Most of our code examples are published not only on the forums but in the application note section of the matrixorbital.ca
site. Unfortunately, we don't have any Delphi examples specifically for the GTT.
For touch events in a C# environment you will see we have used a dedicated thread for reading as in the GLT240128 example. Using C# in the Visual Studio the data received event is run on a secondary string and a response is not guaranteed for every byte received, thus the dedicated thread.
Investigate your documentation to find the best read method, take a look at the examples provided, and if you have any questions don't hesitate to post.