i have a question about using qextserialport

[to_guliang]

I don't know exactly how to do it, since I work mainly on Windows. However it should work by just modifying your pro file. The pro file needs information on where your qextserialport headers and libs are. So you need something like LIBS += -L"path/to/your/qextserialport/so/files" -lqextserialport

Same goes for include. If the compile errors out finding the qextserialport headers, then you need to tell it where to find them (INCLUDEPATH in the pro file I think).

thanks, i will try as you said.