Type 1 diabetes is a disease that affects more than 1.2 million Americans. I'm one of them.

It's a disease that impairs the body's ability to produce the hormone insulin, which normally comes from the pancreas. So insulin has to be injected.

Managing blood sugars can be very difficult, and patients use a pump to help mimic the activity of the pancreas. However, pumps don't automatically adjust insulin levels for diabetics. And the manual process is tedious and can be dangerous.

But a few years ago, people figured out how to hack their insulin pumps to make them automatically adjust insulin levels more precisely.