I've just been working on updating the LCD switch display to use a
newer board. As part of this I added support for extended UID's but
found there isn't a reference on the web. I guess this needs some
focus before we create mildly different variants in our code.

In the same way, ID=xxxx needs adding to BSC and some clarity added.

I'm willing to have a go at BSC 1.4 for the extensions but what else
needs adding or changing?

Lehane
http://www.mm-wave.com/honeycottage/xaplcd2.htm for the display. I'll
add photos in the back box shortly.