DTM Script Python COM Ports

[Dominik]

Hello,

i have a Problem with the COM ports of Windows starting the example.py from the nAN34_v1.01 application. I have configured the COM Ports in the example.py in the Editor.

I always got the same message when starting the script : 

Transmitter test Connect Serialport error could not open port 'COM2': WindowsError(5, 'Zugriff verweigert')

Any Idea?

Best regards

[Jørgen Holmefjord]

Hi,

It looks like you do not have access to the COM port. It is not used by any other aplications?

Which Python and PySerial versions are you using? From the README.txt file:

1. Requirements
---------------
The DTM library is written in Python. It is tested with Python 2.7.2 with pySerial 2.6. It should be working with any Python 2 version from 2.7.

Python may be downloaded from http://www.python.org/getit/
pySerial may be downloaded from https://pypi.python.org/pypi/pyserial

Have you tried running the command line as administrator and then running the Python example from this?

Best regards,
Jørgen

[Jørgen Holmefjord]

Yes, sounds like that should work. Did you try to run as administrator?

[Dominik]

Yes I tried it. I have two different machines. Maybe its the usb to Serial converter?

[Jørgen Holmefjord]

Which USB to serial converter are you using? Have you tested with a nRF5x DK? I have only tested the example code with a DK.

[Dominik]

Okay I have tested it with two nRF 52 DK boards over USB ( JLink CDC UART Port) yesterday. It seems to be working fine. But I want to connect my DUT with a Serial to USB Adapter. 

[Dominik]

I have solved the Problem. Problem was the wrong Baudrate in the SDK file. 

[Spirit]

Dominik

Hi Dominik!
I have the same problem.
What exactly did you do to solve it?
All the baudrates - in the Nordics python script, in the SDK file and also in the FTDI drivers - are set to 19200.
So why it is not working as it should?

I'm using a custom board + a FT230X USB adapter.
(Python Version 2.7.15 and Pyserial 3.4)

@Jørgen Holmefjord
Yes, I tried also to run a comand prompt as administrator, but without success.

[amattmiller]

Any luck Spirit? I'm running into the same thing with same parameters as you.

[Dominik]

I think the best way to try it out first, is to check it out with two nRF 52 Development Kits. That worked fine for me. Than i switched to my HW. What i now do is to use Softwaretool in nRF Go Studio, i think its the same Plattform but you have a nice graphical interface. I hope you can get forward with this..

[amattmiller]

Dominik,

Thank for responding!

I think my issue either came down to the driver installation or somehow I introduced a bug into Nordic's python scripts.

I was using this cable:

https://www.digikey.com/product-detail/en/ftdi/C232HD-DDHSP-0/768-1011-ND/2767783&?gclid=Cj0KCQjwjMfoBRDDARIsAMUjNZpwjqR2HFZr8jRJ4Sztp1nECAqOAa1fJlhoYMaU7ThPAHf7jlIk2VkaAjnfEALw_wcB

There are multiple drivers that you can choose from when installing the device. In the end what worked for me was to install the VCP (virtual com port) driver, In there you have two choices, bus or port and I chose port.

https://www.ftdichip.com/Drivers/VCP.htm

I am using a Windows10 surface pro, python 2.7, and pyserial 3.4.

--Aaron