Newbie and having a code issue with a temperature object

Developer Programs Writing SmartApps
1

I have a smartthings app I am trying to write. It is using a Samsung motion sensor with temperature. The device is defined as a smartsense motion sensor. I will post the code. In my preferences section I set it as a “capability.temperatureMeasurement” type and I subscribe to it. The events are working. Any time I try to access mytemp object I get a null point of not found. I will post the log statements and I have tried various things but with no object they are not going to work. Now my dry contacts object is found and I have no issues with it. I know I am doing something very stupid but I just can’t seem to resolve this. I will include the logs and smartapp code. Any help would be appreciated.

Logs

91518d17-0198-4d3f-898d-3ca93d8e45aa 2:40:58 PM: error java.lang.NullPointerException: Cannot invoke method currentValue() on null object @line 63 (temperatureChangedHandler)
91518d17-0198-4d3f-898d-3ca93d8e45aa 2:40:58 PM: debug Temperature object null
91518d17-0198-4d3f-898d-3ca93d8e45aa 2:40:58 PM: debug Contacts Object FortrezZ MIMOlite
91518d17-0198-4d3f-898d-3ca93d8e45aa 2:40:58 PM: debug Temperature Changed Detected 71.0

Code

/*  Copyright 2019 Mike Calhoun
*  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.
*
*/
definition(
    name: "Pellet Stove Wireless Heat Thermostat",
    namespace: "calhounm",
    author: "Mike Calhoun",
    description: "Control Pellet stove with temperature sensor and dry contacts",
    category: "My Apps",



preferences {
    section("When this temperature sensor:") {
            input "mytemp", "capability.temperatureMeasurement", required: true, title: "Sensor?"
      }
    section("Low Temperature Set Point") {
      input "lowsetpoint", "number", required:true, title:"Low Temperature SetPoint"
    }
    section("High Temperature Set Point") {
      input "highsetpoint", "number", required:true, title:"High Temperature SetPoint"
    }
    section("Turn Up Heat Contacts") {
        input "thecontacts", "capability.switch", required: true
    }
    
}

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

      initialize()
}

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

      unsubscribe()
      initialize()
}

def initialize() {
      // TODO: subscribe to attributes, devices, locations, etc.
    subscribe(mytemp, "temperature", temperatureChangedHandler)
}    

// TODO: implement event handlers
def temperatureChangedHandler(evt) {
      log.debug "Temperature Changed Detected ${evt.doubleValue}"
           /*log.debug "high level  temp ${mytemp.currentTemperature}"*/
      log.debug "Contacts Object ${thecontacts}"
      log.debug "Temperature object ${mytemp}"    
      def tempattr = mytemp.currentValue("temperatureMeasurement")
      /* def tempattr = mytemp.currentValue("temperature").doubleValue()*/
      log.debug "The current temperature is ${tempattr instanceof Number}"
      
      log.debug "The current temperature is ${tempattr}"
          def currentValue = thecontacts.currentValue("switch")
          log.debug "the current value of mycontacts is $currentValue"
          log.debug "the current value of mycontacts is ${currentValue instanceof String}"

       def latestValue = thecontacts.latestValue("switch")
       log.debug "the latest value of thecontacts is ${latestValue instanceof String}" 

            if (evt.doubleValue < lowsetpoint) {
                  updateCheckIfHeatIsOn()

        } else {
            if (evt.doubleValue > highsetpoint) {
                  updateCheckIfHeatIsOff()
            }
        }
    
}

def updateCheckIfHeatIsOn() {
      /*thermostat.setThermostatMode(desiredMode)*/
      
      log.debug "check if heat is on because below low set point"
      /*log.debug "high level  temp ${mytemp.currentTemperature}"*/
      def tempattr = mytemp.latestValue("temperature")
      log.debug "The current temperature is ${tempattr instanceof Number}"
      log.debug "The current temperature is ${tempattr}"
      thecontacts.on()
}

def updateCheckIfHeatIsOff() {
      log.debug "check if heat is off because above high set point"
     /* log.debug "high level  temp ${mytemp.currentTemperature}"*/
      def tempattr = mytemp.latestValue("temperature")
      log.debug "The current temperature is ${tempattr instanceof Number}"
      log.debug "The current temperature is ${tempattr}"
      thecontacts.off()
}
2

I am not sure why it jumbled up my code and there is a /* for comment that only shows / above. If someone can tell me how to post the code that shows up normal that would be great as well.

3

Surround the entire block of code with 3 back-single-quotes (like below, but without the space).

`` `
Code

`` `

4

Thanks I will do that in the future.

Also I restarted my hub and disconnected devices from app and reconnected and code started working fine.

Thanks

5

You can hit the pencil on your post and edit it to fix it. Much more likely to get help that way.

Or post on GitHub, gist, or Pastebin.

6

As Terry said, if you can edit to put your code in a code block it’ll be easier to read. But, I think this:

Should be:

mytemp.currentValue(“temperature”)
1 Like
7

Edited original post to fix the unformatted code. @calhounmike Take a look at your post’s source to see how it’s done for future reference. :+1:

1 Like