Thank you for the education, I'll give that a shot when I hit the road to install the additional card tonight. Regarding 1,6, and 11, the counts all look about the same though with others in the area that the radio is picking up. Isn't that about the same as using the app on an iphone? The Luci GUI shows the strength of each single, maybe I'll created a script that does the same as the app by evaluating the "iwinfo wlan0 scan" output.
Should be too difficult to parse out Signal and Channel for each of these outputs... 80 of them.
root@ap001:~# iwinfo wlan0 scan
Cell 01 - Address: 0C:EA:C9:81:7E:90
ESSID: "ATTqpbS6uI"
Mode: Master Channel: 1
Signal: -79 dBm Quality: 31/70
Encryption: WPA2 PSK (CCMP)
Cell 02 - Address: 0C:EA:C9:5F:E5:70
ESSID: "ATTrvvYW6a"
Mode: Master Channel: 1
Signal: -70 dBm Quality: 40/70
Encryption: WPA2 PSK (CCMP)
Cell 03 - Address: 84:18:3A:17:1D:A8
ESSID: "SpringHill Suites_GUEST"
Mode: Master Channel: 1
Signal: -83 dBm Quality: 27/70
Encryption: none
Cell 04 - Address: 84:18:3A:57:1D:A8
ESSID: unknown
Mode: Master Channel: 1
Signal: -81 dBm Quality: 29/70
Encryption: WPA2 PSK (CCMP)
Cell 05 - Address: CA:3A:6B:F1:4F:5D
ESSID: unknown
Mode: Master Channel: 1
Signal: -85 dBm Quality: 25/70
Encryption: WPA2 PSK (CCMP)
Cell 06 - Address: 00:9C:02:D3:C1:BA
ESSID: "HP-Print-BA-Officejet Pro 8600"
Mode: Master Channel: 6
Signal: -50 dBm Quality: 60/70
Encryption: WPA2 PSK (CCMP)
Cell 07 - Address: 84:18:3A:06:10:48
ESSID: "CableWiFi"
Mode: Master Channel: 2
Signal: -63 dBm Quality: 47/70
Encryption: none
Cell 08 - Address: 84:18:3A:46:10:48
ESSID: "TWCWiFi"
Mode: Master Channel: 2
Signal: -63 dBm Quality: 47/70
Encryption: none
Out of 1,6, and 11... 1 looks to be the least used:
16 1
24 11
22 6
Setting it to 1 now.
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Your decision should be based on:
- which channel has a combination of least noise (you can see this on OpenWrt once you change channel); and
- then second, least SSIDs on-channel
iwinfo shows Quality signal/noise I'm assuming, but they are all the same on the noise metric "70"
after setting a channel to use you can check the Signal with
# iwinfo wlan0 info | grep Signal
Signal: -54 dBm Noise: -94 dBm
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In this example SNR == 40.
I see, already in logarithmic form being in db, so 54 - 94, thanks guys. So the higher the number, in this case it being 40 the better. Hope to have it at least on the best channel before driving down there to put in second radio, 45 minute drive.
Was under the impression that placing the Channel on "auto" already did this for you and selected the best channel. Guess not?
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