Actually I’m running the dia.py sample aplication using Python, the problem is that I found Python too tricky to use for me. I would like to find a way to develop my applications using Vb .NET or another language, I think it might be possible using a socket connection but I don’t know how.
The gateways only run Python on them, it shouldn’t be too tricky if you know how to program, and the wiki pages are a great help: http://www.digi.com/wiki
To further Charlie’s suggestion, if you set up standard “Dia” configurations, then your .NET app can use RCI (HTTP with XML) to read/write the sensors on the gateway. So Python then just a stock tool. You’d want to experiment with the Digi ESP IDE to configure the gateway. I am not expert at using RCI (being a Python expert :-] )