Edit device, click attributes, add speed limit. That's NOT a computed attribute. Not sure why you would think it is.
Thanks Anton, I did not know where to configure and I thought it could be in computed attributes.
On the other hand I would like to know if you can enable the UI of the device edition for a user with read-only device permissions?
No, you can't. That's the whole point of read-only user.
how to configure the speed limit in computed attributes so that it arrives notification via mail in meitrack equipment.
where I set the speedLimit attribute for the device in the UI