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Thermostat?

Posted: Sat 25 Feb 2012, 17:19
by hmmhhh
Could someone help how to make a Thermostat? So when my datasource (weather station indoor temp) go under 5 celcius device go on. when it rises abobe 5.3 it turn device off. :roll:

Re: Thermostat?

Posted: Sun 26 Feb 2012, 00:26
by Martin
The key here is "hysteresis"...

Create a group schedule linked to a rule, where the group schedule is set to be turned on at 00:00.
Specify that the rule is fulfilled when the temperature (collected from an existing data source) is less than 5 degrees, with a hysteresis of 0.3 degrees. This means that when the temperature drops between 5 degrees, the device will be turned on.
It will stay on until the temperature reaches 5.3 degrees.

Re: Thermostat?

Posted: Tue 04 Sep 2012, 16:23
by Isachris83
Hi,
I have the same quesion but for two differents periods.
I would like to have 18°C-19°C from 6 AM to 23 PM and 15°C-16°C from 23 PM to 6 AM the day after. What should i do ?
Two shedules (resp. On at 6AM-Off at 23PM and On at 23PM-Off at 6AM) don't work.
thanks,

Re: Thermostat?

Posted: Tue 04 Sep 2012, 20:45
by Martin
This should work, but the server might think that since you have contradictory actions at the exact same time - i.e. both an On and an Off at 6AM, Switch King might have problems with these entries due to that they would take each other out.

You will probably see a warning message regarding this in Switch Kings log file.

If you make the schedules overlap - i.e. one schedule turns on at 06:00 and one off at 06:01, you might get around this.

Re: Thermostat?

Posted: Tue 11 Sep 2012, 16:26
by Isachris83
I have fixed the problem as you described. I let a few minutes between two commands and that works perfectly.
Thanks !

regards,