ffa9e0aa3c
For the Oceanic Pro Plus X and the Aqualung i770R, downloading over BLE
often fails because the version packet contains one or more unexpected
bytes.
For a successful download, the correct structure for the version packet
is as follows:
5A 4F4345414E4F43582031432030303032 C6
That's the start byte, the payload "OCEANOCX 1C 0002" and the checksum.
For all the failed packets, there are one or more bytes extra present
between the payload and the checksum:
5A 4F4345414E4F43582031432030303032 9F02 67
5A 4F4345414E4F43582031432030303032 3603 FF
5A 4F4345414E4F43582031432030303032 64 2A
5A 4F4345414E4F43582031432030303032 9202 5A
5A 4F4345414E4F43582031432030303032 08 CE
5A 4F4345414E4F43582031432030303032 2C01 F3
The amount of extra bytes, and their content appears to be pretty
random. The strangest part is that the checksum of the packet is
actually correct and includes those extra bytes!
As workaround, accept extra bytes in the BLE packet, verify the checksum
as usual, and finally strip the excess bytes and only pass the actual
content to the next layer. To avoid false positives, the workaround is
limited to packets with a payload and checksum, and only enabled for the
two affected models.
Overview ======== Libdivecomputer is a cross-platform and open source library for communication with dive computers from various manufacturers. The official web site is: http://www.libdivecomputer.org/ The sourceforge project page is: http://sourceforge.net/projects/libdivecomputer/ Installation ============ On UNIX-like systems (including Linux, Mac OS X, MinGW), use the autotools based build system. Run the following commands from the top directory (containing this file) to configure, build and install the library and utilities: $ ./configure $ make $ make install If you downloaded the libdivecomputer source code directly from the git source code repository, then you need to create the configure script as the first step: $ autoreconf --install To uninstall libdivecomputer again, run: $ make uninstall Support ======= Please send bug reports, feedback or questions to the mailing list: http://libdivecomputer.org/cgi-bin/mailman/listinfo/devel or contact me directly: jef@libdivecomputer.org License ======= Libdivecomputer is free software, released under the terms of the GNU Lesser General Public License (LGPL). You can find a copy of the license in the file COPYING.