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<h3>Serial Commands</h3>
<p>The controller serial interface operates at 57600 baud that can be accessed using any serial TTY interface program such as PuTTY or Arduino's own Serial Monitor tool. It provides a command prompt > indicating that it is ready to receive recognized the following commands.<p>
<pre><p><b>> CAL [num]</b> <= <i>* Sets the clock calibration for precise timing</i><br>
<p><b>> CAL</b> <= <i>Displays the clock calibration setting</i><br>
<p><b>> DIP [val]</b> <= <i>* Sets the competition format, overriding the DIP switch settings<br>
<p><b>> DIP</b> <= <i>Displays the competition format setting<br>
<p><b>> FAC</b> <= <i>Sets saved EEPROM values to their original defaults</i><br>
<p><b>> GO</b> <= <i>Starts operation from zero seconds, equivalent to pressing the synch button</i><br>
<p><b>> ID [string]</b> <= <i>* Sets the callsign that gets sent</i><br>
<p><b>> ID</b> <= <i>Displays the saved callsign setting</i><br>
<p><b>> LED [on|off]</b> <= <i>* Turns on/off LED pin</i><br>
<p><b>> LED</b> <= <i>Displays the LED pin setting</i><br>
<p><b>> RST</b> <= <i>Resets the processor</i><br>
<p><b>> SPD ID [num]</b> <= <i>* Sets the ID code speed in WPM<br>
<p><b>> SPD</b> <= <i>Displays the ID code speed setting<br>
<p><b>> STA [on|off]</b> <= <i>* Turns on/off the starting tones function</i><br>
<p><b>> STA</b> <= <i>Displays the starting tones setting</i><br>
<p><b>> SYN [on|off]</b> <= <i>* Turns on/off synchronization using sync button or "GO" command</i><br>
<p><b>> SYN</b> <= <i>Displays the synchronization setting</i><br>
<p><b>> TEM</b> <= <i>Displays the processor's temperature in C</i><br>
<p><b>> VER</b> <= <i>Displays the software version number</i><br>
<p/></pre>
<pre><p><b>> CAL [num]</b> <= <i>* Sets the clock calibration for precise timing</i><br></p>
<p><b>> CAL</b> <= <i>Displays the clock calibration setting</i><br></p>
<p><b>> DIP [val]</b> <= <i>* Sets the competition format, overriding the DIP switch settings<br></p>
<p><b>> DIP</b> <= <i>Displays the competition format setting<br></p>
<p><b>> FAC</b> <= <i>Sets saved EEPROM values to their original defaults</i><br></p>
<p><b>> GO</b> <= <i>Starts operation from zero seconds, equivalent to pressing the synch button</i><br></p>
<p><b>> ID [string]</b> <= <i>* Sets the callsign that gets sent</i><br></p>
<p><b>> ID</b> <= <i>Displays the saved callsign setting</i><br></p>
<p><b>> LED [on|off]</b> <= <i>* Turns on/off LED pin</i><br></p>
<p><b>> LED</b> <= <i>Displays the LED pin setting</i><br></p>
<p><b>> RST</b> <= <i>Resets the processor</i><br></p>
<p><b>> SPD ID [num]</b> <= <i>* Sets the ID code speed in WPM<br></p>
<p><b>> SPD</b> <= <i>Displays the ID code speed setting<br></p>
<p><b>> STA [on|off]</b> <= <i>* Turns on/off the starting tones function</i><br></p>
<p><b>> STA</b> <= <i>Displays the starting tones setting</i><br></p>
<p><b>> SYN [on|off]</b> <= <i>* Turns on/off synchronization using sync button or "GO" command</i><br></p>
<p><b>> SYN</b> <= <i>Displays the synchronization setting</i><br></p>
<p><b>> TEM</b> <= <i>Displays the processor's temperature in C</i><br></p>
<p><b>> VER</b> <= <i>Displays the software version number</i><br></p></pre>
<p>* These values get stored to EEPROM and are retained between power cycles. </p>
<h3>Pinout<h3>
<pre><p><b>PB1 - Pin 9 (Output)</b> <= Audio Out GND=No-tone
<pre><p><b>PB5 - Pin 13 (Output)</b> <= LED On=+V
<pre><p><b>PD2 - Pin 2 (Output)</b> <= Key/PTT On=+V
<pre><p><b>PD3 - Pin 3 (Input)</b> <= Synchronize
<pre><p><b>PD4 - Pin 4 (Input)</b> <= DIP Switch Bit 0
<pre><p><b>PD5 - Pin 5 (Input)</b> <= DIP Switch Bit 1
<pre><p><b>PD6 - Pin 6 (Input)</b> <= DIP Switch Bit 2
</pre>
<pre><p><b>PB1 - Pin 9 (Output)</b> <= Audio Out GND=No-tone</p>
<p><b>PB5 - Pin 13 (Output)</b> <= LED On=+V</p>
<p><b>PD2 - Pin 2 (Output)</b> <= Key/PTT On=+V</p>
<p><b>PD3 - Pin 3 (Input)</b> <= Synchronize</p>
<p><b>PD4 - Pin 4 (Input)</b> <= DIP Switch Bit 0</p>
<p><b>PD5 - Pin 5 (Input)</b> <= DIP Switch Bit 1</p>
<p><b>PD6 - Pin 6 (Input)</b> <= DIP Switch Bit 2</p></pre>
<p>A schematic design, a bill of materials, and a source for ordering a printed circuit board will be made available soon.</p>