Wireless iBeacon Receiver distace

BLE Gateway
1

(0.89976) * pow(ratio, 7.7095) + 0.111

this is very bad

2

Sorry. I don’t understand your question. Could you please describe it?

3

288/5000
I’m working with the receiver I mentioned in the title and ptthon in a desktop app, I need to know if they have implemented something for the calculation of distance between the sender and receiver I am using this:
(0.89976) * pow (ratio, 7.7095) + 0.111

But it gives me very variable values

4

Here’s a function to calculate the distance of beacon. But it’s also not accuracy. It’s hard to get the exact distance by RSSI.