Read-out of 13.56MHz Glucose sensor (freestyle libre 2) for a university project

Dear Arduino-fellows,

For an interdisciplinary university project, we would like to read out the values of the glucose sensor 'free style libre 2' from abbott and develop our own warning platform with push notifications and else:

The abbott is equipped with a 13.56MHz RFID chip from Texas (RF430).
Link to datasheet:

I've tried reading it out with a standard RFID reader, the RFID-RC522, hooked up onto an Arduino UNO:

However, I have received absolutely nothing. The RFID reader works, as tested with a MIFARE card. The glucose sensor also works and can be read out using the App Freestyle LibreLink.

What do you think could be the problem? Do I first have to send a password to the sensor to get the data?

Best and thank you!

What do you think could be the problem?

The problem is that there are many protocols that can operate as an RFID system. The one you have is not the one that the RC522 is set up for.

It may be possible to set up the chip to read the protocol you want but it is not a given.

Do some more research about exactly what protocol both hardware and software you need. Then read the data sheet for the chip in the RC522 reader and see if you can match it. If not you will have to use a chip that does read that protocol or program the Arduino to read it. This last point will require some sort of hardware attached to the Arduino which is dependant on the hardware protocol your system uses.

I have received absolutely nothing.

I am assuming that is true and you do not even get the card detected signal or the universal ID.

There are projects to get continuous information from these devices but the one I've read about straps a smartphone or smartwatch with NFC over the glucose meter. Works but expensive.

You can find more by searching for "hacking freestyle libre". Maybe someone has figured out how to do it using a cheap NFC/RFID reader.