code: def _sendBit(port, bit):
      
      if bit == '0':
          _setRTSDTR(port, 0, 1)
      elif bit == '1':
          _setRTSDTR(port, 1, 0)
      else:
          return
      time.sleep(bitDelay)
      _setRTSDTR(port, 1, 1)
      time.sleep(bitDelay)
docs: Send an individual bit to the FireCracker module usr RTS/DTR.