Folks have been requesting an app to manage temperatures and humidity build up. Typically used to manage vacation homes remotely. Also useful for older homes without a thermostat or rooms which has heater and cooler appliances in them with no HVAC. Here is an app for the same.
You can define the High and Low temperatures sensors (independently) as well as action to take like turning on HVAC's, Fans/switches, heaters etc. It will automatically turn them off once the temperature is out of the extreme zone (currently configured for 1 degree (C/F) above or below the extreme temp defined).
You can also monitor a Humidity sensor and correspondingly define a set of action to take/device to turn on (HVAC, dehumidifiers, switches etc) to remedy the situation and it will automatically turn them off after the humidity return to 5% below the threshold.
You can define upto 3 operating schedules for the heating and cooling appliances (these will only turn on during the schedule but will turn off when the desired temperature/humidity thresholds are achieved)
You can also define the operating modes, like scheduled modes will control when appliances are turned on.
If you have any feature requests please send it in.
This app is available on the RBoy apps server (along with all the rest of the premium and free apps) http://smartthings.rboyapps.com.
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The latest version of these apps with udpates are available on the RBoy server.