Physical Computing
For tasks like controlling motors or reading sensors, use a microcontroller.
Microcontrollers
Arduino/Firmata
Nodes for communicating with Arduinos (or other microcontrollers) running the Firmata Protocol are shipping with vvvv. Reference the VL.IO.Firmata package via the Node Browser and see its helppatches in the Help Browser.
Phidgets
For using Phidgets: Products for USB Sensing and Control
NuGet: VL.Devices.Phidgets
nanoFramework
Want to use plain C# to write code for your microcontrollers? Try the nanoFramework which allows you to write C# with a reduced set of .NET libraries that run on hardware like ESPs and more.
Meadow
Want to use full C#/.NET on a microcontroller? Try Meadow.