Arduino Projects | Mark-Rodgers

Category Archives: Arduino Projects

Automatic HF Antenna Switch using Arduino

November 20, 2012 MRodgers No comments

This is a project I worked on a while ago, but never finished it due to time. I will update my site or this post when I get it working how I want.

This code is free to use and edit, as long as the credit to me is left at the top. Thanks.
I don’t remember if I ever got the band to save, so that might not be working.
You should expect to edit or add to the “void BandSetup()” section.
You can also hard-code the band to a relay setting.
I never got around to setting up outputs for the relays, but that should be simple to add.

/* HF Band Detecting Auto Antenna Switch
   Designed by
   KC8GRQ - Mark Rodgers
*/   

#include <LiquidCrystal.h>
LiquidCrystal lcd(8, 9, 10, 11, 12, 13);
#define A 2 
#define B 3
#define C 4
#define D 5

#define Select 6
#define Next 7

int AntennaPort = '1';  
int Band = '0'; 

void setup() 
{

  pinMode(A, INPUT);
  pinMode(B, INPUT);
  pinMode(C, INPUT);
  pinMode(D, INPUT);
  pinMode(Select, INPUT);
  pinMode(Next, INPUT);
//  digitalWrite(Select, LOW);
//  digitalWrite(Next, LOW);

  lcd.begin(20, 4);

  // Print a message to the LCD.
  lcd.setCursor(0, 0);
  lcd.print("Auto Antenna Switch ");
  lcd.setCursor(0, 2);
  lcd.print("       KC8GRQ       ");       
  delay(3000);
  lcd.clear();

} 

void ReadRadio()
{
digitalRead(A);
digitalRead(B);
digitalRead(C);
digitalRead(D);

if (digitalRead(A) == LOW && digitalRead(B) == LOW && digitalRead(C) == LOW && digitalRead(D) == HIGH)
     {   lcd.setCursor(0, 0);
         lcd.print("     160 Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print("   1.8 to 2.0 Mhz   "); 
         lcd.print(" Random Legth Wire  ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == LOW && digitalRead(C) == HIGH && digitalRead(D) == LOW)
     {   lcd.setCursor(0, 0);
         lcd.print("     80  Meters     "); 
         lcd.setCursor(0, 1);
         lcd.print("   3.5 to 4.0 Mhz   "); 
         lcd.print(" G5RV   East / West ");  }
     else if
   (digitalRead(A) == HIGH && digitalRead(B) == LOW && digitalRead(C) == HIGH && digitalRead(D) == LOW)
     {   lcd.setCursor(0, 0);
         lcd.print("     60  Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print(" 5.330 - 5.403 Mhz  "); 
         lcd.print(" G5RV   East / West ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == LOW && digitalRead(C) == HIGH && digitalRead(D) == HIGH)
     {   lcd.setCursor(0, 0);
         lcd.print("     40  Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print("   7.0 to 7.3 Mhz   "); 
         lcd.print(" G5RV   East / West ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == HIGH && digitalRead(C) == LOW && digitalRead(D) == LOW)
     {   lcd.setCursor(0, 0);
         lcd.print("     30  Meters     "); 
         lcd.setCursor(0, 1);
         lcd.print(" 10.1 to 10.15 Mhz  ");  
         lcd.print(" Triband 3 EL Yagi  ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == HIGH && digitalRead(C) == LOW && digitalRead(D) == HIGH)
     {   lcd.setCursor(0, 0);
         lcd.print("     20  Meters     ");
         lcd.setCursor(0, 1);
         lcd.print(" 14.0 to 14.35 Mhz  ");     
         lcd.print(" Triband 3 EL Yagi  ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == HIGH && digitalRead(C) == HIGH && digitalRead(D) == LOW)
     {   lcd.setCursor(0, 0);
         lcd.print("     17  Meters     "); 
         lcd.setCursor(0, 1);
         lcd.print("18.068 to 18.168 Mhz");  
         lcd.print(" Triband 3 EL Yagi  ");  }
     else if
   (digitalRead(A) == LOW && digitalRead(B) == HIGH && digitalRead(C) == HIGH && digitalRead(D) == HIGH)
     {   lcd.setCursor(0, 0);
         lcd.print("     15  Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print(" 21.0 to 21.45 Mhz  "); 
         lcd.print(" Triband 3 EL Yagi  ");  }
     else if
   (digitalRead(A) == HIGH && digitalRead(B) == LOW && digitalRead(C) == LOW && digitalRead(D) == LOW)
     {   lcd.setCursor(0, 0);
         lcd.print("     12  Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print(" 24.89 to 24.99 Mhz "); 
         lcd.print(" 10 / 12  Vertical  ");  }
     else if
   (digitalRead(A) == HIGH && digitalRead(B) == LOW && digitalRead(C) == LOW && digitalRead(D) == HIGH)
     {   lcd.setCursor(0, 0);
         lcd.print("     10  Meters     ");  
         lcd.setCursor(0, 1);
         lcd.print("  28.0 to 29.7 Mhz  "); 
         lcd.print(" 10 / 12  Vertical  ");  }

