> On Mar 9, 2015, at 7:36 AM, Jef Driesen <[email protected]> wrote: > > On 2015-03-09 14:12, Lubomir I. Ivanov wrote: >> i'm not very familiar with this GSoC idea and bluetooth in general. >> "Subsurface and the underlying libdivecomputer today use the rfcomm >> emulation to communicate with Bluetooth enabled dive computers. We >> should use native Bluetooth instead" >> https://msdn.microsoft.com/en-us/library/windows/desktop/aa362932(v=vs.85).aspx >> you probably know that BTLE support is Win8 or newer, BT2.1 is since >> Vista SP2, while we need to support Windows XP (SP1 first introduced >> BT) in Subsurface which has to be done with things like the WinSock / >> RFCOMM API, i'd say. >> hmm, so i wonder what is "native Bluetooth support", does that imply >> writing a device driver for Windows that is installed by Subsurface. >> for instance i don't think that BNEP and L2CAP are accessible from user >> space... > > On the libdivecomputer side, "native bluetooth support" means using the > operating system' native bluetooth api instead of relying on the serial > emulation. My main motivation behind that (besides the improved > user-experience of no longer having to setup the virtual serial ports) is > that the serial emulation isn't always working very well. I have received > several reports (including from personal experience) where downloading always > fails for unknown reasons. Those problems disappear completely when switching > to native bluetooth communication. I suspect this might be a driver problem, > but I don't know for sure. > > Linux and Windows provide a socket based api, which is exactly what I used in > my prototype. Right now we only need SPP/RFCOMM (Serial Port Profile). That's > what the bluetooth enabled dive computers (Shearwater Petrel, Heinrichs > Weikamp OSTC Sport) use today. It's also the protocol used underneath the > serial emulation. > > I don't have any experience with Bluetooth Low Energy (BLE). But as far as > I'm concerned that's not a priority. Let's go step by step and take care of > "normal" bluetooth first :-)
The first dive computers with BLE are out, more are coming. I haven’t seen one, yet, that is BLE only, but I wouldn’t be surprised if those were “just around the corner”. /D _______________________________________________ subsurface mailing list [email protected] http://lists.subsurface-divelog.org/cgi-bin/mailman/listinfo/subsurface
