[eatyourpeas]

This is all well and good but there are significant safety issues here. Insulin will kill you if you get the dose wrong. Or more worryingly, won't kill you but will kill your child. As a children's diabetes doctor I know this more than most. This article suggests that the only people interested in fixing the closed loop are a bunch of amateur parents - there are large studies going on in several centres across the world looking at exactly this issue - the algorithms to match insulin to glucose are not straight forward: insulin absorbs slowly, with peak action at 2 hours, gone by 4 hours. In children absorption is less predictable - I have a baby on my ward now whose 'insulin-on-board' is 6 hours. The closed loop is the holy grail for T1 diabetes and there is a lot of time, intellect and money being thrown at it. While open source hacking from intelligent and able programmers is always welcome, experimenting on your own children is dangerous and ill-advised.