Is there a way to build with bluetooth support on a mac?

[Linus Torvalds]

On Thu, May 6, 2021 at 8:43 AM Ryan Gardner <ryebrye at gmail.com> wrote:
>
> I ran into a few issues that are entirely my fault and not the fault of subsurface - namely I couldn't figure out a way to get my IDE to launch the built subsurface app and attach to it and hit breakpoints inside of libdivecomputer  (again - totally my "not normally a c/c++ application developer" problem) - but after spinning my wheels for a while I figured I'd try to see if the dctool from libdivecomputer could be a faster path to "can I get code to communicate with this thing?"

Yeah, I have worked almost entirely from just BLE packet dumps, and
just the debug output (both the subsurface debug output and the
libdivecomputer logs).

One thing to look out for is to make sure that it all works with some
other dive computer if you have one available - just to check that
everything works.

The fact that you pair is already a good sign, but usually the pain
point is the initial connection, and sometimes it's the GATT
descriptors that aren't set up the way most other serial emulation
things are.

It's all non-standard. As you may have noticed if you've been looking
at the subsurface core/qt-ble.cpp file. We have a number of "we know
this dive computer uses this BLE GATT service UUID for rx/tx", with
default fallbacks for the common situation.

Worst case, some dive computers want to do flow control. So far we've
only seen one that does that (the magic "terminal IO" stuff for the
OSTC), but if that's the case things can get quite nasty.

You do seem to have the proper packet logs, so you're probably aware
of all this already.

               Linus