Traceback using a CH340 based rs485 to usb converter

[PaigeMaker]

The inexpensive ch340 based chips don't provide any vendor, product or serial number info so the get_usb_serial_port_info() function fails when using one of these rs485 to usb converters. I commented out the function call to get around the traceback, and the rest of api is working good.

Traceback (most recent call last):
  File "~/eg4_12000xp/PythonProtocolGateway/protocol_gateway.py", line 244, in <module>
    main()
  File "~/eg4_12000xp/PythonProtocolGateway/protocol_gateway.py", line 224, in main
    ppg = Protocol_Gateway(args.config)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~/eg4_12000xp/PythonProtocolGateway/protocol_gateway.py", line 147, in __init__
    transport : transport_base = cls(transport_cfg)
                                 ^^^^^^^^^^^^^^^^^^
  File "~/eg4_12000xp/PythonProtocolGateway/classes/transports/modbus_rtu.py", line 37, in __init__
    print("Serial Port : " + self.port + " = ", get_usb_serial_port_info(self.port)) #print for config convience
                                                ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "~/eg4_12000xp/PythonProtocolGateway/defs/common.py", line 51, in get_usb_serial_port_info
    return "["+hex(p.vid)+":"+hex(p.pid)+":"+str(p.serial_number)+":"+str(p.location)+"]"
               ^^^^^^^^^^
TypeError: 'NoneType' object cannot be interpreted as an integer

[HotNoob]

ty.

e411507

should fix it. not entirely certain how find_usb_serial_port would handle it, but i think it should be fine.

[PaigeMaker]

Yes, that fixed it, thanks!