   lastAOA = AOA;
 #ifdef SHOW_SERIAL_DEBUG    
   // show serial debug info.
-  sprintf(tempBuf, "AOA:%i Live:%i ASI:%ikts ALT:%i PPS:%f cycleCounterResetAt: %i",AOA, liveAOA, ASI, ALT, pps, cycleCounterResetAt);
+  sprintf(tempBuf, "TONE AOA:%i Live:%i ASI:%ikts ALT:%i PPS:%f cycleCounterResetAt: %i",AOA, liveAOA, ASI, ALT, pps, cycleCounterResetAt);
   Serial.println(tempBuf);
 #endif
 }

  #define LOW_TONE_PPS_MIN      1.5
  #define LOW_TONE_HZ           400     // freq of low tone
  #define BAUDRATE_EFIS         115200  // default baud rate for D100/D10
#else
  // AOA values & Tone Pulse Per Sec (PPS)
  // DEFAULT SETTINGS.
  #define HIGH_TONE_STALL_PPS   20      // how many PPS to play during stall
  #define HIGH_TONE_AOA_STALL   90      // % (and above) where stall happens.
  #define HIGH_TONE_AOA_START   70      // % (and above) where high tone starts
  #define HIGH_TONE_PPS_MAX     6.5     // 6.5   
  #define HIGH_TONE_PPS_MIN     1.5     // 1.5
  #define HIGH_TONE_HZ          1600    // freq of high tone
  //#define HIGH_TONE2_HZ         1500    // a 2nd high tone that it will cycle between (if defined)
  #define LOW_TONE_AOA_SOLID    60      // % (and above) where a solid low tone is played.
  #define LOW_TONE_AOA_START    20      // % (and above) where low 
  #define LOW_TONE_PPS_MAX      8.5
  #define LOW_TONE_PPS_MIN      1.5
  #define LOW_TONE_HZ           400     // freq of low tone
  #define BAUDRATE_EFIS         115200
#endif
#endif

#define TONE_PIN              2     // TIOA0
#define PIN_LED1              13    // internal LED for showing AOA status.

          tempBuf[4] = '\0'; //
          ALT = (strtol(tempBuf, NULL, 10) * 0.328) * 10; //convert to long (and from meters to feet)
          validAOADataFound();

#ifdef SHOW_SERIAL_DEBUG    
          Serial.print("D100 AOA ");
          Serial.println(AOA);
#endif
        } else if(inChar == '\n') {
          // if we are at the end of line then reset postion to start looking for a new line.
          inputPos = 0; 
