Help with attributes - and everything else

Hi folks. Once again I’m delving into writing / tweaking smartapps and I’m running into the same problems I always seem to. Specifically subscribing to events, using attributes, etc. I have worked out a few issues, but am having real problems getting certain attributes from my thermostat. Any help would be appreciated.

I need to retrieve and make decisions based upon the current heating and cooling setpoints. But here’s the log data I’m getting:

ThermostatCoolPoint = null, ThermostatSetpoint = null, ThermostatHeatPoint = null.

I have also never figured out how one posts code in a sane format, but that’s a different issue :smile: The code is extremely simple. Why am getting null responses???


  • HVAC Zone Equalizer
  • Copyright 2015 Jeff Lunglhofer
  • 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:
  • 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.

name: “HVA/C Zone Balancer”,
namespace: “everest123”,
author: “Jeff Lunglhofer”,
description: “Toggle air handler to recirculate air when two areas are not the same temperature.”,
category: “Green Living”,
// iconUrl: “”,
// iconX2Url: “”

preferences {
section(“Title”) {
paragraph “Use HVA/C fan to equalize between the thermostat and a second temperature sensor.”
section(“About”) {
paragraph “tbd”
section(“Thermostats”) {
input “thermostat”, “capability.thermostat”, title:“Select thermostat to be controlled”, required: true
section("Choose a temperature sensors… "){
input “sensor”, “capability.temperatureMeasurement”, title: “Temperature sensors to balance temperature”, required: true

def installed() {
log.debug "Installed with settings: ${settings}"

def updated() {
log.debug "Updated with settings: ${settings}"

def initialize() {
state.fanRunning = false;
log.debug "Subscribing to events!"
subscribe(thermostat, “thermostatMode”, checkThings);
subscribe(thermostat, “thermostatFanMode”, checkThings);
subscribe(thermostat, “heatingSetpoint”, checkThings);
subscribe(thermostat, “coolingSetpoint”, checkThings);
subscribe(thermostat, “thermostatSetpoint”, checkThings);
subscribe(thermostat, “temperature”, checkThings);
subscribe(sensor, “temperature”, checkThings);

def start_circulate(){
// if (sensor.currentValue(“temperature”) >= runtemp)
{ DEBUG (“into start_circulate() if statement”)

def checkThings(evt) {
log.debug "Event Detected!"
def thermostatTemp = settings.thermostat.currentTemperature
def sensorTemp = settings.sensor.currentTemperature
def thermostatMode = settings.thermostat.currentThermostatMode
def thermostatFanMode = settings.thermostat.currentThermostatFanMode
def thermostatHeatPoint = settings.thermostat.currentheatingSetpoint
def thermostatCoolPoint = settings.thermostat.currentcoolingSetpoint
def thermostatSetPoint = settings.thermostat.currentthermostatSetpoint

log.debug "Event Detected!"
log.debug "$evt.displayName is $evt.value"
log.debug "ThermostatTemp: $thermostatTemp, Remote Sensor: $sensorTemp, ThermostatMode: $thermostatMode"
log.debug "ThermostatFanMode = $thermostatFanMode, ThermostatHeatPoint = $thermostateHEadPoint"
log.debug "ThermostatCoolPoint = $thermostatCoolpoint, ThermostatSetpoint = $thermostatSetpoint"