My 'class::OnReadyRead' never runs to completion -- that's the first problem.

The second issue is I don't understand how to set up the structure of my program using Qt. I have i/o going on with several devices. The i/o uses software 'handshaking', in that I talk to my device, wait for a response, verify the response (take corrective action if necessary), rinse and repeat. The thread communicating to the device should block while waiting for a response (so in this sense there is blocking involved).

So I'm really trying to figure out what method to set this sort of system up in. What I did initially was set up threads to talk to my devices, and block them using wait conditions after they had sent something to the device. I then tried to use signals (to and from the main application thread) to tell these threads to unblock, but this didn't work.

When you say 'signals and slots are your friend' could you please emphasize in the context of what I'm trying to accomplish? I really appreciate the help so far.

-KF