Libre2 gen2

[Anton-1408]

Hi, do I understand correctly that the libre2 Gen2 sensor type sensor work is not finished yet? If not, can I know when the work with this sensor will be added?

[gui-dos]

The native algorithms to decrypt the NFC/BLE data were unveiled originally by the Russian FreeAPS X team: I fear that none of the current Trio/iAPS and Android’s xDrip+ guys have the capabilities and/or the interest to reverse-engineer the Gen2 native methods p1() and p2()…

Juggluco’s technique to redistribute and inject into the original LibreLink obfuscated libdataprocessing.so library is not technically feasible on iOS, even because it is statically linked into the main executable.

[Anton-1408]

and for libre 2 the application works, as I understood from the code?

[gui-dos]

Yep: I was the first one to decide to publish the full Swift code for the European models that I ported from TypeScript after it was partially unveiled by https://github.com/ivalkou/LibreTools since I discovered that the decrypting keys were stored in the partial 8KB dump of the firmware that you can get after sending the custom NFC command A1 1A.

You can spot there even the offset table of the seven trend values transmitted every minute ([0, 2, 4, 6, 7, 12, 15]) while the other ports like DiaBox's and Android's xDrip+ ones just extracted the latest value B-)

[Anton-1408]

have you tried using libre 2 with the bubble nano sensor? JohanDegraeve/xdripswift#563

[gui-dos]

No: I was just renewed my annual prescription for the Libre 3 and for the past two years I have been focusing on it but I left the support for the Bubble/MiaoMiao transmitters in the playground: the modifications would be minimal to support the Nano.

May I ask you whether you own the newer Libre 2 specific for the Russian market?

I am reading that the current workaround to scrape online the libreview.io servers doesn't work unless you change the domain into .ru: with my iPad playground it should be just a matter of a minute to test it ;-)

If you scan the newer sensor kind, DiaBLE should display "Libre 2 Gen2" as its type and a "Eastern / Rest of World" as its region. Just a first step that other apps haven’t even begun to implement. B-)

[Anton-1408]

I'm from Russia. We have a libre 2 gen 2 sensor.

[Anton-1408]

Thank you for the answers

[gui-dos]

I noticed that there is a slight variation between the PatchInfos of the recent Libre 2 sensors introduced in Russia and in Latin America:

DiaBLE/DiaBLE/Libre.swift

Lines 68 to 69 in 3932dc3

	// Libre 2+ LA: 2B 0A 3A 08
	// Libre 2 RU: 2B 0A 39 08 (Gen2)

There is just an increment in the sixth nibble from 9 to A but it could be a substantial bump since the Latin Plus models last one more day and should be certified for integration with the last generation pumps for hybrid looping with commercial solutions.

[kenkit]

No: I was just renewed my annual prescription for the Libre 3 and for the past two years I have been focusing on it but I left the support for the Bubble/MiaoMiao transmitters in the playground: the modifications would be minimal to support the Nano.

Hi, any updates on the libre 3 or 3+ it would be awesome to be able to have access to this devices ?

[gui-dos]

I’ve identified the enums and struct member definitions in the decompiled Swift executables but, unfortunately, Juggluco’s developer lacks experience in iOS reverse-engineering and nobody else appears interested in documenting the underlying protocols openly on GitHub anymore.