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by lawrie
Mon Nov 16, 2015 5:29 pm
Forum: EV3 Software
Topic: 0.9.1-beta release
Replies: 0
Views: 4098

0.9.1-beta release

The leJOS EV3 0.9.1-beta release is now out - see https://lejosnews.wordpress.com/2015/11/16/the-long-wait/ for details. You can download the release here - http://sourceforge.net/projects/ev3.lejos.p/files/. You should also update the Eclipse plugin to the 0.9.1 version, e.g. by selecting Help then...
by lawrie
Thu Nov 12, 2015 11:43 am
Forum: EV3 Software
Topic: Program Appears to be Fine, But Screen Remains Blank
Replies: 1
Views: 745

Re: Program Appears to be Fine, But Screen Remains Blank

You are using a very old version of leJOS. It would be better to use 0.9.0, or 0.9.1 which will be out in a few days. I tried the program on the latest version of leJOS and it is fine. Perhaps you are missing seeing the text appearing. Try changing the x and y values to put the text in the middle of...
by lawrie
Thu Nov 12, 2015 11:30 am
Forum: EV3 Software
Topic: Best method to send pc instructions
Replies: 1
Views: 658

Re: Best method to send pc instructions

Do you mean the NXT or the EV3? This is the EV3 forum.
by lawrie
Mon Nov 02, 2015 5:49 pm
Forum: EV3 Software
Topic: Connect from Eclipse to EV3 doesn't work
Replies: 14
Views: 6645

Re: Connect from Eclipse to EV3 doesn't work

You don't need Wifi - you can use USB or Bluetooth to upload your program. At the current release, you have to use the IP address, not the name of your EV3 in the leJOS EV3 preferences. the IP address is shown on the menu screen and is usually 10.0.1.1 for USB. The next release of the Eclipse plugin...
by lawrie
Fri Sep 25, 2015 7:56 am
Forum: EV3 Software
Topic: Can I add external jars/libraries to my project?
Replies: 22
Views: 5972

Re: Can I add external jars/libraries to my project?

You can try the Eclipse plugin at http://www.lejos.org/tools/eclipse/plugin/ev3dev/. This finds all the non-leJOS jar files in the Eclipse class path, uploads them to /home/lejos/lib on the EV3, and adds them to the classpath in the program's jar file manifest. It has not been tested much. Currently...
by lawrie
Sun Jul 26, 2015 8:21 pm
Forum: EV3 Projects
Topic: A complete LEGO based production line
Replies: 5
Views: 2433

Re: A complete LEGO based production line

Very impressive!
by lawrie
Mon Jul 13, 2015 3:56 pm
Forum: EV3 Software
Topic: JRE extract error on EV3
Replies: 37
Views: 5426

Re: JRE extract error on EV3

I tried an install with the ejre-7u60-fcs-b19-linux-arm-sflt-headless-07_may_2014.gz file and it worked fine. The files have always just had just the .gz suffix, although the link on the Oracle page says .tar.gz.

Perhaps there is a problem with your SD card. Have you tried reformatting it?
by lawrie
Sun Jul 05, 2015 5:16 pm
Forum: EV3 Software
Topic: Taking pictures with smartphone
Replies: 1
Views: 890

Re: Taking pictures with smartphone

If you want to do something like the video is doing: Most of the work for this would need to be done by the smart phone app. Android is easier as apps are written in Java and its easier to connect to Android apps. The leJOS side would be quite straightforward. You could just set up a serial connecti...
by lawrie
Mon Jun 15, 2015 8:35 am
Forum: EV3 Projects
Topic: Room Mapping using EV3 IR Sensor
Replies: 10
Views: 2749

Re: Room Mapping using EV3 IR Sensor

The IR sensor has a rather short range for this. The EV3 Ultrasonic sensor would work better, but a laser sensor is best - see https://lejosnews.wordpress.com/2015/05 ... ar-sensor/.
by lawrie
Mon Jun 15, 2015 8:32 am
Forum: EV3 Software
Topic: playSample from Android app
Replies: 1
Views: 1211

Re: playSample from Android app

I have this working and will commit this to the git master repository, and it will be in the next release.
by lawrie
Fri Mar 13, 2015 11:02 am
Forum: EV3 Software
Topic: [Question]Using MCL to navigate from random location
Replies: 2
Views: 827

Re: [Question]Using MCL to navigate from random location

I have done some work on MCL and the version in Git master now works a bit but not very reliably. I will write a blog post when I have it running a bit more reliably.
by lawrie
Fri Mar 13, 2015 10:55 am
Forum: EV3 Software
Topic: How can I use a RangeFinder?
Replies: 5
Views: 1328

Re: How can I use a RangeFinder?

I am currently working on the MCL classes, as they have never worked properly on the EV3. I am using the EV3UltrasonicSensor as it has a much longer range than EV3IRSensor. I don't think the IR sensor will be much use fo MCL because of the short range. There is currently confusion over the units tha...
by lawrie
Sat Feb 28, 2015 9:29 am
Forum: EV3 Software
Topic: [Question]Using MCL to navigate from random location
Replies: 2
Views: 827

Re: [Question]Using MCL to navigate from random location

I don't think anyone has got it working on the EV3. I will have a look at it. I really want to improve the MCL algorithms, too.
by lawrie
Sat Feb 21, 2015 2:22 pm
Forum: EV3 Software
Topic: Android transfer message to EV3 via bluetooth
Replies: 17
Views: 5063

Re: Android transfer message to EV3 via bluetooth

The code changed between the NXT and the EV3 mainly because we wanted to get rid of the static methods in the Bluetooth class. The waitForConnection method should probably return a BTConnection so that the cast is not necessary - I will change that for the next release.
by lawrie
Sat Feb 21, 2015 2:12 pm
Forum: EV3 Hardware
Topic: Webcam problem
Replies: 22
Views: 4098

Re: Webcam problem

I am successfully using a TeckNet C016 that I bought some time ago - http://www.amazon.co.uk/gp/product/B000Q3VECE. They are now much cheaper. I have an older model that had a separate connector for the microphone rather than a USB microphone, which I have not tried. It might be that version that eb...

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