6 Replies Latest reply on Nov 30, 2016 11:03 AM by ewertonm RSS
    ewertonm Creator

    Ignore some data samples for Alert

    Hello All,

     

    I am creating an application where I monitor a Current data stream and in my case in the begging of the process the property has an overshoot that should not be considered (in Red):

     

     

    I thought about doing a condition with the orange line ( if >7 then Alert). I know I could create a flag and set it but I'm curious to know if there is something that could be done using the Alerts capability.

     

    Any thoughts?

     

    Cheers

    Ewerton

      • Re: Ignore some data samples for Alert
        ttielebein Collaborator

        Sorry, I am confused. You want an alert to fire when what happens exactly?

          • Re: Ignore some data samples for Alert
            ewertonm Creator

            I want the alert to fire when the reading exceeds the limits but not in the begging in the process because it is known that this overshoot makes the property to go over the limit and it is not a problem.

             

            Cheers

            Ewerton

              • Re: Ignore some data samples for Alert
                ttielebein Collaborator

                You should be able to just add an alert to an integer or number property. Alerts do allow you to set a threshold, if that is what you need. Just go to the property in question, edit it, click "Manage Alerts" and then select "Above" as the type of the alert and enter the threshold in the "Limit" box.

                  • Re: Ignore some data samples for Alert
                    sharmon Creator

                    To account for the overshoot, I'd test for conditions that indicated the device was in "startup" mode in the subscription for the "out of range" alert. IOW, in either the subscription, or the service the subscription runs, the first test would be"

                     

                    if (conditions that indicate I'm in startup) {
                      no op, log entry, etc.
                    } else {
                      raise a notification
                    }
                    

                     

                    You may have to be clever to make that determination - I don't know which properties are available to you.

                      • Re: Ignore some data samples for Alert
                        ewertonm Creator

                        Thanks Stephen.

                         

                        This was my initial approach (use subscription instead of using the Alerts capability).

                         

                        One thing that just occurred when me I was replying your message    is that I can create a subscription that monitors one of the variables and add  in the condition:

                         

                        1. if (conditions that indicate I'm in startup) { 
                        2.   me.DisableAllAlerts
                        3. } else
                        4.   me.EnableAllAlerts
                        5. }

                         

                        In this way I can use the OOTB alerts feature.

                         

                        Cheers

                        Ewerton

                          • Re: Ignore some data samples for Alert
                            ewertonm Creator

                            I just tested it and it works!

                             

                            I subscribed to the property and added this code:

                             

                            var params = {

                              persistent: undefined /* BOOLEAN */

                            };

                             

                            (eventData.newValue.value <15.0 || eventData.newValue.value > 490.0)? me.DisableAllAlerts(params):me.EnableAllAlerts(params)

                             

                            Any other feedback is appreciated!