baum vario 40 no key input

[alex19EP]

Steps to reproduce:

connect vario 40 vire com or usb to com converter. select baum driver in brl configuration.
press eni button on the desplay.

Actual behavior:

nvda dont doo anything.

Expected behavior:

a gesture must be executed.

System configuration:

nvda log cat

ERROR - hwIo.IoBase._notifyReceive (18:27:46.773):
Traceback (most recent call last):
File "hwIo.pyo", line 147, in _notifyReceive
File "brailleDisplayDrivers\baum.pyo", line 162, in _onReceive
File "brailleDisplayDrivers\baum.pyo", line 177, in _handleResponse
File "brailleDisplayDrivers\baum.pyo", line 228, in init
AttributeError: 'NoneType' object has no attribute 'replace'
ERROR - hwIo.IoBase._notifyReceive (18:27:47.220):
Traceback (most recent call last):
File "hwIo.pyo", line 147, in _notifyReceive
File "brailleDisplayDrivers\baum.pyo", line 162, in _onReceive
File "brailleDisplayDrivers\baum.pyo", line 177, in _handleResponse
File "brailleDisplayDrivers\baum.pyo", line 228, in init
AttributeError: 'NoneType' object has no attribute 'replace'
ERROR - hwIo.IoBase._notifyReceive (18:27:47.368):
Traceback (most recent call last):
File "hwIo.pyo", line 147, in _notifyReceive
File "brailleDisplayDrivers\baum.pyo", line 162, in _onReceive
File "brailleDisplayDrivers\baum.pyo", line 177, in _handleResponse
File "brailleDisplayDrivers\baum.pyo", line 228, in init
AttributeError: 'NoneType' object has no attribute 'replace'
ERROR - hwIo.IoBase._notifyReceive (18:27:48.290):
Traceback (most recent call last):
File "hwIo.pyo", line 147, in _notifyReceive
File "brailleDisplayDrivers\baum.pyo", line 162, in _onReceive
File "brailleDisplayDrivers\baum.pyo", line 177, in _handleResponse
File "brailleDisplayDrivers\baum.pyo", line 228, in init
AttributeError: 'NoneType' object has no attribute 'replace'
ERROR - hwIo.IoBase._notifyReceive (18:27:48.739):
Traceback (most recent call last):
File "hwIo.pyo", line 147, in _notifyReceive
File "brailleDisplayDrivers\baum.pyo", line 162, in _onReceive
File "brailleDisplayDrivers\baum.pyo", line 177, in _handleResponse
File "brailleDisplayDrivers\baum.pyo", line 228, in init
AttributeError: 'NoneType' object has no attribute 'replace'

NVDA Installed/portable/running from source:

instaled

NVDA version:

2018.3.2

Windows version:

windos 10 1809

Name and version of other software in use when reproducing the issue:

Other information about your system:

Other questions:

Does the issue still occur after restarting your PC?

yes

Have you tried any other versions of NVDA?

yes

[LeonarddeR]

This looks like a model identifier isn't set for this display. I will take this.

[LeonarddeR]

Could you please test input with this try build?

[alex19EP]

yes that build works like a charm. thanks.
i think this fix wood be included to nvda 2018.4. however i ask you wood it be possible to provide me addon or python file with this solution.
thank you @LeonarddeR for help.