Windows 10 can't connect to CONTROL+ hub

[DanieleBenedettelli]

Describe the bug
I tried connecting to a CONTROL+ hub with
code.pybricks.com and beta.pybricks.com
from Chrome Versione 94.0.4606.81
on Windows 10 20H2 19042.1288
The hub had the fw installed using Android, because on this machine the fw upload failed.

To reproduce
Click on connect, select hub, wait

Expected behavior
The computer won't connect to the hub. On the Console, this error appears
DOMException: GATT Server is disconnected. Cannot retrieve services. (Re)connect first with device.gatt.connect

Screenshots
Here are the logs from code and beta
beta.pybricks.com-1634757617600.log
code.pybricks.com-1634757458917.log

[dlech]

This sounds like #312. Can you try capturing Bluetooth packets to see if we see the same thing?

Instructions: https://bleak.readthedocs.io/en/latest/troubleshooting.html#windows-10

[DanieleBenedettelli]

Here are two logs taken as indicated here
https://bleak.readthedocs.io/en/latest/troubleshooting.html#windows-10
I started WireShark and then tried to connect using beta,pybricks.com
win10-controlhub2.zip

[dlech]

Thanks for taking the time to do this. These Bluetooth issues that only happen on certain computers are a pain. This seems like a bug in Windows rather than Pybricks, but it would be nice if we could figure out some sort of workaround.

I've attached a log from my working setup to see if anyone can spot any differences. The only thing I have seen so far is that in #312 (comment) and win10-controlbhu2.pcapng, there is a delay of a few seconds before "Rcvd Read Remote Version Information Complete" shortly before the device is disconnected.

win11-technichub-pybricks-code-beta-working.zip

[dlech]

I found another Chromium bug that could be related https://crbug.com/1120338. Try starting Chrome with --enable-features=NewBLEGattSessionHandling on the command line to see if it makes a difference.

[DanieleBenedettelli]

I tried and nothing changed. I can connect on my Android phone after some attempts, but developing with it is problematic. D Il giorno mer 20 ott 2021 alle ore 22:56 David Lechner < ***@***.***> ha scritto:

…

I found another Chromium bug that could be related https://crbug.com/1120338. Try starting Chrome with --enable-features=NewBLEGattSessionHandling on the command line to see if it makes a difference. — You are receiving this because you authored the thread. Reply to this email directly, view it on GitHub <#513 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ALJJ3TODAOTW6TATYIW6BT3UH4UIZANCNFSM5GMM3KJQ> . Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub>.

[DanieleBenedettelli]

@dlech I am trying flashing the firmware from an Android smartphone, it's the 3rd attempt, and when it arrives at 100%, it gives the error "The hub took too long to respond. Restart the hub and try again."

The hub remains in bootloader mode when I power cycle it, and I have to use the LEGO Powered Up app to flash the original fw back. I really need the Technic hub for a commission.
Two out of two devices won't flash it. Can it depend from the hub itself?

[DanieleBenedettelli]

Can I use the BlueGiga BLED112 as dongle alternative to my PC embedded antenna?

Thanks,
D

[dlech]

I am trying flashing the firmware from an Android smartphone,

Are you using https://beta.pybricks.com? There is a known issue with android on https://code.pybricks.com.

[dlech]

Can I use the BlueGiga BLED112 as dongle alternative to my PC embedded antenna?

If it has a Windows driver, it could work (you will need to disable the built-in Bluetooth device in Device Manager). I don't know if the problem you are having is with the computer or with the Bluetooth chip.

[DanieleBenedettelli]

Shoot, I forget using beta! Let me try again from my 3rd device, and Android tablet.

[DanieleBenedettelli]

Fw update succeeded from LENOVO tablet with beta. My PC cannot even connect when the fw is PyBricks to develop code.
I will try using Android

[dlech]

Did you ever find a compatible adapter?

[DanieleBenedettelli]

Yes, I bought the TP-LINK Bluetooth Adapter 5.0 UB 500
https://amzn.to/3TFxC6A which works wonderfully!
When I need to work with PyBricks, I disable the internal antenna, and I plug the external dongle.

[dlech]

Awesome! Out of curiosity, what kind is the internal radio that doesn't work?

[DanieleBenedettelli]

My DELL laptop has a Dell Wireless 1820A Bluetooth 4.1 LE adapter (Broadcom Corporation)