    else
     {   lcd.setCursor(0, 0);
         lcd.print("   **  ERROR  **    ");  
         lcd.setCursor(0, 1);
         lcd.print("  No  Radio  Data   ");  
         lcd.setCursor(0, 2);
         lcd.print("                    ");  
         lcd.setCursor(0, 3);
         lcd.print("Check Wiring & Radio");  }
}  

void BandSetup()
{   
  lcd.setCursor(0, 0);
  lcd.print("  *  Setup Mode  *  ");
  lcd.setCursor(0, 1);
  lcd.print("Band: ");
  lcd.setCursor(6, 1);
  if (Band == '0') {  lcd.print("160 Meters"); }  else 
  if (Band == '1') {  lcd.print("80 Meters "); }  else
  if (Band == '2') {  lcd.print("60 Meters "); }  else
  if (Band == '3') {  lcd.print("40 Meters "); }  else
  if (Band == '4') {  lcd.print("30 Meters "); }  else
  if (Band == '5') {  lcd.print("20 Meters "); }  else
  if (Band == '6') {  lcd.print("17 Meters "); }  else
  if (Band == '7') {  lcd.print("15 Meters "); }  else
  if (Band == '8') {  lcd.print("12 Meters "); }  else
  if (Band == '9') {  lcd.print("10 Meters "); }  

// Scroll Thru The Bands  
  if (Band > '9') {
      Band = '0';
      }
  if (digitalRead(Next) == HIGH) {
      Band++; }

// The band is selected that we want to edit, now set AntennaPort  

  if (digitalRead(Select) == HIGH) { 
  lcd.setCursor(0, 2);
  lcd.print("Antenna Port # ");
  lcd.setCursor(16, 2);
  lcd.write(AntennaPort);

  // Scroll Thru The Antenna Ports 
  if (AntennaPort > '4') {
      AntennaPort = '1';
      }
  if (digitalRead(Next) == HIGH) {
      AntennaPort++; }
    }

// OK, now we have set the Band to the Antenna Port, lets save it.     
  if (digitalRead(Select) == HIGH) { 
      lcd.setCursor(0, 3);
      lcd.print(" * Settings Saved * "); }

}

void loop()
{

 // ReadRadio();

//  if (digitalRead(Select) == HIGH) {  BandSetup(); }

  lcd.setCursor(0, 0);
  lcd.print("  *  Setup Mode  *  ");
  lcd.setCursor(0, 1);
  lcd.print("Band: ");
  lcd.setCursor(6, 1);
  if (Band == '0') {  lcd.print("160 Meters"); }  else 
  if (Band == '1') {  lcd.print("80 Meters "); }  else
  if (Band == '2') {  lcd.print("60 Meters "); }  else
  if (Band == '3') {  lcd.print("40 Meters "); }  else
  if (Band == '4') {  lcd.print("30 Meters "); }  else
  if (Band == '5') {  lcd.print("20 Meters "); }  else
  if (Band == '6') {  lcd.print("17 Meters "); }  else
  if (Band == '7') {  lcd.print("15 Meters "); }  else
  if (Band == '8') {  lcd.print("12 Meters "); }  else
  if (Band == '9') {  lcd.print("10 Meters "); }  

// Scroll Thru The Bands  
  if (Band > '9') {
      Band = '0';
      }
  if (digitalRead(Next) == HIGH) {
      Band++; }

// The band is selected that we want to edit, now set AntennaPort  

  if (digitalRead(Select) == HIGH) { 
  lcd.setCursor(0, 2);
  lcd.print("Antenna Port # ");
  lcd.setCursor(16, 2);
  lcd.write(AntennaPort);

  // Scroll Thru The Antenna Ports 
  if (AntennaPort > '4') {
      AntennaPort = '1';
      }
  if (digitalRead(Next) == HIGH) {
      AntennaPort++; }
    }

// OK, now we have set the Band to the Antenna Port, lets save it.     
  if (digitalRead(Select) == HIGH) { 
      lcd.setCursor(0, 3);
      lcd.print(" * Settings Saved * "); }

}

Fox Hunt Beacon

March 21, 2012 MRodgers 6 Comments

A few months ago, I wrote some code for my Arduino board, to act as a Amateur Radio Fox Hunt Beacon. It is made to act as the hidden transmitter setup. Last week I was contacted by Dennis, N8ERF, asking if he could use the setup I had. He was doing a Fox Hunt for the school radio class that he teaches. I loaned him my Arduino board and a Yaesu VX-1, micro sized HT. It was set on low power with 200mw.

