Is it possible to turn the fan on in my thermostat when the upstairs temperature is x degrees higher than the downstairs? I have the lyric thermostat which does have the fan control
Maybe with CoRE?
I do this with CoRE. But not with Lyrics.
Try this code, I actually just worked with this (first smartapp) last night. Have a motion sensor that detects temp, and the thermostat. Run the fan when the temp is off by so many degrees.
/**
- Duane’s Thermostat Fan Director
- Licensed under the Apache License, Version 2.0 (the “License”); you may not use this file except
- in compliance with the License. You may obtain a copy of the License at:
-
http://www.apache.org/licenses/LICENSE-2.0 - Unless required by applicable law or agreed to in writing, software distributed under the License is distributed
- on an “AS IS” BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License
- for the specific language governing permissions and limitations under the License.
*/
// Automatically generated. Make future change here.
definition(
name: “Duanes Thermostat Fan Director”,
namespace: “smartthings”,
author: “Tim Slagle Modified by: Duane Helmuth”,
description: “Adjust your thermostat fan based on the temperature of a secondary temperature sensor”,
category: “Green Living”,
iconUrl: “http://icons.iconarchive.com/icons/icons8/windows-8/512/Science-Temperature-icon.png”,
iconX2Url: “http://icons.iconarchive.com/icons/icons8/windows-8/512/Science-Temperature-icon.png”
)
section
{
input “thermostat”, “capability.thermostat”, title: “Which Thermostat?”, multi: false, required: true
input “tempSensor”, “capability.temperatureMeasurement”, title: “Which temperature sensor?”, multi: false, required: true
input “tempDiff”, “number”, title: “Temperature Difference to turn fan on?”, required: true, defaultValue: 2
input “sendPushMessage”, “bool”, title: “Send a push notification?”, required: false, defaultValue: true
input “sendSMS”, “phone”, title: “Send as SMS?”, required: false, defaultValue: false
}
def installed(){
log.debug "Installed called with ${settings}"
init()
}
def updated(){
log.debug "Updated called with ${settings}"
unsubscribe()
init()
}
def init(){
runIn(60, “temperatureHandler”)
subscribe(tempSensor, “temperature”, temperatureHandler)
subscribe(thermostat, “temperature”, temperatureHandler)
}
def temperatureHandler(evt) {
log.debug "Temperature Handler"
//get the latest temp readings and compare
def currentThermostatTemp = thermostat.latestValue("temperature")
def currentSensorTemp = tempSensor.latestValue("temperature")
def currentThermFan = thermostat.latestValue("thermostatFanMode")
log.debug "Thermostat: ${currentThermostatTemp}"
log.debug "Temp Sensor: ${currentSensorTemp}"
log.debug "Current Fan Mode: ${currentThermFan}"
def difference = (currentThermostatTemp - currentSensorTemp)
//log.debug "Temp Difference: ${difference}"
if(difference < 0){
difference *= -1
}
//log.debug "Temp Difference Now: ${difference}"
if( difference >= tempDiff ){
if(currentThermFan != "fanOn")
{
//set the therm fan state to ON
def msg = "I changed your ${thermostat} fan mode to ON because temperature is out of range from ${tempSensor}"
thermostat?.fanOn()
thermostat?.poll()
log.debug msg
sendMessage(msg)
}
}
else
{
if(currentThermFan != "fanAuto")
{
//set the therm fan state to AUTO
def msg = "I changed your ${thermostat} fan mode to AUTO because temperature difference is in range of ${tempSensor}"
thermostat?.fanAuto()
thermostat?.poll()
log.debug msg
sendMessage(msg)
}
}
}
private sendMessage(msg){
if (sendPushMessage == true) {
sendPush(msg)
}
if (sendSMS != null) {
sendSms(sendSMS, msg)
}
}
2 Likes
Thanks I will give it a try! Do you use this as well?
@Danimous, yes, currently using this 2x in my house; Have thermostat and separate sensor on my top floor, and same on main floor that seems to be helping equalize the temp across the floors.