Re: Atheros and how to convert RSSI to dBm
Rui Paulo <[email protected]>
| Newsgroups | gmane.os.freebsd.devel.mobile |
|---|---|
| Message-ID | <[email protected]> |
On 26 May 2010, at 23:25, Miroslav Chlastak wrote: > Hello, > > is there a way how to convert RSSI from output of "ifconfig ath0 list sta" to dBm?: > > [snip] > > ADDR AID CHAN RATE RSSI IDLE TXSEQ RXSEQ CAPS FLAG > 00:4f:62:1d:d8:5d 14 9 11M 18.5 0 15932 22400 ES A > > [snip] > > I my test enviroment I use this function: > noise floor + RSSI*2 = signal of client in dBm > > Then i get the same value as from "tcpdump -n -i ath0 -p -y IEEE802_11_RADIO": > > [snip] > > 10:41:04.746395 86402611933us tsft short preamble 58.5 Mb/s -61dB signal -98dB noise antenna 1 [0x00000012] IP 10.0.0.1.2049 > 192.168.100.2.123: NTPv3, Client, length 48 > > [snip] > > > Right? Or is this conversion "stupid"? Some better idea? > > Is there a way how to get noise floor via "ifconfig"? I get it from output of "athstats" :( No, there's no way right now. Check this: http://lists.freebsd.org/pipermail/freebsd-stable/2006-September/028895.html Regards, -- Rui Paulo _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-mobile To unsubscribe, send any mail to "[email protected]"