So I am noticing now that Unreal Engine’s built-in support for input devices goes beyond HID. Even ‘input device’ is a lousy way to describe what they have cooked up here. At some point past jerry-rigging a solution for sanity testing I should look into a formal wrapping of my BLE device within this ‘input device’ framework. There are so many layers … Unreal Engine feels like it has the formal organization of an operating system. Auto-generate the code to build the engine that auto-generates the code to build the project. Codeception.