For an intro, see insulaudit. We are hoping to help diabetics independently reproduce therapeutic audits of their Medtronic insulin pumps. This experimental software will download pump settings, and the entire log of historical data.

We can decode many of the opcodes that store configuration settings. We can also download all pages of history from the ReadHistoryData command, which contains the log of all actions the pump has taken on your behalf:

• glucose readings
• all bolus dosings, all usage of bolus wizard
• unabsorbed insulin
• alarms, etc...
• current settings

Talk to my test insulin pump over the internet. Requires socat and python 2.7. The script ./bin/socat_run_app.sh will connect to my server, bewest.io:8080 where my test insulin pump, serial 208850 is waiting to talk to you.

Here's an example using my scripts:

$ git checkout -b tester # create a new branch with just your stuff, please
$ . ./bin/common # import some handy run_* functions
$ ./bin/socat_run_app.sh & # get my test insulin pump from bewest.io:8080
$ ls carelink.ttyUSB0  # creates this thing
carelink.ttyUSB0
$ ./status-quo.sh ./carelink.ttyUSB0
[...]
$ PORT=./carelink.ttyUSB0 SERIAL=208850 run_download 
[...]

• download
• commands

Try figuring out the dosing commands. Is it possible to rewind the pump? Is it possible to enter new profiles and schedules?

• collect more data
• finish analyzing pages of insulin pump history
• https://github.com/bewest/decoding-carelink/tree/rewriting/analysis/pages ** analyze insulin pump bolus records ** help analyze prime events ** help analyze pump midnight events

Once we can decode historical logs, we'll clean up and merge back into insulaudit

Documentation of protocol, decoders, etc...

# fork the repo on github
# clone the repo
$ git clone git@github.com/<yourname>/decoding-carelink.git
$ cd decoding-carelink
$ git checkout -b <yourname>
$ ./insert.sh # will ask for sudo to configure usbserial for the stick
# ./status-quo.sh [[<path>|/dev/ttyUSB0>] [<serial>|208850]] eg:
$ ./status-quo.sh /dev/ttyUSB0 208850
$ git commit -avm "here is my data <yourname>"
$ git push -u origin <yourname>

Thanks! If you can include CSV export from carelink, it would be helpful.

We know how to decode time and as a result we can find and parse most records now.

And lining this up with the Carelink CSV exports reveals the nature of the contents for further analysis.

Once we can decode all records, it should be useful for diabetics, to get basic reports, more or less on par with the vendor's solution. We'll use it to collect diabetes data (https://github.com/bewest/decoding-carelink/tree/rewriting/analysis/pages) over the internet, allowing anyone to independently audit their therapy, and then send the data to their preferred auditing software.

Convert a hexdump from cl2.py into binary data. Used something like:

function new_name ( ) { echo $1 | sed -e "s/hex/binary/g" | sed -e "s/log/data/g"; }

bewest:~/src/decoding-carelink/new-years-day/rollover-month/stage-5$ for x in hex-*; do ../../../hexlog2binary.sh  $x $(new_name $x); done

List records found in binary data by looking for opcodes, and a regular data structure associated with that length. Includes at least one variable stop length strength.

List records found in binary data by looking for dates.

Download data from an insulin pump. cl2.py src Working on a simpler version...

Covers about a dozen opcodes, including downloading multiple "pages" of historical data from a pump.

Run a binary file through a rudimentary scapy model.

# usblyzer_filter.sh was used to filter the raw usblyzer csv export into
# something a bit more manageable.
$ history
  553  ./usblyzer_filter.sh  first_run.csv  
  554  ls
  555  git mv first_run.csv pcaps/first_run/
  556  ./usblyzer_filter.sh  pcaps/first_run/first_run.csv  
  557  ./usblyzer_filter.sh  pcaps/first_run/first_run.csv   > pcaps/first_run/pcap.csv
  558  git mv second_run.csv pcaps/second_run/
  559  ./usblyzer_filter.sh pcaps/second_run/second_run.csv 
  560  ./usblyzer_filter.sh pcaps/second_run/second_run.csv  > pcaps/second_run/pcap.csv
  561  git mv third_run.csv pcaps/third_run/
  562  ./usblyzer_filter.sh  pcaps/third_run/third_run.csv 
  563  ./usblyzer_filter.sh  pcaps/third_run/third_run.csv  > pcaps/third_run/pcap.csv
bewest@paragon:~/src/decoding-carelink$ 

Thanks, -contributors