Today he held the Fox Hunt at the school. Unfortunately I couldn’t make it, since me kids get off the bus at the time he does the class. He Emailed me today and said it went well. They had 4 teams searching for the “Fox”. They want to do another hunt next week, with 2 hidden transmitters.

I have been asked by some other Hams to provide the code I used. Below is the Arduino sketch I have written.

/*
Foxhunt IDer
Written by
Mark Rodgers - KC8GRQ

http://Mark-Rodgers.com


http://Mark-Rodgers.com/fox-hunt-beacon

Morse blinker/sounder
Written By KB3VCQ
*/

// Global variables

boolean done = false; // initialize a Boolean flag if we don't want to endlessly loop

#define PTT_Low 2  // Transmitter PTT. If PTT goes LOW, use PIN 2
#define PTT_High 3  // Transmitter PTT. If PTT goes HIGH, use PIN 3
#define FOUND 4 // This is the IM FOUND button. Keep LOW for off. Switch HIGH for FOUND Tone Activation.
#define LED 13
#define SPEAKER 6  // Audio out to radio
#define TONE 600.0   // Tone of CWID
#define USESPEAKER true  

#define intracharacter 3 // delay between characters
#define dot 1 // length of a dit -- 1 unit
#define dash 3 // length of a dah
#define eow 7 // length at end of word
#define fiveWPM 240 // milliseconds for 5 wpm (based on sending PARIS 5 times for a total of 250 units)
#define wpm 15 // *** SET THIS TO YOUR DESIRED SPEED ***
#define speed fiveWPM / (wpm / 5) // multiplier to apply to 5 wpm rate. 2 = 10wpm, 2.5 = 15wmp, etc.

// CHANGE THESE SETTINGS
// CHANGE THESE SETTINGS

char send[] = "KC8GRQ FOXHUNT TRANSMITTER";  // SET THIS TO THE CW STRING YOU WANT TO SEND -- MUST BE UPPRCASE ***
int timer = 10; // Set the time between transmissions in SECONDS
char PTT_Setting = LOW; // Set how your radio transmits.     Low = PTT goes LOW.       High = PTT goes HIGH

// CHANGE THESE SETTINGS
// CHANGE THESE SETTINGS

int tx_hold = timer*1000;

// Morse code tokens. 0 = dit, 1 = dah any other character will generate 8 dit error. 

// NOTE: These need to be in ASCII code sequence to work

char tokens [][7] = { "110011","100001", // ,,-
"010101","10010", // .,/
"11111","01111","00111","00011","00001","00000", // 0,1,2,3,4,5
"10000","11000","11100","11110", // 6,7,8,9
"111000","10101","<", // :,;,<
"=",">","001100", // =,>,?
"@", // @,
"01","1000","1010", // A,B,C
"100","0","0010", // D,E,F
"110","0000","00", // G,H,I
"0111","101","0100", // J,K,L
"11","10","111", // M,N,O
"0110","1101","010", // P,Q,R
"000","1","001", // S,T,U
"0001","011","1001", // V,W,X
"1011","1100"}; // Y,Z }
;

// Arduino setup routine
void setup()

{

pinMode(SPEAKER,OUTPUT);
pinMode(PTT_Low, OUTPUT);
pinMode(PTT_High, OUTPUT);
pinMode(FOUND, INPUT);
digitalWrite(PTT_Low, HIGH); // Sets the PTT to OFF when its not supposed to TX
digitalWrite(PTT_High, LOW); // Sets the PTT to OFF when its not supposed to TX
}

// Routine to output a dit
void dit()
{
if (USESPEAKER)
{
tone(SPEAKER,TONE, dot * speed);
delay(dot * speed); }
else
{
digitalWrite(LED, HIGH); // set the LED on
delay(dot * speed); // wait for a dot's worth
digitalWrite(LED, LOW); // set the LED off
}

delay(speed);
}

// Routine to output a dah
void dah()
{
if (USESPEAKER)
{
tone(SPEAKER,TONE, dash * speed);
delay(dash * speed);
}
else
{
digitalWrite(LED, HIGH); // set the LED on
delay(dash * speed); // wait for a dah's worth
digitalWrite(LED, LOW); // set the LED off
}
delay(speed);
}

// Intracharacter delay
void ic()
{
digitalWrite(LED, LOW); // set the LED off
delay (intracharacter * speed); // wait for a half second
}

// a space is 7 units of off based on speed
void spaceCharacter()
{
digitalWrite(LED, LOW); // set the LED off
delay((eow * speed) + (intracharacter * speed)); // wait for 7 units
}

