I want to calculate distance from wifi router in c/c++ code.Now I am trying a method which use RSSI and FSPL to calculate distance.
RSSI = Ptx – 10 * n * log10(d)
d = 10 ^ ((Ptx – RSSI) / (10 * n))
Ptx is the transmitter power in dBm.
n is the path-loss exponent.There are ranges of n for every type of area
2 for free space,
2.7 to 3.5 for urban areas,
3.0 to 5.0 in suburban areas,
1.6 to 1.8 for indoors when there is line of sight to the router.
But I want to find more universal formula thats works everywhere.So I have found that I can use signal-to-noicse ratio for more accurately estimate.
How is it works or is there any formula that I can use?
I have found similar links but there are not helpfull –