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Old 04-04-2012, 03:00 AM   #1
p_faiz
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how to get exact wireless signal level in dbm or watt?


hello everyone,

I was trying to get the signal strength of all the APs in the range.But the problem is I am getting signal level with out any unit like: signal level:203 what does this 203 mean because I need value either in dbm or watt.How to get the exact signal value or how to convert this signal level.Iwconfig help tells that


Signal level
Received signal strength (RSSI - how strong the received signal is). May be arbitrary units or dBm, iwconfig uses driver meta information to interpret the raw value given by /proc/net/wire- less and display the proper unit or maximum value (using 8 bit arithmetic)
any help will be highly regarded.
 
Old 04-04-2012, 07:15 AM   #2
michaelk
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Welcome to LinuxQuestions
AFAIK it isn't possible to get an exact signal level from an RSSI value.

http://www.wildpackets.com/elements/...l_Strength.pdf
 
Old 04-04-2012, 09:30 AM   #3
p_faiz
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I did not mean by exact value the accuracy but problem is the value is with no unit like : signal level 204 so what does it mean ?the link you have provided is of no use in this domain as I have seen it already.
I just want to get the signal level in dm or power unit watt for all APs in range

any other guidance will be highly appreciated.
 
Old 04-04-2012, 09:36 AM   #4
p_faiz
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sorry previous reply carries errors

I did not mean by exact value the accuracy or precision but problem is the value got by using iwcommon.c, is with no unit like : signal level 204 so what does it depict ?the link you have provided is of no use in this domain as I have seen it already.
I just want to get the signal level in dBm or power unit watt for all APs in range

any other guidance will be highly appreciated.
 
Old 01-25-2013, 09:43 PM   #5
fhleung
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Quote:
because I need value either in dbm or watt
You think command iwconfig able to tell this info ?


Does anyone heard about WIFI HOPPER such software? This program may help to get signal level in dbm or watt

Was there any similar thing in Linux ?
http://wifihopper.com/

Last edited by fhleung; 01-25-2013 at 09:49 PM.
 
  


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