And why use a timer to call the reading?
It is easier to do - is to use ready-made libraries for use with serial port:
QextSerialPort
or
QSerialDevice v 0.1.0 (but better from SVN) :
release: http://fireforge.net/frs/download.ph...ice_v0.1.0.zip
svn:http://fireforge.net/snapshots.php?group_id=199
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