Arduino Cubesat (satellite) project

[Eric]

Hey guys here is the code for the project shown in my YouTube videos. I will update this as the videos come out- I think I am already on version 6 Here is the fist to get things going!

Cheers

Code: Select all

/* 
Erics DIY Satellite Project
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Website http://mkme.org

V1 Set up basic text tranmission
-Tuned speaker freq and speed

This code was adapred from:
Simple Arduino Morse Beacon
Written by Mark VandeWettering K6HX
Email: k6hx@arrl.net
http://brainwagon.org 
 
*/

int Batt1 = 7.4;// Initialize & Globalize Battery One Level

struct t_mtab { char c, pat; } ;

struct t_mtab morsetab[] = {
  	{'.', 106},
	{',', 115},
	{'?', 76},
	{'/', 41},
	{'A', 6},
	{'B', 17},
	{'C', 21},
	{'D', 9},
	{'E', 2},
	{'F', 20},
	{'G', 11},
	{'H', 16},
	{'I', 4},
	{'J', 30},
	{'K', 13},
	{'L', 18},
	{'M', 7},
	{'N', 5},
	{'O', 15},
	{'P', 22},
	{'Q', 27},
	{'R', 10},
	{'S', 8},
	{'T', 3},
	{'U', 12},
	{'V', 24},
	{'W', 14},
	{'X', 25},
	{'Y', 29},
	{'Z', 19},
	{'1', 62},
	{'2', 60},
	{'3', 56},
	{'4', 48},
	{'5', 32},
	{'6', 33},
	{'7', 35},
	{'8', 39},
	{'9', 47},
	{'0', 63}
} ;

#define N_MORSE  (sizeof(morsetab)/sizeof(morsetab[0]))

#define SPEED  (35)  //default 12 25 still stable 35 working
#define DOTLEN  (1200/SPEED)
#define DASHLEN  (3*(1200/SPEED))

int LEDpin = 3; //Needs to be PWM pin

void
dash()
{
  analogWrite(LEDpin, 128) ;//128 default
  delay(DASHLEN);
  analogWrite(LEDpin, 0) ;
  delay(DOTLEN) ;
}

void
dit()
{
  analogWrite(LEDpin, 128) ;//128 default
  delay(DOTLEN);
  analogWrite(LEDpin, 0) ;
  delay(DOTLEN);
}

void
send(char c)
{
  int i ;
  if (c == ' ') {
    Serial.print(c) ;
    delay(7*DOTLEN) ;
    return ;
  }
  for (i=0; i<N_MORSE; i++) {
    if (morsetab[i].c == c) {
      unsigned char p = morsetab[i].pat ;
      Serial.print(morsetab[i].c) ;

      while (p != 1) {
          if (p & 1)
            dash() ;
          else
            dit() ;
          p = p / 2 ;
      }
      delay(2*DOTLEN) ;
      return ;
    }
  }
  /* if we drop off the end, then we send a space */
  Serial.print("?") ;
}

void
sendmsg(char *str)
{
  while (*str)
    send(*str++) ;
  Serial.println("");
}

void setup() {
  pinMode(LEDpin, OUTPUT) ;
  Serial.begin(9600) ; //serial unnecessary except debugging as needed
  Serial.println("Eric's Arduino Satellite CW Downlink") ;
  Serial.println("by Eric William") ;
  Serial.println("www.mkmer.org") ;
  //Serial.println("") ;
}

void loop() {
  Transmit();
 }

void Transmit(){//Make sure these are all CAPS or will not TX
   sendmsg("AURORA1 SAT/") ;
   sendmsg("OS,OK/") ;
   sendmsg("SAFEMODE,NO/") ;
   sendmsg("WATCHDOG,4/") ;
   sendmsg("ITEMP,0C/ ") ;
   sendmsg("LUX,22/ ") ;
   sendmsg("TELEMETRY,OK/ ") ;
   sendmsg("ANTENNA,DEP/") ;
   sendmsg("PV,520MV/") ;
   sendmsg("BATT1,620MV/") ;
   sendmsg("BUSA,4MA/") ;
   sendmsg("RSSI,4DBM/") ;
   sendmsg("WWW.MKME.ORG...") ; //All this code needs to be replaced with the INT to CHAR values from monitoring/systems
   //sendmsg (Batt1);
  delay(3000) ;
}
void Batt(){
  //input battery check/monitoring code here
}
void Watchdog(){
  //input Watchdog code here
}
void Solar(){
  //input Solar Cell monitoring & code here
}

[Eric]

Here is V1 as well for the RTTY mode- I have since abondoned this as I couldn't get it to decode at all Maybe you will have better luck....

