Traceback (most recent call last):
  File "python/read_sim.py", line 6, in <module>
    print(port.readlines());
  File "/usr/lib/python2.7/dist-packages/serial/serialposix.py", line 453, in read
    buf = os.read(self.fd, size-len(read))
OSError: [Errno 11] Resource temporarily unavailable
