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[medic5678]

what do i need to have the ambient temperature monitored by my system, which is then able to turn an appliance module on/off as needed?  i am running dehumidifiers in places that can get too cold for their operation (freezing up), and i'd like to be able to monitor temps to enable operation only when the temp is above a 45 degrees.  am also looking to automate a greenhouse i'm builidng based on ambient temp. 

as always, any advice appreciated .

[dave w]

Any thermostat providing a closure can interface to X10 through the PF284 Powerflash interface. A clousure causes the Powerflash to send an X10 "ON" command and an open causes an X10 "OFF" command. Also, there are posts on using DS10 and DS12 wireless security transmitters to accomplish the same, but you need AHP and a CM15A to receive the transmissions and act on them. Search the forum for DS10 (DS12) and temperature.

[JeffVolp]

A more elaborate controller than the X10 products can actually measure analog values.  I use the Ocelot here to measure temperature at several locations to control auxiliary ventilation and to adjust the irrigation cycles.  With a simple thermistor and some math, I have the Ocleot convert temperature to degrees F with one degree accuracy over the range from 50F to 100F.

Jeff