Code: Select all

// code adapted from www.timzaman.com
/* 
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Erics DIY Satellite Project
V1
 
*/
#include <RTTY.h>

int batt1 = 7.4;// Initialize & Globalize Battery One Level
char buffer [50];

void setup(){
Serial.begin(9600);
RTTY.attach(2,3);  
}

void loop()
{
  Batt();
  SendData();
}

void SendData(){
  RTTY.tx("Aurora-1 Satellite!");
  RTTY.tx("OS Status:OK! ");
  RTTY.tx("IntTemp-9C ");
  RTTY.tx("Telemetry-OK ");
  RTTY.tx("Downlink:Live ");
  RTTY.tx("Reboot Count-4 ");
  RTTY.tx("PanelV-5.2 ");
  RTTY.tx("Batt1=!");
  dtostrf(batt1, 2, 2, buffer);
  RTTY.tx(buffer);
  Serial.println (buffer);
  RTTY.tx("c\n");
}
void Batt(){
  //input battery check code here
}

[Eric]

Here is V2 of the Arduino satellite code. This is using CW/Morse code for downlink of telemetry. Works great so far! For now the sensors are still simulated in the code (as you can see).

In this version I implemented the watchdog function which will reset the Arduino if it becomes "stuck"

Cheers!

Code: Select all

/* 
Erics DIY Satellite Project
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Website http://mkme.org

V1 Set up basic text tranmission
-Tuned speaker freq and speed

V2 Added watchdog function

This code was adapred from:
Simple Arduino Morse Beacon
Written by Mark VandeWettering K6HX
Email: k6hx@arrl.net
http://brainwagon.org 
 
*/

int Batt1 = 7.4;// Initialize & Globalize Battery One Level

struct t_mtab { char c, pat; } ;

struct t_mtab morsetab[] = {
  	{'.', 106},
	{',', 115},
	{'?', 76},
	{'/', 41},
	{'A', 6},
	{'B', 17},
	{'C', 21},
	{'D', 9},
	{'E', 2},
	{'F', 20},
	{'G', 11},
	{'H', 16},
	{'I', 4},
	{'J', 30},
	{'K', 13},
	{'L', 18},
	{'M', 7},
	{'N', 5},
	{'O', 15},
	{'P', 22},
	{'Q', 27},
	{'R', 10},
	{'S', 8},
	{'T', 3},
	{'U', 12},
	{'V', 24},
	{'W', 14},
	{'X', 25},
	{'Y', 29},
	{'Z', 19},
	{'1', 62},
	{'2', 60},
	{'3', 56},
	{'4', 48},
	{'5', 32},
	{'6', 33},
	{'7', 35},
	{'8', 39},
	{'9', 47},
	{'0', 63}
} ;

#define N_MORSE  (sizeof(morsetab)/sizeof(morsetab[0]))

#define SPEED  (35)  //default 12 25 still stable 35 working
#define DOTLEN  (1200/SPEED)
#define DASHLEN  (3*(1200/SPEED))

int LEDpin = 3; //Needs to be PWM pin

void
dash()
{
  analogWrite(LEDpin, 128) ;//128 default
  delay(DASHLEN);
  analogWrite(LEDpin, 0) ;
  delay(DOTLEN) ;
}

void
dit()
{
  analogWrite(LEDpin, 128) ;//128 default
  delay(DOTLEN);
  analogWrite(LEDpin, 0) ;
  delay(DOTLEN);
}

void
send(char c)
{
  int i ;
  if (c == ' ') {
    Serial.print(c) ;
    delay(7*DOTLEN) ;
    return ;
  }
  for (i=0; i<N_MORSE; i++) {
    if (morsetab[i].c == c) {
      unsigned char p = morsetab[i].pat ;
      Serial.print(morsetab[i].c) ;

      while (p != 1) {
          if (p & 1)
            dash() ;
          else
            dit() ;
          p = p / 2 ;
      }
      delay(2*DOTLEN) ;
      return ;
    }
  }
  /* if we drop off the end, then we send a space */
  Serial.print("?") ;
}

void
sendmsg(char *str)
{
  while (*str)
    send(*str++) ;
  Serial.println("");
}

