and dashes
{
  for(int i=0;i<=13;i++)
  {
    sensorValue=analogRead(sensorPin);
    if(sensorValue>1000)
    {
      a++; //calculating the number of dots and dashes in the character
     delay(200);
    }
  else
  {
    f++; // calculating the number of spaces in dots and dashes
   delay(200);
  }
  
  }
}
//Serial.print("a= "+a);
//Serial.println("f= "+f);
//Serial.println();
/*
 * Checking the set of dots, dashes and spaces
 */

if(a==4 && f==10)
{
  Serial.print("a");
}
if(a==6 && f==8)
{
  Serial.print("b");
}
if(a==8 && f==6)
{
  Serial.print("c");  
}
if(a==1 && f==13)
{
  Serial.print("e");
}
if(a==2 && f==12)
{
  Serial.print("i");
}
if(a==10 && f==4)
{
  Serial.print("j");
}
if(a==7 && f==7)
{
  Serial.print("g");
}
if(a==9 && f==5)
{
  Serial.print("o");
}
if(a==3 && f==11)
{
  Serial.print("s");
}
f=a=0;
delay(200);

}

Credits

SURYATEJA

SURYATEJA

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