// Send a CW error for unknown characters
void error()
{
for (int i = 0; i < 8; i++)
{
dit();
}
ic();
}

// Look up a character in the tokens array and send it
void send_element(int c)
{
char token_to_send[7]; // allocate space for the token
strcpy(token_to_send,tokens[c]); // copy the token from the table into our variable

int len = strlen(token_to_send); // figure out how many dit dahs are in it
for (int i = 0; i < len; i++) // for each item in the token
{
if (token_to_send[i] == '0') // if its a 0
{
dit(); // send a dit
}
else if (token_to_send[i] == '1')
{
dah(); // otherwise we send a dah
}
else
{
error(); // we don't have a valid morse token
}
}
ic(); // after each character there is an intercharacter delay
}

// The main send routine. Pull each character apart and determine its corresponding token.
void send_code()
{
int len = strlen(send); // get the length of the string to send
int c;

for (int i = 0; i < len; i++) // loop thru each character in the string to send
{
c = send[i]; // get the ASCII integer value of the character
if (c == ' ') // see if we are between words
{
spaceCharacter(); // send a space
}
else
{
c -= ','; // offset it by the lowest ASCII character in the tokens table (a comma)
send_element(c); // send that element from the token array

}

}
}

void startup_tones()
{
tone(SPEAKER,300,500);
delay(1000);
tone(SPEAKER,350,500);
delay(1000);
tone(SPEAKER,400,500);
delay(1000);
tone(SPEAKER,450,500);
delay(1000);
tone(SPEAKER,500,500);
delay(1000);
tone(SPEAKER,550,500);
delay(1000);
tone(SPEAKER,600,500);
delay(1000);
tone(SPEAKER,650,500);
delay(1000);
tone(SPEAKER,700,500);
delay(1000);
tone(SPEAKER,750,500);
delay(1000);
tone(SPEAKER,800,500);
};

void found_tones()
{
tone(SPEAKER,400,500);
delay(130);
tone(SPEAKER,600,500);
delay(130);
tone(SPEAKER,800,500);
delay(800);
tone(SPEAKER,400,500);
delay(130);
tone(SPEAKER,600,500);
delay(130);
tone(SPEAKER,800,500);
delay(800);
tone(SPEAKER,400,500);
delay(130);
tone(SPEAKER,600,500);
delay(130);
tone(SPEAKER,800,500);
delay(3000);
};

// The Arduino main run loop
void loop()

{
if (!done) // see if we are done the loop
{

digitalWrite(PTT_Low, LOW);    // Enable PTT for "Low" type radios
digitalWrite(PTT_High, HIGH);  // Enable PTT for "High" type radios
delay(2000); // Wait 2 seconds to allow radio to Key Up
startup_tones(); // Play the startup tones
delay(3000);  // Wait 3 seconds
if (digitalRead(FOUND) == HIGH) { found_tones();  };  // Check to see if FOUND button was pressed, if YES, then play tones
send_code(); // send the string
spaceCharacter(); // make sure we have a space if we loop around to the beginning
delay(1000); // Wait 1 second to allow radio to UnKey
digitalWrite(PTT_Low, HIGH);  // Disable PTT for "Low" type radios
digitalWrite(PTT_High, LOW);  // Disable PTT for "High" type radios

// Multiple delays are used below, since the code doesnt like to run long delays. Use multiples for more time.
delay(tx_hold);  // Delay between transmissions, set above in config area
delay(tx_hold);  // Delay between transmissions, set above in config area
//delay(tx_hold);  // Delay between transmissions, set above in config area
//delay(tx_hold);  // Delay between transmissions, set above in config area
//delay(tx_hold);  // Delay between transmissions, set above in config area
done = false; // Uncomment to set our flag to finish sending
}

}

Automatic Frequency Tuning via Arduino and GPS

January 04, 2012 MRodgers No comments

I was thinking of new ideas to mod / incorporate an Arduino with Ham Radio. My latest idea is to use it to store and “automatically” change the frequency of your mobile radio, while traveling.

Satellite Antenna Rotor Controller Ideas

August 31, 2011 MRodgers 1 Comment

Im looking to build the ultimate Satellite Tracking antenna rotor setup.
This would be based off a dual Arduino Amtel 328 microprocessors. One for inside, one for outside controllers.

Arduino Fire Pager Encoder

August 28, 2011 MRodgers 1 Comment

I got my new Arduino it in the mail today and started playing with it.
My 1st project making a encoder that could send the 2-Tone audio to alert Fire Dept voice pagers, if there ever was an emergency and the fire dispatch tower went down. An ARES or RACES group working with the EOC or 911 dispatch center could easily implement this backup type paging encoder.