#include <avr/wdt.h>
void setup() {
  wdt_disable();
  wdt_enable (WDTO_8S);//watchdog
  pinMode(LEDpin, OUTPUT) ;
  Serial.begin(9600) ; //serial unnecessary except debugging as needed
  Serial.println("Eric's Arduino Satellite CW Downlink") ;
  Serial.println("by Eric William") ;
  Serial.println("www.mkmer.org") ;
  //Serial.println("") ;
}

void loop() {
  wdt_reset ();//Reset Watchdog
  Transmit();
 }

void Transmit(){//Make sure these are all CAPS or will not TX
   sendmsg("AURORA1 SAT/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("OS,OK/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("SAFEMODE,NO/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WATCHDOG,4/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ITEMP,0C/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("LUX,22/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("TELEMETRY,OK/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ANTENNA,DEP/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("PV,520MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BATT1,620MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BUSA,4MA/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("RSSI,4DBM/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WWW.MKME.ORG...") ; //All this code needs to be replaced with the INT to CHAR values from monitoring/systems
   //sendmsg (Batt1);
  delay(3000) ;
}
void Batt(){
  //input battery check/monitoring code here
}
void Watchdog(){
  //input Watchdog code here
}
void Solar(){
  //input Solar Cell monitoring & code here
}

[Eric]

V3 of the downlink transmitter code- added tone output mode

Code: Select all

/* 
Erics DIY Satellite Project
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Website http://mkme.org

V1 Set up basic text tranmission
-Tuned speaker freq and speed

V2 Added watchdog function

V3- Added concept to hear the sound of space!  
Take sensor input such as radiation or light level and map to tone output
Currently Mapping Analog pin 0

This code was adapted from:
Simple Arduino Morse Beacon
Written by Mark VandeWettering K6HX
Email: k6hx@arrl.net
http://brainwagon.org 
 
*/
int SPKpin = 3; //Needs to be PWM pin
int Batt1 = 7.4;// Initialize & Globalize Battery One Level
int TXmode=1;//Toggle TX mode between CW and Tone
int val;

struct t_mtab { char c, pat; } ;
struct t_mtab morsetab[] = {
  	{'.', 106},
	{',', 115},
	{'?', 76},
	{'/', 41},
	{'A', 6},
	{'B', 17},
	{'C', 21},
	{'D', 9},
	{'E', 2},
	{'F', 20},
	{'G', 11},
	{'H', 16},
	{'I', 4},
	{'J', 30},
	{'K', 13},
	{'L', 18},
	{'M', 7},
	{'N', 5},
	{'O', 15},
	{'P', 22},
	{'Q', 27},
	{'R', 10},
	{'S', 8},
	{'T', 3},
	{'U', 12},
	{'V', 24},
	{'W', 14},
	{'X', 25},
	{'Y', 29},
	{'Z', 19},
	{'1', 62},
	{'2', 60},
	{'3', 56},
	{'4', 48},
	{'5', 32},
	{'6', 33},
	{'7', 35},
	{'8', 39},
	{'9', 47},
	{'0', 63}
} ;

#define N_MORSE  (sizeof(morsetab)/sizeof(morsetab[0]))
#define SPEED  (35)  //default 12 25 still stable 35 working
#define DOTLEN  (1200/SPEED)
#define DASHLEN  (3*(1200/SPEED))

void
dash()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DASHLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN) ;
}
void
dit()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DOTLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN);
}
void
send(char c)
{
  int i ;
  if (c == ' ') {
    Serial.print(c) ;
    delay(7*DOTLEN) ;
    return ;
  }
  for (i=0; i<N_MORSE; i++) {
    if (morsetab[i].c == c) {
      unsigned char p = morsetab[i].pat ;
      Serial.print(morsetab[i].c) ;

      while (p != 1) {
          if (p & 1)
            dash() ;
          else
            dit() ;
          p = p / 2 ;
      }
      delay(2*DOTLEN) ;
      return ;
    }
  }
  /* if we drop off the end, then we send a space */
  Serial.print("?") ;
}
void
sendmsg(char *str)
{
  while (*str)
    send(*str++) ;
  Serial.println("");
}

