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The BLE (and USBHID) protocol stores the size of the payload as a single byte in the packet header. Hence the size of the payload is limited to a maximum of 255 bytes. For sending packets, there is an additional command byte present, which reduces the maximum payload size to 254 bytes. For receiving packets, there is no command byte present and thus the maximum payload size is 255 bytes. The Scubapro G3 sends BLE packets of 256 bytes, and that caused the download to fail because the receive buffer was one byte too small.
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.