HiWe were in the middle of an installation at a club yesterday, and couldn't get the GPI box working and connecting to VisualDMX.
-Finally we went trying put some 12v power at power input, and then it came to life and worked like a charm.
The data sheet that came with the box says that:
"
The GPI features 8 contact-closure input ports and is USB powered."
But your website says following under "Minimal Requirements"
"
External PSU 8-12V DC"
You need to get your information synchronized or formulated differently, because it did give for example, us, some headaches
Best RegardsHillmann