Freelancer for a help on a container application

Hello all,
I need a help from a freelance able to change the behavior of a dashboard.
I got a container with 3 widgets (3 grids that show laboratory’s tubes data). They are updated by barcode scanners that insert data into a mysql table.
At the moment the basic solution I found is to make a 2 second refresh in order to have grid data update as much as fast possible .
The issue I got is that it’s very ugly to see and the continuos blinking make users a bit upset.
GOAL: hide the blinking of tree widgets but in the same time to see the data grids updated.

Video link : https://youtu.be/1-1B-gQCTVc

Hello.

In each application of the widget must use ajax to update the data thus avoiding the blinking of the pages.