How to classify rssi of beacon as High, medium, low , poor range with +4dBm TX power

[bivay]

I am using NRF52832 as Beacon, I want to classify the RSSI as High, Medium, Low, and Poor based on RSSI.

I am using SDK14.2.0 for Beacon and Gateway.

And using +4dBm Tx power of Beacon.

Thank You

Bivay