I need some help here. I need to have a standard PPM servo interface with matlab so that I can give it a command in simulink and have a response. I found this device, which eliminates the need to use PPM in simulink. http://www.parallax.com/detail.asp?product_id=28823 Basically, it takes the servo command and converts it to a serial USB port. Now, I need to know how do I open this com port in simulink and get it to work? Im not an EE, and I dont know how to do this. I have used the com port once before in matlab, but not simulink. Any help, PLEASE!? -this is what happens when an ME takes an EE lab course. It hits the fan.