Failed to set BLE scan parameters: Input/output error (5)

[tmichels]

Hello Dan,

Since TomTom stopped support, I am using the USB tool from https://github.com/scubajorgen/TomTomWatch. And I wanted to try out your app, it looks very promising as it may provide the more user friendly bluetooth functionality (and my USB connection is not that stable anymore).

When I follow your instructions, I encounter the following error. Did something get broken over time maybe? Or is the app still working for you and is something wrong on my system configuration?

user@ubuntu:~/ttblue$ ./ttblue -a -d E4:04:39:77:A8:46 
****************************************************************
Please put device in pairing mode (MENU -> PHONE -> PAIR NEW)...
****************************************************************
Press Enter to continue: 

Scanning for TomTom BLE device E4:04:39:77:A8:46...
Failed to set BLE scan parameters: Input/output error (5)
BLE scan failed: Input/output error (5)
Fatal error, exiting.

Thanks for doing all this work already, I really hope I will be able to use it in the end!

Best regards,
Thomas

[dlenski]

Have you tried running it as root? Might be best to try to figure out how to run it that way, and then get the permissions adjusted later.

Unfortunately I no longer have a TomTom device myself, so I have difficulty testing/debugging.

[tmichels]

Hi Dan,

Thanks for your reply. But permissions do not seem to be the issue: I tried with both compiling and running as root, but still get the same message. Attached the output of the compilation and the full overview on what I tried.
attempt.txt

The error message comes up immediately after hitting enter, suggesting that it never even starts scanning for the device's signal. So this could be tested without watch as well.

Do you remember on which OS you ran this last time successfully? I could try to install that and see if it solves the problem. I am running Ubuntu 23.10 myself, maybe it has not all required packages installed (although I did install the ones suggested by you of course), or maybe it has different bluetooth mechanism / security settings than your OS.

Thanks again!

Best regards,
Thomas