#include <avr/wdt.h>
void setup() {
  wdt_disable();
  wdt_enable (WDTO_8S);//watchdog
  pinMode(SPKpin, OUTPUT) ;
  Serial.begin(9600) ; //serial unnecessary except debugging as needed
  Serial.println("Eric's Arduino Satellite CW Downlink") ;
  Serial.println("by Eric William") ;
  Serial.println("www.mkmer.org") ;
  //Serial.println("") ;
}

void loop() {
  wdt_reset ();//Reset Watchdog
  if (TXmode ==1) TransmitMorse();//Send CW
  else TransmitTone(); //Send Tone based on sensor reading
}

void TransmitMorse(){//Make sure these are all CAPS or will not TX
   sendmsg("AURORA1 SAT/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("OS,OK/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("SAFEMODE,NO/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WATCHDOG,4/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ITEMP,0C/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("LUX,22/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("TELEMETRY,OK/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ANTENNA,DEP/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("PV,520MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BATT1,620MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BUSA,4MA/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("RSSI,4DBM/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WWW.MKME.ORG...") ; //All this code needs to be replaced with the INT to CHAR values from monitoring/systems
   //sendmsg (Batt1);
   delay(3000) ;
}
void Batt(){
  //input battery check/monitoring code here
}
void Watchdog(){
  //input Watchdog code here
}
void Solar(){
  //input Solar Cell monitoring & code here
}
  
void TransmitTone(){
//Input code here to translate a sensor reading to a tone output so people can "hear space"
val=analogRead(0);//Sensor to use for tone
val = map(val, 0, 1024, 100, 200); //(First two are input limits from the sensor- second 2 are the pwm out
analogWrite(SPKpin, val) ;//Send PWM to create tone
}  

[Eric]

V4 of the Arduino satellite code. Fixed to toggle between CW and Tone downlink modes! Cheers

Code: Select all

/* 
Erics DIY Satellite Project
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Website http://mkme.org

V1 Set up basic text tranmission
-Tuned speaker freq and speed

V2 Added watchdog function

V3- Added concept to hear the sound of space!  
Take sensor input such as radiation or light level and map to tone output
Currently Mapping Analog pin 0

V4 Toggle TX mode (CW vs Tone) with millis
Interval is used for length of time to send tone
Satellite now transmits full CW downlink then tone for duration of "Interval"

*********************************************
Notes for DEV:
Add code for external LED to indicate operational state
External LEDs could also flash an error code if system probelm
**********************************************

This code was adapted from:
Simple Arduino Morse Beacon
Written by Mark VandeWettering K6HX
Email: k6hx@arrl.net
http://brainwagon.org 
 
*/
int SPKpin = 3; //Needs to be PWM pin for spk/radio output
int Batt1 = 7.4;// Initialize & Globalize Battery One Level
int TXmode=LOW;//Toggle TX mode between CW and Tone
int val;//used for sensor to tone mapping
long previousMillis = 0; //millis used for time before toggle TX mode
long interval = 5000; // interval (milliseconds) for transmit tone mode (transmit mode toggle)

struct t_mtab { char c, pat; } ;
struct t_mtab morsetab[] = {
  	{'.', 106},
	{',', 115},
	{'?', 76},
	{'/', 41},
	{'A', 6},
	{'B', 17},
	{'C', 21},
	{'D', 9},
	{'E', 2},
	{'F', 20},
	{'G', 11},
	{'H', 16},
	{'I', 4},
	{'J', 30},
	{'K', 13},
	{'L', 18},
	{'M', 7},
	{'N', 5},
	{'O', 15},
	{'P', 22},
	{'Q', 27},
	{'R', 10},
	{'S', 8},
	{'T', 3},
	{'U', 12},
	{'V', 24},
	{'W', 14},
	{'X', 25},
	{'Y', 29},
	{'Z', 19},
	{'1', 62},
	{'2', 60},
	{'3', 56},
	{'4', 48},
	{'5', 32},
	{'6', 33},
	{'7', 35},
	{'8', 39},
	{'9', 47},
	{'0', 63}
} ;

#define N_MORSE  (sizeof(morsetab)/sizeof(morsetab[0]))
#define SPEED  (30)  //default 12 25 still stable 35 working
#define DOTLEN  (1200/SPEED)
#define DASHLEN  (3*(1200/SPEED))

void
dash()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DASHLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN) ;
}
void
dit()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DOTLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN);
}
void
send(char c)
{
  int i ;
  if (c == ' ') {
    Serial.print(c) ;
    delay(7*DOTLEN) ;
    return ;
  }
  for (i=0; i<N_MORSE; i++) {
    if (morsetab[i].c == c) {
      unsigned char p = morsetab[i].pat ;
      Serial.print(morsetab[i].c) ;

      while (p != 1) {
          if (p & 1)
            dash() ;
          else
            dit() ;
          p = p / 2 ;
      }
      delay(2*DOTLEN) ;
      return ;
    }
  }
  /* if we drop off the end, then we send a space */
  Serial.print("?") ;
}
void
sendmsg(char *str)
{
  while (*str)
    send(*str++) ;
  Serial.println("");
}

