Update README.md

README.md

@@ -8,9 +8,10 @@
 <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>
   
-  <p>	CAL <num><br>
-  FAC<br>
-  DIP<br>
+<p>	 CAL [num] <it>*Sets the clock calibration for precise timing</it><br>
+<p>  CAL <it>Displays the clock calibration setting</it><br>
+<p>  FAC <it>Sets saved EEPROM values to their original defaults</it><br>
+<p>  DIP<br>
   LED<br>
   SYN<br>
   TEM<br>
@@ -21,6 +22,8 @@
   STA<br>
   VER<br>
   <p/>
+  
+  <p>* These values get stored to EEPROM and are retained between power cycles. </p>
 
 <p>A schematic design, a bill of materials, and a source for ordering a printed circuit board will be made available soon.</p>