"actually i am new in Crestron programming, i just finished my basic P101 training, so i don't konw how to create a moudule."
You don't *have* to make a module to control the device.? You could very likely drop an SIO symbol in your program, connect the tx/rx to the com port being used by the AVT100N, and be able to get all the control/feedback you need from populating the SIO.
The majority of Extron products have control that is so straightforward that no one bothers making modules for them...
? - Chip
