WIFI Config and Troubleshooting

The WIFI access point (aka AP24) is mounted on the deck railing of building 2, with an ethernet cable running across the steps and into the window of the "ops" center, where its connected to the P+DATA OUT side of a power-over-ethernet injector. A short ethernet cable is connected from the DATA IN side of the injector to the router. The injector has a power led, but the AP24 itself has no visible status LEDS. The most likely point of failure is a faulty cable or connection.

The router gives the AP24 a fixed address of 192.168.0.130.

Point a browser at it (http://192.168.0.130) and login via the text boxes in the upper right, account "admin". The password is the usual one about sonics. Then, in the menu on the left, select "RegTable" to see the registration able of WIFI clients that have attached, along with their signal strengths.

You can also ssh into the admin account and check the registration table, as well as many other things. Enter the command interface wireless registration-table print. The command line shell on the AP24 does TAB expansion, so you only have to type the first few characters of each word in the command and hit TAB to expand the command. Do quit to exit:

ssh admin@192.168.0.130
[admin@Alico] > interface wireless registration-table print
 0 wlan1-Int-Ant                     00:20:F6:05:1E:D5 no  -26dBm... 11Mbps  2d23h5m21s
 1 wlan1-Int-Ant                     00:20:F6:05:25:8B no  -35dBm... 11Mbps  2d20h30m8s
 2 wlan1-Int-Ant                     00:20:F6:05:24:85 no  -20dBm... 11Mbps  20h28m23s
 3 wlan1-Int-Ant                     00:20:F6:05:24:4F no  -46dBm... 11Mbps  1h14m22s
 4 wlan1-Int-Ant                     00:20:F6:05:16:CD no  -49dBm... 11Mbps  5m3s
[admin@Alico] > quit

The router assigns fixed IP addresses to the Etherant station adaptors based on their MAC address.

Using the above MAC addresses, one can relate the signal strengths reported by the AP24 to the Etherants. In the above example, the signal strengths are between -29 and -49 dBm. These are good signal values.

The Etherants also have a web interface. Point a browser to one of the above IP addresses. If the complete page does not render in firefox do ctrl-F5 to flush the cache, where F5 is the function key (but you don't have to press the *Fn" meta-key).

The Etherant web interface shows the SNR under the Info tab. The SNR values have been above 50 dB, except at the OSU Sodar, which showed 35dB, which is acceptable.

WIFI and Ethernet Clients

The ethernet interface on the OSU thermocouple logger was damaged by lightning - so it is probably not responding.

ssh to a DSM

The aster account on "gully" and "flux" has a $HOME/.ssh/config file which provides shortcuts to ssh to a given DSM:

• ssh c20 DSM at C via WIFI
• ssh m21 lower DSM on main tower via WIFI
• ssh m22 upper DSM on main via WIFI

Spare AP24

There is a spare AP24 in the trailer. The spare should work identically to the original, except that the router will give it an address of 192.168.0.131.