cominixo/openlibrenfc

An app to modify and read memory in the Libre blood glucose monitor.

OpenLibreNFC

Disclaimer

Do not use sensors modified with this app to make medical decisions. I am not responsible to any damage to the sensor that might occur, use this at your own risk. This app is only intended for research.

This app only works with non-US Libre 1 Sensors, if you have a US Libre 1 sensor this app will not work with it.

Installation

Apks are available on the Release tab here on GitHub.

You can also build the app yourself:

This guide from the AndroidAPS docs explains how to build an apk, the steps should be basically the same, just using this repository instead.

You'll need the Android SDK installed and define the ANDROID_SDK_ROOT environment variable, after that, you can run gradlew to build the .apk file (it should probably be signed so you can install it).

You can also install Android Studio and build it from there.

Usage

When you open the app, you can select different options (Scan, Reset Age, Start...) and then scan the sensor, which will execute whatever you selected. When you scan the sensor to perform any action, you should wait for the second vibration to stop scanning. This might take a bit longer with operations which involve writing into memory.

The "Dump Memory" option will dump 360 bytes of the sensor's FRAM to sdcard/openlibrenfc/memory_dump.txt, and the "Load Memory" will load that same file. If you edit that file, the checksums won't be checked, and it might send the sensor into failure if a checksum is incorrect. Make sure you have backups of previous memory dumps so you can restore it in case anything happens.

openlibrenfc's Issues

Need more info about System requirements..

Support for libre sense sport glucose sensor

Hi great app,.

Would it be possible to support the libre sense sport glucose sensor as well ?

Force close.

I was trying to test it but app forces close.

• Android 10 rooted (PixelExperience ROM)
• Redmi Note 7 (don`t have NFC)

Here's logcat:
https://pastebin.com/Er3xzEN7

Couldn't dump memory

When i press "dump memory" button an error message "Couldn't dump memory " is shown
Log:
https://pastebin.com/nxLd3FMG
I have tried to create the directory and the file manually but the same error is still there.

How to use the dump

Thanks for making this app.

I got it running. I did a scan and got a dump file. How do you suggest to use the file?
I tried to convert the bytes to decimal values, but the numbers doesn't make sense to me. I guess there is a way to convert the raw data to glucose values.

Help! How do I use it?

I downloaded the app, but it doesn't seem to be working... I pressed scan, start and all but it does not show any responses besides the phrase "Selected Action: Scan". I tried to find some prints of the app to know what it should look like, but no luck. Can anyone help me?

Scan action just does one beep ?

Hi,

Cool app idea!
Scanning (did'nt try the others so far) just does one "beep" .. no further response or display on the screen ...
Is it supposed to work with the Libre 2 Sensor / Germany I use ?

Many Thanks

First use in Brazil

Hi, Thanks for the app. Really appreciate!

i am trying to use the app in brazil but im not pretty sure where the brazilian sensor is from. After a first scan, it shows the sensor is in region 8. is it a region ok? should the app works here?
also, for the scanning, should i use your app or the ordinary freestyle libre? it didnt show any result when i tried yours. Only a notification saying that it was successfuly scanned.

thanks for your attention!

Miaomiao support

It would be really good feature as many don't have smartphone with NFC reader.

Thanks.

Reset age works once

Any ideas why reset age would only work once ? After a few days after reset , it turns to error 6.
I checked and the sensor battery is still good .

GREAT tool!

Many thanks! This is a great tool - it can extend the time of the sensor.. However after about 20 days, it seems to die and not work anymore.. any ideas how we can re-start it at that point?