   }
 }
 
-void sendByteOnPin(int command) {
+inline void sendByteOnPin(int command) {
     // This will actually send 10 bytes,
     // starting with a zero (always)
     // and then the next nine bytes

    q.enqueue(0b000001010);
    sendBytes();

    //delay(LETTER_DELAY); // before next character
}

void send_return(int numChars) {

  //PORTD |= 0b00000100;

  pinMode(d2, INPUT); // listening pin
  // PORTD |= 0b01000000; // the listening pin is mapped to bit 6

  // start the input pin off (meaning the bus is high, normal state)
  PORTD &= 0b11111011;
