After too many hours of struggling though trial and error, packet sniffing, and lots of various materials found on the Internet, I have uncovered a few very important secrets that were not readily apparent in the official vendor documentation I had available.
The device I was working with: Trane UC400 BACnet Communications Interface
In general, none of the BACnet configuration software or documentation makes reference to the number of data bits, parity, or stop bits used. Baud is the only thing that is set. The problem is that unless you are integrating with something specific to BACnet, you will need to set these parameters. Here they are: Continue reading

I am on a quest to convince people, especially controls and automation people, to stop crimping RJ-45 ends on Ethernet cables. Everyone else in the world terminates Ethernet to a punchdown block jack and then uses a pre-tested, pre-molded patch cable to connect to the device. The reason to avoid crimping on the RJ-45’s is that it is difficult to reliably crimp the ends on correctly, especially if you have to use an electrician who would rather be bending 3″ rigid conduit and is trying to use the Mickey Mouse crimp tool he bought at the dollar store.
The grandson thought about it for a minute and then asked his grandfather, “Which wolf will win?”
For about 1/4 the cost of a Fluke, I decided to take a risk and buy a Chinese process meter. This company makes a clone of the 787, but I opted for the YHS-302A model (which now seems to be the YHS 7011) because it seemed to have more bells and whistles. (see bottom of article for update)
I came across this gem from 
