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* Allow selecting which encoding to use for decoding text commands.Diego Elio Pettenò2021-03-031-11/+9
| | | | | | | | The FreeStyle Libre at least allows patient names and other strings to be set in UTF-8 so there is no reason to force ascii everywhere. Instead, allow the session to define an encoding for ease of integration with downstream tools.
* Calculate multirecords checksum based on the raw bytes.Diego Elio Pettenò2021-03-031-7/+14
| | | | | | | | | | | | | | | | | The original FreeStyle Libre software is known for incorrectly truncating strings with UTF-8, which causes the multi-record strings not to decode correctly. But since the Libre actually sends these as they are provided, we can calculate the checksum correctly if we do that _before_ replacing the invalid codepoints. This splits the `send_text_command` method into a public and a private interface, with the public returning the expected string, while the private returns the raw bytes. It should probably be changed to always return bytes instead. This change fixes https://github.com/glucometers-tech/glucometerutils/issues/103.
* Initial import of freestyle-hid.freestyle-hid-1.0.0Diego Elio Pettenò2020-10-041-0/+264
This library is a factor-out of https://github.com/glucometers-tech/glucometerutils to only include the FreeStyle implementation, to make it easier to use outside of glucometerutils, and in particular to make it easier to build better reverse engineering tooling around it. Note that since the code was a mix of MIT and Apache-2.0 license, the overall license of the library is written down as Apache-2.0, as that would be a super-set of the requirements from MIT.