Speaking on Deep Background, the Press Secretary whispered:
Oops, somebody's already done it:
Mixed-signal and digital signal processing ICs | Analog DevicesLooks like the total hardware cost would be around $100 for the TINI
and board, and $8 for each sensor (iButton and holder). I have little
time and no Java skills, otherwise it looks like a cool project. If
somebody wants to develop a machine room temperature monitoring
network out of them, I'd be a beta tester
That looks a lot closer to the Yellow Brick Road than anything
else suggested to date. I like the 64 bit SN idea; sounds like
MAC addresses...
Note there are several analog temp sensors out there -- National
has a line that is dirt cheap ($~1.00) and work on current loops
[i.e. LONG leads are OK..] so if someone has a SNMP driven A-D....