The Location Provider object in the new Runtime SDK does not automatically support data coming from a serial port in the form of a NMEA string. This is still a very common way for users to supply GPS data to applications, both from external antennae and integrated GPS receivers in devices. I know that ESRI recommends a library accessed from GitHub that will do this, but it is only available for Windows 8, which leaves those of us who use Windows 7 or some other OS to reinvent the wheel (again).
What I am proposing is a class for dealing with NMEA data coming off a serial port be included with the next Runtime SDK.
