HOWTO: Install Lejos 0.9 on Ubuntu 11.10 (Oneiric)

[bullestock]

I thought I would contribute this step-by-step guide to installing on Ubuntu:

1) Install Java as described here: http://www.webupd8.org/2011/09/how-to-install-oracle-java-7-jdk-in.html

2) Edit your .profile and add:

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export LEJOS_NXT_JAVA_HOME=/usr/lib/jvm/java-7-oracle
export NXJ_HOME=/opt/lejos_nxj


3) Install prerequisite packages:

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sudo apt-get install libusb-dev
sudo apt-get install ant


4) Do udev setup:

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sudo addgroup lego
sudo usermod -a -G lego <your login>


Create /etc/udev/rules.d/lego-mindstorms-nxt.rules:

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BUS=="usb", SYSFS{idVendor}=="03eb", GROUP="lego", MODE="0660"
BUS=="usb", SYSFS{idVendor}=="0694", GROUP="lego", MODE="0660"


5) Extract LeJOS tar file into /opt/lejos_nxj

6) Build LeJOS:

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cd /opt/lejos_nxj/build
ant


7) Flash the firmware into your NXT (see http://lejos.sourceforge.net/nxt/nxj/tutorial/Preliminaries/GettingStartedLinux.htm)

[s.frings]

If you have a Bluetooth interface, all the USB related configuration is optional. Bluetooth also works fine with 64bit java, which is not the case with USB.

[skoehler]

If you have a Bluetooth interface, all the USB related configuration is optional. Bluetooth also works fine with 64bit java, which is not the case with USB.

Both bluetooth and USB works on 32Bit and 64Bit Linux without any problems. If USB does not work for you on 64BIt, please us know what errors you're seeing.

[bullestock]

If you have a Bluetooth interface, all the USB related configuration is optional. Bluetooth also works fine with 64bit java, which is not the case with USB.

Not true - I use 64-bit Java, and USB works just fine.

[s.frings]

Good to read that. Thanks for the correction.

[Davidbrcz]

Hello guys !

I'm a noob with lego NXT but I would like to thank a lot bullestock who saved me from compiling my project under Windows.
I don't know how close are the forum and the website but it might be great to add a link to this topic on that page