#include <avr/wdt.h>
void setup() {
  wdt_disable();
  wdt_enable (WDTO_8S);//watchdog
  pinMode(SPKpin, OUTPUT) ;
  Serial.begin(9600) ; //serial unnecessary except debugging as needed
  Serial.println("Eric's Arduino Satellite CW Downlink") ;
  Serial.println("by Eric William") ;
  Serial.println("www.mkmer.org") ;
  //Serial.println("") ;
}

void loop() {
  wdt_reset ();//Reset Watchdog
  unsigned long currentMillis = millis();//millis counter for length of time in tone transmit mode
  if(currentMillis - previousMillis > interval) {
    // save the last time toggled state
    previousMillis = currentMillis;
    // toggle TX state
    if (TXmode == LOW)
     TXmode = HIGH;
    else
     TXmode = LOW;
    }

if (TXmode ==HIGH) TransmitMorse();//Send CW
else TransmitTone(); //Tone transmit mode based on sensor reading
}

void TransmitMorse(){//Make sure these are all CAPS or will not TX
   sendmsg("?????") ; //Preamble to begin receiving
   wdt_reset ();//Reset Watchdog
   sendmsg("AURORA1 SAT/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("OS,OK/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("SAFEMODE,NO/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WATCHDOG,4/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ITEMP,0C/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("LUX,22/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("TELEMETRY,OK/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ANTENNA,DEP/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("PV,520MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BATT1,620MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BUSA,4MA/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("RSSI,4DBM/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WWW.MKME.ORG...") ; //All this code needs to be replaced with the INT to CHAR values from monitoring/systems
   //sendmsg (Batt1);
   delay(3000) ;
}
void Batt(){
  //input battery check/monitoring code here
}
void Watchdog(){
  //input Watchdog code here
}
void Solar(){
  //input Solar Cell monitoring & code here
}
  
void TransmitTone(){//Transmit tone based on sensor value- so people can hear space!
val=analogRead(0);//Sensor to use for tone
val = map(val, 0, 1024, 100, 200); //(First two are input limits from the sensor- second 2 are the pwm out
analogWrite(SPKpin, val) ;//Send PWM to create tone
}  

[Eric]

Version 5 of my Arduino Satellite down link code using CW/Morse. This version I just cleaned up the code and broke out some nicer separate voids for easy execution and user integration. Enjoy!

Code: Select all

/* 
Erics DIY Satellite Project
My Youtube Channel  : http://www.youtube.com/user/Shadow5549
Website http://mkme.org

V1 Set up basic text tranmission
-Tuned speaker freq and speed

V2 Added watchdog function

V3- Added concept to hear the sound of space!  
Take sensor input such as radiation or light level and map to tone output
Currently Mapping Analog pin 0

V4 Toggle TX mode (CW vs Tone) with millis
Interval is used for length of time to send tone
Satellite now transmits full CW downlink then tone for duration of "Interval"

V5- Code cleanup.  Broke out into separate voids
*********************************************
Notes for DEV:
Add code for external LED to indicate operational state
External LEDs could also flash an error code if system probelm
**********************************************

This code was adapted from:
Simple Arduino Morse Beacon
Written by Mark VandeWettering K6HX
Email: k6hx@arrl.net
http://brainwagon.org 
 
*/
int SPKpin = 3; //Needs to be PWM pin for spk/radio output
int Batt1 = 7.4;// Initialize & Globalize Battery One Level
int TXmode=LOW;//Toggle TX mode between CW and Tone
int val;//used for sensor to tone mapping
long previousMillis = 0; //millis used for time before toggle TX mode
long interval = 5000; // interval (milliseconds) for transmit tone mode (transmit mode toggle)

struct t_mtab { char c, pat; } ;
struct t_mtab morsetab[] = {
  	{'.', 106},
	{',', 115},
	{'?', 76},
	{'/', 41},
	{'A', 6},
	{'B', 17},
	{'C', 21},
	{'D', 9},
	{'E', 2},
	{'F', 20},
	{'G', 11},
	{'H', 16},
	{'I', 4},
	{'J', 30},
	{'K', 13},
	{'L', 18},
	{'M', 7},
	{'N', 5},
	{'O', 15},
	{'P', 22},
	{'Q', 27},
	{'R', 10},
	{'S', 8},
	{'T', 3},
	{'U', 12},
	{'V', 24},
	{'W', 14},
	{'X', 25},
	{'Y', 29},
	{'Z', 19},
	{'1', 62},
	{'2', 60},
	{'3', 56},
	{'4', 48},
	{'5', 32},
	{'6', 33},
	{'7', 35},
	{'8', 39},
	{'9', 47},
	{'0', 63}
} ;

