Traceback (most recent call last):
  File "/home/pi/Airbeam2/data_logger.py", line 19, in <module>
    timeout=1
  File "/usr/lib/python2.7/dist-packages/serial/serialutil.py", line 236, in __init__
    self.open()
  File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 268, in open
    raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyACM1: [Errno 2] No such file or directory: '/dev/ttyACM1'