In article ,
Roger Mills writes:
On 08/02/2012 00:38, Andrew Gabriel wrote:

Had a similar situation with a relative's empty home.
Insurance required min of 16C or drain down and shut off water.
Otherwise, wouldn't pay for frozen pipe damage/repair.

I decided to go for 10C (IIRC), and shut off water, and remote
monitoring.

How did you implement that?

It was very Heath Robinson.
Used a PC and a modem (long before ADSL existed), and a
serial thermometer. Modem picked up my caller-id on an
incoming call which wasn't answered, waited a bit, and
then connected to Demon. I could then retrieve the
values over the Internet.

--
Andrew Gabriel
[email address is not usable -- followup in the newsgroup]