Alert configuration for remote values streaming in from the device.

Question

Hello,
I have multiple devices of same type where 2 sensor parameters which are streaming in from the device to the platform lets say T1 and P1
Based on that i have created multiple remote things to access those parameter values.
 
Now i need to create a UI where i need to allow the user to configure the threshold for T1 and P1 with lolo,lo,hi and hihi.
Whenever the streaming value crosses configured threshold value, i need to run a default service for lolo,lo,hi and hihi respectively.
To achieve it, what should be my approach in saving those threshold for each device, and how should i make the configuration for properties such that when it crosses certain threshold, it runs the service automatically.
 
Thanks
Sunay

supandey · Accepted Answer

Yes its correct understanding, acknowledging alert shows that someone is working on it. E.g. if the motor temp is high and is raising an alert. By acknowledging alert you only show that someone is working on it lets say that it will require reducing RPM on the motor. So unless this action is taken to reduce the motor temp alert will be active.

Whether or not its in Acknowledged state would depends on someone or any automated entity acknowledging it to show certain action is underway to handle the alert.

Acknowledging it will only move it to the Acknowledged state, it doesn't mean the alert is not active, see attached AlertHistory screenshot from my e.g. which shows how an alert was moved from Unacknowledged to Acknowledged with a comment added by the user Administrator that it is being worked upon - but alert is still active.

I can see the summary when i used the GetAlertSummary service on the thing where the property exists on which the alert is active, you can see that in the attached screenshot called GetAlertSummary

supandey · Answer

Hi Sunay, you could consider creating threadshold as a property which will store the values set by the users via your UI and then create a subscription on DataChange event for that Thing/ThingTemplate which contains the streaming property values.

Then you can either write your compare script in that subscription or simply call your already existing compare script which can invoke your default service as needed.

With this whenever there will be new data streaming into the ThingWorx platform, it will file the DataChange event which will invoke the subscription to compare against the threshold value which in turn will execute the default service.

Hope this'll help.

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