Open loop if the diff between 2 consecutive values is >50mg/dl

[Andrei0105]

Did multiple tests with a lower threshold on live data from Spike + MM.
Also with fake values from Spike in follower mode.
Everything is working as expected, the app switches to open loop is there is a jump higher than 50mg/dl between 2 consecutive values.

[adamd9]

Hey @Andrei0105 ! Thank you so much for your work on these branches - I'm basically loving them, except that I found that often I'd check on loop after a couple of hours and find it open - I've just stumbled across this commit as the likely cause (it was an ageing sensor so occasionally would have those BG jumps). I guess it's more critical to be working of accurate results with AB on but at the same time silently moving to open loop can be dangerous in itself. Can I suggest a couple of ideas that might enhance this improvement?
-Post an alert/notification to the phone from the spike app when it drops out of loop, similar to the low reservoir / low battery warnings
-Enhance the math to also check if it was just a blip. I.e next reading if the loop is still open due to a big jump, check if the latest reading is within the tolerance (50mg/dl?) of the reading 2 values ago and re-close the loop if it is?

Keep up the great work!