Towards verified programming of embedded devices

We propose a type-driven approach to building verified safe and correct IoT applications. Today's IoT applications are plagued with bugs that can cause physical damage. This is largely because developers account for physical constraints using ad-hoc techniques. Accounting for such constrains in a more principled fashion demands reasoning about the composition of all the software and hardware components of the application. Our proposed framework takes a step in this direction by (1) using refinement types to make make physical constraints explicit and (2) imposing an event-driven programing discipline to simplify the reasoning of system-wide properties to that of an event queue. In taking this approach, our framework makes it possible for developers to build verified IoT application by making it a type error for code to violate physical constraints.