#define N_MORSE  (sizeof(morsetab)/sizeof(morsetab[0]))
#define SPEED  (30)  //default 12 25 still stable 35 working
#define DOTLEN  (1200/SPEED)
#define DASHLEN  (3*(1200/SPEED))

void
dash()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DASHLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN) ;
}
void
dit()
{
  analogWrite(SPKpin, 128) ;//128 default
  delay(DOTLEN);
  analogWrite(SPKpin, 0) ;
  delay(DOTLEN);
}
void
send(char c)
{
  int i ;
  if (c == ' ') {
    Serial.print(c) ;
    delay(7*DOTLEN) ;
    return ;
  }
  for (i=0; i<N_MORSE; i++) {
    if (morsetab[i].c == c) {
      unsigned char p = morsetab[i].pat ;
      Serial.print(morsetab[i].c) ;

      while (p != 1) {
          if (p & 1)
            dash() ;
          else
            dit() ;
          p = p / 2 ;
      }
      delay(2*DOTLEN) ;
      return ;
    }
  }
  /* if we drop off the end, then we send a space */
  Serial.print("?") ;
}
void
sendmsg(char *str)
{
  while (*str)
    send(*str++) ;
  Serial.println("");
}
#include <avr/wdt.h>

void setup() {
  wdt_disable();
  wdt_enable (WDTO_8S);//watchdog
  pinMode(SPKpin, OUTPUT) ;
  Serial.begin(9600) ; //serial unnecessary except debugging as needed
  Serial.println("Eric's Arduino Satellite CW Downlink") ;
  Serial.println("by Eric William") ;
  Serial.println("www.mkmer.org") ;
  //Serial.println("") ;
  }

void loop() {
  wdt_reset ();//Reset Watchdog
  //checksensors(); check sensor readings here
  decidemode();//decide mode of transmit: CW vs Tone depednding on interval
  //modeindicator(); add mode indicator LED etc here
  initiateTX();//Initiate the decided form of TX and proceeds to approprite TX void
  }

void decidemode(){
  unsigned long currentMillis = millis();//millis counter for length of time in tone transmit mode
  if(currentMillis - previousMillis > interval) {
   // save the last time toggled state
   previousMillis = currentMillis;
   // toggle TX state
   if (TXmode == LOW)
   TXmode = HIGH;
   else
   TXmode = LOW;
   }
  }
void initiateTX(){
  if (TXmode ==HIGH) TransmitMorse();//Send CW
  else TransmitTone(); //Tone transmit mode based on sensor reading
  }

void TransmitMorse(){//Make sure these are all CAPS or will not TX
   sendmsg("?????") ; //Preamble to begin receiving
   wdt_reset ();//Reset Watchdog
   sendmsg("AURORA1 SAT/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("OS,OK/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("SAFEMODE,NO/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WATCHDOG,4/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ITEMP,0C/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("LUX,22/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("TELEMETRY,OK/ ") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("ANTENNA,DEP/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("PV,520MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BATT1,620MV/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("BUSA,4MA/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("RSSI,4DBM/") ;
   wdt_reset ();//Reset Watchdog
   sendmsg("WWW.MKME.ORG...") ; //All this code needs to be replaced with the INT to CHAR values from monitoring/systems
   //sendmsg (Batt1);
   delay(3000) ;
   }
void Batt(){
  //input battery check/monitoring code here
  }
void Watchdog(){
  //input Watchdog code here
  }
void Solar(){
  //input Solar Cell monitoring & code here
  }
  
void TransmitTone(){//Transmit tone based on sensor value- so people can hear space!
  val=analogRead(0);//Sensor to use for tone
  val = map(val, 0, 1024, 100, 200); //(First two are input limits from the sensor- second 2 are the pwm out
  analogWrite(SPKpin, val) ;//Send PWM to create tone
  }  

[Eric]

By popular request- here is the link to the files on my GitHub. https://github.com/MKme/Arduino-Satellite

Some solar panels just arrived so I may pick this project back up. I was hoping to laser cut a new frame but I cant seem to find a decent 1U laser template or SVG files. Still looking though.