I have been reading about Bacnet/WS in ANSI/ASHRAE Standard 135-2012.
Does anyone have some XML samples of how the request and response should look like? E.g how should the request for getValue look like and how should its response look like?
There are some examples in Addendum 135-2012am and much more specification of the general "BACnet/HTTP" stuff. Note that the addendum is currently a draft but I guess it will improve the ASHRAE Standard 135-2012 official soon.
See also the 1st Advisory for more information.