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### Topic: i need RSSI value to distance calculation formula (Read 822 times)previous topic - next topic

#### anbu123

##### Mar 02, 2018, 12:34 pm
any formula for finding distance from rssi values

#### mauried

#1
##### Mar 02, 2018, 10:54 pm
There isnt one .
RSSI is useless for measuring distance.

#### anbu123

#2
##### Mar 05, 2018, 09:20 am
Any other methods for finding distance between access point and client device??

#### PaulS

#3
##### Mar 05, 2018, 04:11 pm
Quote
Any other methods for finding distance between access point and client device??
A tape measure.

#### NicoleClicquot

#4
##### Mar 06, 2018, 12:45 pmLast Edit: Mar 06, 2018, 12:52 pm by NicoleClicquot
Funny question...
No there is not a general formula as RSSI is different in every location.

However, on 1 local fixed location:
It is possible to measure RSSI with most devices/libraries....
It is also possible to measure actual distance with a tape measure....
So just move your device away from the access point in a straight line and write down the RSSI values with every meter further away from the access point.

You could then display that saying something like
if (RSSI > 10) then 1 meter
if (RSSI > 20) Then 2 meters

However, it is not linear and has a lot of other variables.
RSSI is not stable so your outcome would be a ball park number.
However, could be fun to play around with it, dependent on your application.
Let us know you progress and application / project...

#### Thomas499

#5
##### Jun 23, 2018, 04:59 pm
I'll be happy to explain the reasons RSSI is bad at distance and why it fluctuates so much. I actually researched this area quite extensively.  I.e. huge difference between dry day and rain day "moister in air" doors opening and closing, there are many reasons. If you insist on going this route I suggest

First recommendation: you stick to proximity, forget the concept of distance instead if you get _x_ reading or better then you are close (in room).