code: public void sendTriState(String codeWord) {
          if (transmitterPin != null) {
              for (int nRepeat = 0; nRepeat < repeatTransmit; nRepeat++) {
                  for (int i = 0; i < codeWord.length(); ++i) {
                      switch (codeWord.charAt(i)) {
                          case '0':
                              this.sendT0();
                              break;
                          case 'F':
                              this.sendTF();
                              break;
                          case '1':
                              this.sendT1();
                              break;
                      }
                  }
                  this.sendSync();
              }
              transmitterPin.low();
          }
      }
docs: Sends a Code Word
  
  @param codeWord /^[10FS]*$/ -> see getCodeWord