Only get changes using user_data

Developer's Corner General Dev Discussions
1

Hello,

On the UI simple page (http://wiki.micasaverde.com/index.php/UI_Simple#lu_sdata:_The_polling_loop), you can use lu_sdata to only get changes since your last request. Does the same feature exist with user_data? If not, is calling user_data every second a particularly intensive operation for the Vera Edge?

Thanks for the help

2

You use user_data when to get the whole data and status to get updates.

3

According to the page: http://wiki.micasaverde.com/index.php/UI_Notes#Tracking_status_changes

I can have a ‘long poll’ and only changes will be sent to me. I’ve tried this using the URL: http://:3480/data_request?id=status&LoadTime=DataVersion=&Timeout=60&Minimumdelay=2

However it simply returns the full status response, regardless of whether there have been any changes or not. Should it be doing this?

Thanks for the help

4

You have to be careful with the values of LoadTime and DataVersion - where are you getting them from?

5

From the previous request. Example url: http://:3480/data_request?id=status&LoadTime=1446892313DataVersion=892339820&Timeout=60&MinimumDelay=2

6

You’re sure you’re using the value from [tt]DataVersion[/tt] and not from [tt]UserData_DataVersion[/tt] ?

7

Yea using dataversion.

I’ve spotted the problem - there was a missing & between the loadtime value and dataversion parameter in the URL

8

Ha yes! I actually cut and pasted your string for a start, and thought I had deleted the & when plugging in my actual load time. Well spotted. Always pleased to hear that Vera works the way that you think it’s supposed to work.