The NMEA plugin also requires the Qt Serial Port plugin. After installing it, the same snippet of code works as expected.

Thanks a lot :)

I am also trying to write a minimal qml app that uses the built in GPS to retrieve current position. I am not sure if I can use Qt positioning or if I should just parse the raw output of the GPS myself, like the OP did here, and extract the position manually. It seems very dirty to do it that way, I thought there would be a nice API in QML that I could use. Anyone can point to a simple example?