Problem while reading the data from RS232 using Qextserialport

[calhal]

Actually that is not my problem, I am new to the threads concept.

Maybe you're right. But please try to change

if(port->bytesAvailable())

if(port->bytesAvailable())

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to this

if(port->bytesAvailable()>0)

if(port->bytesAvailable()>0)

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and this

i = port->read(buff,numBytes);

i = port->read(buff,numBytes);

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into this

if ( (i = port->read(buff,numBytes) <=0 ) return;

if ( (i = port->read(buff,numBytes) <=0 ) return;

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And again why 1ms?