Computed speed

Hello,
thanks for this fantastic project! But I have a question: Is it possible to calculate speed server side? My devices does not report the speed. So I am thinking of using computed attribute to calculate it. Just from current position, previous position and time delta. Is it possible? And if so how can I access the previous position and time delta in the expression of computed attributes? The doc mentions only latitude and longitude primitive objects which as I understand is current position.

If computed attributes cannot be used for this can you propose different solution please?

Well I have read somewhere on this forum that speed attribute cannot be changed. But it is perfectly fine for me to store the calculated speed into different named attribute. Also a rough accuracy is fine for me.

thanks much for any help
Karel

You cannot use computed attributes to access previous position. You would have to modify the code.

Hi Anton! I'm having the same problem: some devices aren't sharing speed data. Is there a computed attribute to calculate this? Or do you know of another method?
Thanks a lot!!!

In newer versions it's possible to get last location, so you could probably calculate it using computed attributes.

Thanks! I'm going to look for documentation on the topic. When I figure it out, I'll post the calculated attribute on this forum so it can serve as a reference. Thanks again!