nRF-Sniffer-for-802.15.4 firmware appears with two COMs and abnormal COM

[Quay]

image1, Flash "nrf802154_sniffer_nrf52840dongle.hex" onto the nrf52840-dongle, only one dongle is inserted but the computer displays two COMs.

If flash the old "nrf802154_sniffer.hex", this problem will not occur, and only one COM will be displayed normally.

When I select the first COM (com33) in Wireshark, an image2 error will be prompted.

If select the second COM (com34), no error. But  need to wait more than 15 seconds to enter the page.

Wireshark version: 4.2.4 

I think this is not a problem with Wireshark. The problem is caused by nRF-Sniffer-for-802.15.4, how to deal with it?

[Edvin]

Hello,

When you program the nRF52840 dongle, it will change COM port, so perhaps the COM33 is not actually present, if it was the COM port that you used to program the sniffer FW. So probably, you should use COM34 in your case. You can open your computer's "device manager" to see what devices that are currently available. I guess you will not see COM33 after the dongle is programmed. 

Regarding the ~15 seconds delay, I have seen that as well. I am not sure what it really is, but I guess it is some sort of interview process, or wireshark setting up the dongle with the correct settings or something.

Does it work when those 15 seconds have passed?

Best regards,

Edvin

[Quay]

Thanks for your reply

1)  Regarding the two COM, I used multiple nRF52840 dongles and multiple computers to test, and the same problem occurred.When the nRF52840 dongle enters the bootloader, there will be another COM number. In the past, when I used the old firmware, only one COM appeared.

Now the new firmware has been updated, but it occupies two COM.

2) If one of the COMs cannot be used, but the same content is displayed, it will make people choose the wrong COM and not be in a good mood.

3) Except for waiting for ~15 seconds at the beginning, other functions are normal. Wireshark can parse the data and display it normally.

Looking forward to your reply!

[Quay]

I only programmed the nRF52840 dongle on one of the computers.There are also two COM on other computers, including the computer's "device manager"

[Edvin]

Quay said:

In the past, when I used the old firmware, only one COM appeared.

Was that using the nRF52840dongle or an nRF52840 DK? And are you talking about the sniffer then, or did you use it for something else?

Quay said:

There are also two COM on other computers, including the computer's "device manager"

What version of the nRF Sniffer for 802.15.4 are you using? If you are not sure, where did you get it from?

Best regards,

Edvin

[Quay]

URL：https://github.com/NordicSemiconductor/nRF-Sniffer-for-802.15.4.git

hex file URL：github.com/.../nrf802154_sniffer_nrf52840dongle.hex

Thanks！