September 9, 2012
Ubiquiti AirView is a spectrum analyzer for the 2.4GHz band, which is sadly End-of-Life, but you can still get it from various online stores. Why would you get such a product? Because it is much much cheaper (around 70 Eur) than the other spectrum analyzers I found on the net and its software runs under Linux. This short howto shows you, how to get it running under Ubuntu 12.04.
First you need to install openjdk-7-jre with following command:
apt-get install openjdk-7-jre
Than you need check which java version is the default one:
$ java -version
java version "1.6.0_24"
As in this case it is the wrong one … change it following command:
$ sudo update-alternatives --config java
There are 2 choices for the alternative java (providing /usr/bin/java).
Selection Path Priority Status
* 0 /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java 1061 auto mode
1 /usr/lib/jvm/java-6-openjdk-i386/jre/bin/java 1061 manual mode
2 /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java 1051 manual mode
Press enter to keep the current choice[*], or type selection number: 2
update-alternatives: using /usr/lib/jvm/java-7-openjdk-i386/jre/bin/java to provide /usr/bin/java (java) in manual mode.
As you see I’ve have chosen 2 and the check confirms it:
$ java -version
java version "1.7.0_03"
OpenJDK Runtime Environment (IcedTea7 2.1.1pre) (7~u3-2.1.1~pre1-1ubuntu3)
OpenJDK Server VM (build 22.0-b10, mixed mode)
Now you just need to to download, extract and run the software (don’t forget to insert the AirView into the USB port ;-):
tar xzf AirView-Spectrum-Analyzer-v1.0.12.tar.gz
Following screenshot shows it running on my system. I’ve switched to “waterfall view” in the settings. Click onto it to see the unscaled version:
September 6, 2012
Sometimes I come across Debian or Ubuntu Systems which report following error e.g. during installing new packages:
perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = (unset),
LC_ALL = (unset),
LC_PAPER = "de_AT.UTF-8",
LC_ADDRESS = "de_AT.UTF-8",
LC_MONETARY = "de_AT.UTF-8",
LC_NUMERIC = "de_AT.UTF-8",
LC_TELEPHONE = "de_AT.UTF-8",
LC_MEASUREMENT = "de_AT.UTF-8",
LC_TIME = "de_AT.UTF-8",
LC_NAME = "de_AT.UTF-8",
LANG = "en_US.UTF-8"
are supported and installed on your system.
perl: warning: Falling back to the standard locale ("C").
locale: Cannot set LC_ALL to default locale: No such file or directory
In this special case it is complaining about
de_AT.UTF-8, as the system is setup with German / Austria. To solve this you need to do following:
# locale-gen en_US en_US.UTF-8 de_AT.UTF-8
Important: Replace de_AT.UTF-8 with the language it is complaining about. If you just copy’n’past it will not work, if you’re not from Austria.
After this call:
# dpkg-reconfigure locales
and it should work again.