Comments on: HOWTO Install leJOS 0.8.1 on LEGO Mindstorms EV3

By: Michael

Michael — Sun, 11 Jan 2015 16:37:41 +0000

No problem — I under I have been reading generic Java programming material. And Brian’s new book. I just found your tutorials more helpful.

By: Miguel

Miguel — Sun, 11 Jan 2015 16:33:06 +0000

Sure, I am planning a full leJOS tutorial… unfortunatelly real life got into the way. But I hope to return to work soon.

By: Mike Wareman

Mike Wareman — Sat, 10 Jan 2015 23:44:46 +0000

Used your tutorial to install the new Lejos release — thank you! Are you planning more Java tutorials?

By: Mike Lorang

Mike Lorang — Sun, 21 Dec 2014 12:46:06 +0000

Nevermind I fixed it using the same fix as jos.fran

By: Mike Lorang

Mike Lorang — Sun, 21 Dec 2014 12:42:58 +0000

Hi, thanks for your video, I have a Problem tho with uploading my program to the ev3. It uploads perfectly, but i an exception: Unsupported Class Version Error 52.0. Run it in eclipe with jdk 7.

By: jos.fran

jos.fran — Tue, 16 Dec 2014 20:25:56 +0000

finally i resolved my problem. “project” “properties” “java compiler” and i change the level to 1.7.

By: jos.fran

jos.fran — Tue, 16 Dec 2014 18:42:52 +0000

i used your link for the java jdk 8.u25 and the jre7u60b19 as in your tuto.
perhaps i made a mistake . i’m going to try again

By: Miguel

Miguel — Tue, 16 Dec 2014 12:39:47 +0000

Are you using the same Java version? It really sounds like some kind of incompatible/missconfigured Java problem.

By: jos.fran

jos.fran — Tue, 16 Dec 2014 11:21:32 +0000

Hey !
I’am french and i’ll try to explain my problem.
after run your “hello word” program in my EV3 brick i got an error message on the console EV3 :” java.lang.UnsupportedClassUsers”
i respected your tuto . i used eclipse luna the last version.it’s the only difference with you
i don’t know what to do now ?
thanks for help

By: KMeyer

KMeyer — Fri, 26 Sep 2014 03:27:58 +0000

Miguel,
Can you provide the same details for a Mac side install? Thanks!

By: Plenituz

Plenituz — Sat, 28 Jun 2014 17:28:28 +0000

I have been reading the forum and it looks like the SDcard is “broken” (even though it works fine for other usages) so I have to buy another one which is no big deal, thanks for the tuto !

By: Miguel

Miguel — Sat, 28 Jun 2014 17:13:11 +0000

My advice is remove all partitions on the SD card, using Disk Manager and try it again. Sometimes shit happens. If it still happens drop me a line and we can work how to fix it.

By: Plenituz

Plenituz — Sat, 28 Jun 2014 11:51:53 +0000

Hey ! I tried installing leJOS just like you explained, it looked like it installed correctly (leJOS screen saying installing linux fs …) but when I looked at it after a while it was on the mindstorm screen. However my SD card has been formated like you said with another partition. What did I do wrong ? Thanks

By: Miguel

Miguel — Fri, 27 Jun 2014 14:41:30 +0000

I am on the way :)
Here you have the first part about motor handling… http://thetechnicgear.com/2014/05/tutorial-using-motors-draw-square-mindstorms-ev3-lejos/

By: James

James — Fri, 27 Jun 2014 01:54:18 +0000

Cool! Could you give us more tutorials on how to programming using Lejos? Can’t wait to read them!

By: Draw a Square: Using Motors in leJOS EV3 ← LEGO Reviews & Videos

Draw a Square: Using Motors in leJOS EV3 ← LEGO Reviews & Videos — Fri, 23 May 2014 12:56:34 +0000

[…] if you successfully installed leJOS using the tutorial then your first steps would be to write a program to do something with it and then you will see the […]

By: Miguel

Miguel — Sun, 11 May 2014 21:16:50 +0000

Sure.
Anyway… I really don’t understand the problem. Once you configure the WiFi on the robot and you click on Run As -> leJOS everything goes automatically. Isn’t it?

By: Michael

Michael — Sun, 11 May 2014 20:53:31 +0000

Once the robot is connected through the EV3 Control Center that is all that is needed. When you go to run the program it gets uploaded to the robot. Thank you for getting me started. Would you be interested in a tutorial based on my experience?

By: Michael

Michael — Sun, 11 May 2014 20:29:51 +0000

I found the EV3 Control Center and then figured out how to search and connect to the robot. Next trick is to figure out how to get my program onto the robot. Any help would be greatly appreciated.

By: Michael

Michael — Sat, 10 May 2014 15:29:45 +0000

I have written a program but now having troubles uploading it to the robot. How do I setup Eclipse to use the WiFi to upload the program? I have an IP address from the WiFi.

By: Miguel

Miguel — Fri, 09 May 2014 09:44:10 +0000

Mainly…
1) Create a New Project -> leJOS EV3 Project
2) Add New Class and name like you want, make sure it has static public main method
3) Copy the code on the article
4) Click on class name and Run -> leJOS EV3
5) You should see Hello World on the EV3 Brick.

By: Michael

Michael — Fri, 09 May 2014 02:47:44 +0000

Your tutorial helped me a lot! I now need some help using Eclipse to create a program and the upload it to my robot. I am very new to Java and just learning the basic concepts.