NicheStack Wont Connect to Server

I would start with the obvious stuff first, make sure the path from that point to your destination at port 502 works and there are not any firewalls blocking you.

I use a utility "netcat" that is common on Linux boxes. Plug into the same router, fire up netcat and try to connect to that machine on port 502 using netcat. If you don't know how to use netcat, check the man page or google. If you can get to that machine through netcat, you know the problem is with your dev board.

David