EV3 with lejos

This is where you talk about the EV3 software itself, installation issues, and programming talk.

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Teemo130
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EV3 with lejos

Postby Teemo130 » Tue Jan 03, 2017 7:14 pm

Hi,
I would like to use lejos on my EV3 Brick. But it doesn`t work. Could you please tell me what I have done wrong.
The Installation of lejos and Java have I done as follows:
At first I have downloaded at http://www.lejos.org/ the Version leJOS_EV3_0.9.1-beta_win32_setup.exe and
startet it. After that I have downloaded Java SE 8u111 JDK from Oracle and installed this software. Next I
installed lejos with Java SE 8u111 JDK. Everything seems ok.
At the SD Card Creator I have done as follows (micro SD is new, 32Gbyte):
I have downloaded over the link button the EV3 Oracle JRE (Version Oracle Java SE Embedded version 7 Update 60)
and created the micro SD. With the SD I tried to start the Brick but the installation stops at Installing rootfs and
nothing happend anymore ( I waited 2 hours, I tried it serveral times ). Than I tried diverent Version from lejos and
Java but no effect.

Hope you have an idea
Greetings from Germany

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gloomyandy
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Re: EV3 with lejos

Postby gloomyandy » Tue Jan 03, 2017 8:54 pm

Reformat the sd card and try again. If that does not work try a different sd card. Don't get anything fancy. Spend some time looking around the forum. Note that you will need to build your programs targeting Java 7 if you have a Java JRE (and you should have). You may need to install a Java 7 SDK. Again spend some time reading the many threads here about setting things up...
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nav
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Joined: Wed Apr 19, 2017 11:10 am

Re: EV3 with lejos

Postby nav » Wed Apr 19, 2017 11:13 am

I am having the same problem. Did you mange to slove it and how?

Fan
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Posts: 1
Joined: Thu Nov 02, 2017 3:48 pm

Re: EV3 with lejos

Postby Fan » Thu Nov 02, 2017 4:04 pm

Try many time reformatted SD cards (trying 3 different cards), still stop at "installing rootfs"...checked the sd500.img file and click on it , it said" the file corrupted", is this matter? anyone can help? thanks!

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gloomyandy
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Joined: Fri Sep 28, 2007 2:06 pm
Location: UK

Re: EV3 with lejos

Postby gloomyandy » Thu Nov 02, 2017 10:11 pm

What SD cards have you been using? Don't use high speed or high capacity ones. 8Gb is more than enough, slower speed is not a problem. Spend some time looking around the forum there are lots of threads on this. I'm not sure what your comments about sd500.img mean. How have you been trying to use it? Using sd500 is very much a last resort option.
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