Thanks for the quick reply, I tried it in BLE mode. After same connection issue I get the same error (see log file).
subsurface_log2.log
Description: Binary data
> Am 11.01.2021 um 20:49 schrieb Linus Torvalds <[email protected]>: > > On Mon, Jan 11, 2021 at 11:37 AM Markus Hinkelmann via subsurface > <[email protected]> wrote: >> >> I tried to import my dives from my Mares Quad Air using the Interface „Mares >> BLUELINK Pro“ to subsurface. > > I'm afraid that the Mares BlueLink Pro has been the most problematic > piece of BLE hardware we have ever seen. > > It has been known to work - often very very slowly - but it has always > been extremely flaky. I've never figured out why. > >> The computer was able to connect to the interface using the mode >> „BT-classic“ but the import fails. > > I didn't even know that it supported BT-classic at all. I've only ever > seen it do BLE. > > I was going to say that BT-classic cannot possibly work, but: > >> A dump file was not created, but I was able to create a libdivecomputer log >> file (see attachment). > > Strangely, it actually partially does seem to have worked. There are a > few valid reply packets with the valid '0xAA' packet reply byte, and > the communication actually starts. Color me I'm surprised. > > So that log shows us sending several commands to it, and starting to > do a data transfer. Yeah, we get a few NAK packets (0xEA) back > instead of 0xAA, and a couple of "no reply at all" cases, but even > then the re-try ends up working a few times. > > But then at some point, even when retrying, it just returns an > all-ones (0xff) answer, and after five failres for that command we > just give up. > > Honestly, this _might_ be one of those cases where "if you try again, > eventually it might work". > > But equally honestly, I've pretty much given up on the Mares BlueLink > adapter. I don't know why it's so flaky. The Mares mobile app seems to > be able to talk to it, but when I did a packet trace, I didn't see it > do anything special, so I don't know what is going on. It might be > some very subtle timing issue that the Mares app is aware of. > > Linus
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