The new version is a very good improvement on making the BT connection understandable!

My congratulations again on being the first to make a successful, reliable BT OBD data application!

Suggestions:
1. After the user clicks [OK] on the configure screen, put up a message like "Go to Connect to ECU to begin" or something so the user will not wonder if it is already connected or what to do next.
2. pyOBD can detect a BT device that it cannot connect to, so it might help if every 15 seconds it has not connected it displays the "Connecting" message, and then at 45 seconds if it cannot connect displays an "Unable to connect" message & stops trying. This will keep the user from wondering if it is able to connect or not.
3. If "Disconnect" is clicked either while pyOBD has successfully been connected, or if it is still in the "Connecting" loop, a "Disconnecting" message should display. Now, when "Disconnect" is selected, there is no acknowledgment that it is disconnecting, & the Link State value continues to display "Connected" or "Connecting".

You say it is only a "rude" adaptation, but it performs very nicely. Looks good, easy to understand, & even pretty fast! Very well done.