 
 //respond to serial commands
 void respondToByte(char c) {
-  myTympan.print("Received character "); myTympan.println(c);
+  Serial.print("Received character "); Serial.println(c);
   
   switch (c) {
     case 'J': case 'j':

  TR_Card *card_h;  //dummy handle for a card

  //Add first page to GUI
  page_h = myGUI.addPage("MyFirstPage");
      //Add a card under the first page
      card_h = page_h->addCard("Change Loudness");
          //Add a "-" digital gain button with the Label("-"); Command("K"); Internal ID ("minusButton"); and width (4)


//Print gain levels 
void printGainLevels(void) {
  Serial.print("Analog Input Gain (dB) = "); 
  Serial.println(input_gain_dB); //print text to Serial port for debugging
  Serial.print("Digital Gain (dB) = "); 
  Serial.println(digital_gain_dB); //print text to Serial port for debugging
}

void setButtonText(String btnId, String text) {
  String str = "TEXT=BTN:" + btnId + ":"+text;
  Serial.println(str);
  ble.sendMessage(str);
}
