Traceback (most recent call last):
  File "/usr/local/lib/python3.7/dist-packages/serial/serialposix.py", line 322, in open
    self.fd = os.open(self.portstr, os.O_RDWR | os.O_NOCTTY | os.O_NONBLOCK)
FileNotFoundError: [Errno 2] No such file or directory: '/dev/ttyS2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "Elelabs_EzspFwUtility.py", line 82, in open
    timeout=3)
  File "/usr/local/lib/python3.7/dist-packages/serial/serialutil.py", line 244, in __init__
    self.open()
  File "/usr/local/lib/python3.7/dist-packages/serial/serialposix.py", line 325, in open
    raise SerialException(msg.errno, "could not open port {}: {}".format(self._port, msg))
serial.serialutil.SerialException: [Errno 2] could not open port /dev/ttyS2: [Errno 2] No such file or directory: '/dev/ttyS2'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "Elelabs_EzspFwUtility.py", line 804, in 
    elelabs.flash(args.file)
  File "Elelabs_EzspFwUtility.py", line 689, in flash
    if self.restart("btl"):
  File "Elelabs_EzspFwUtility.py", line 607, in restart
    adapter_status, adapter_name = self.probe()
  File "Elelabs_EzspFwUtility.py", line 532, in probe
    serialInterface.open()
  File "Elelabs_EzspFwUtility.py", line 84, in open
    raise Exception("PORT ERROR: %s" % str(e))
Exception: PORT ERROR: [Errno 2] could not open port /dev/ttyS2: [Errno 2] No such file or directory: '/dev/ttyS2'