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pazaan / 600SeriesAndroidUploader

Your Medtronic 600-series pump data, direct to Nightscout
http://pazaan.github.io/600SeriesAndroidUploader/
MIT License
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What frequency does the Contour Next Link Meter work on and is it possible to use just a phone to communicate with the pump cgm #170

Closed Rytiggy closed 6 years ago

Rytiggy commented 6 years ago

Im curious if you knew how the pump communicates with the Contour next link meter and if a phone can produce the same connection type as the next link meter?

pazaan commented 6 years ago

The pump communicates with the CNL using IEEE 802.15.4 over 2.4GHz. The phone on its own can't do this. We also don't yet know the Over the Air encryption mechanism used. Once we figure that out, we could make something like a RileyLink2.4

wright-david commented 6 years ago

Hi

Unfortunately I can't locate the post/comment, but I'm pretty sure Jesus posted a few months back that he had broken the OTA encryption

BRs

David

From: Lennart Goedhart notifications@github.com Sent: 09 January 2018 06:07:45 To: pazaan/600SeriesAndroidUploader Cc: Subscribed Subject: Re: [pazaan/600SeriesAndroidUploader] What frequency does the Contour Next Link Meter work on and is it possible to use just a phone to communicate with the pump cgm (#170)

The pump communicates with the CNL using IEEE 802.15.4 over 2.4GHz. The phone on its own can't do this. We also don't yet know the Over the Air encryption mechanism used. Once we figure that out, we could make something like a RileyLink2.4

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HenrikHL commented 6 years ago

I am pritty sure I also saw a post a couple of months ago regarding breaking the OTA encryption... Also cannot find it - have just been looking...

pazaan commented 6 years ago

Yep, it has been cracked by Jesus, but that hasn't been shared with the community, and doesn't seem likely to be. So for the purposes of getting the code to work in Nightscout, I'm going to call it "uncracked" ;)