Determine the count over date range via Pivot/Macro

Dear Folks,

Excited to be here and learn from the Excel Guru's.

There is a specific task where I have been spending time over formulas and need your inputs if this can be done over pivot.

I have 100x Devices (Badge No or Serial No) which provide a certain performance reading daily. I need to know exactly which devices have been giving consistent reading in last 30 days, 29 days, 28 days and so on to identify each device accordingly.

Any support / direction is highly appreciated.