I'm looking for a telephone operated thermostat monitor I want to buy a system that will alert me via telephone (land line) if the temperature rises above a certain point, to install in a refrigeration room in my bakery.
Anybody knows of a good, reliable, preferably cheap system, or of a way I can build such a thing?
If anyone knows about a better subreddit for this question, please inform me.
SDgoon replied:
a [Sensaphone](http://www.sensaphone.com/sensaphones.php) is what you are looking for.