Like automated cars and planes today, there is still a human at the wheel - this device is no different. And so, the iLet must be designed for that person - not the industry it comes from.
While this device is intended to automate as much of the work as possible, it is limited by the speed of insulin and glucagon and the unexpected and fallible nature of the human. The negotiation and collaboration between the algorithm and the person using it is critical.
We interviewed 15 people who had been in clinical trials with the previous version of the device with various stimuli and probes. We inquired about general topics and specific interactions.
We built a web app to prototype the first version of the interface. We used a Yota Phone to test the contrast and the interaction with an eInk screen.