[ejj28]

They're using it to receive data from the continuous glucose monitor and to run Android APS, which is an open source closed loop 'artificial pancreas' system. Some pumps (like the Tandem T:slim X2) will receive data directly from the CGM, so you technically don't need a phone in that case - but a phone is still useful as it can constantly share blood glucose data with other people (in this case, probably the parents).

[beeflet]

Seems like they ought to use a lower-level system. I hate to see the day when someone's smartphone-based pacemaker or whatever crashes or gets hacked and kills the person attached.

You could have a low power system like ESP32 or STM32 act as the artificial pancreas and transmit data to a smartphone over BT

[grahar64]

The only blocker for a lot of these things to exist is just someone to make it. There is no money in it, the software is life and death sometimes, the total amount of users you can reach is world wide is probably like 2-3 million. The only stopper is just someone making it.

[lazyasciiart]

seems like you ought to build it.

[LeafItAlone]

>Android APS, which is an open source closed loop 'artificial pancreas' system

Ah, that’s what I was missing. It’s not one official product from a manufacturer, it’s a “hack” solution. Thank you.