Read-out of a Glucose sensor (FreeStyle Libre)

Using Arduino Project Guidance
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Hi! @mbobinger,

I hope you're doing well. I came across a forum thread discussing a project related to connecting to the Freestyle Libre sensor, but the thread is closed and inconclusive. I am currently working on almost the same thing, I want arduino to comunicate with the Freestyle Libre sensor, I have an arduino nano, the MFRC522 NFC reader and a Freestyle Libre 1 sensor, I was wondering if you might be able to provide some guidance.

Was it possible to establish a connection with the Freestyle Libre sensor? I'm trying to explore the possibilities and understand what my alternatives might be in this project.

Thank you in advance for considering my request.

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The sensor talks to its application (on your phone) using bluetooth (or wifi). You might be able to trap the data if you install on your computer (not phone) WireShark ( https://www.wireshark.org/ ) and find how the two are communicating. If you find that, and the data transmitted by the sensor to your phone is "open" (non-encrypted), you can trap the data being passed and store it to your computer... unless you want to write a protocol analyzer for the Arduino (if so, I approve).

[edit] The web site says:

"... WiFi or cellular...[network]" for connection to the app.

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Thank you for your response. Actually, the first release of the FreeStyle Libre Sensor communicates using an RFID protocol, which only allows for short-distance data transfer. So, I can't capture the data as you describe. I have set up my Arduino with an RFID reader, the MFRC522. I found that @mbobinger tried to do something similar in this post: Read-out of 13.56MHz Glucose sensor (freestyle libre 2) for a university project, but unfortunately the post is closed and I don't know if he found the solution or not

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Search the web for "freestyle libre hacking reverse engineering". Many people have been down this path.

1 Like
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Send a message to mbobinger. Click the name, click their icon, click "message" and send your request.

My results: Not a single device, code, method or instruction. Just legal warnings and speculation.

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It seems they haven't posted for over 2 years - so don't hold your breath ...

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Thanks, that helped a lot, I found various github pages of related work i think the most useful is this repository GitHub - captainbeeheart/openfreestyle: Abbott FreeStyle Libre 14 days glucose sensor reverse and open software framework project, I will tried to read the data from the sensor as shows in the repository and then I think maybe I can make it work with the arduino.

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I tried to send him a direct message but I cant find the way to do it in the arduino Forum, thats why I started this post with the hope that he will answer but I think now I have more ideas to keep trying. Thanks for all your answers and if you have more info about this topic that you can share with me I really would appreciate it

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Post #5.

Perhaps your new-to-the-forum status, you might not yet have been granted "message" status. Keep reading, searching, posting. That earns you points toward status levels.

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