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by esmetaman
Sun May 20, 2018 4:51 pm
Forum: EV3 Software
Topic: Should I use Debian or Ubuntu linux?
Replies: 3
Views: 45

Re: Should I use Debian or Ubuntu linux?

I have just tested that it is possible to manage multiple webcams with EV3 and it is true. In the example, I manage 3 webcams to store in disk some frames. It is a simple image but it is a good way to understand the concept. You plug the new webcam in the USB 2.0 hub and the OS will detect the webca...
by esmetaman
Sat May 19, 2018 6:39 pm
Forum: EV3 Software
Topic: Algorithm like a Vacuum Cleaning Robot
Replies: 3
Views: 340

Re: Algorithm like a Vacuum Cleaning Robot

Last year, I found the following strategies: - Left Right Sweep - Follow Right Wall - Closest to Robot - Closest to Start - Assume No Wall - Assume Walls - No Walls if Visited - Find closest Unvisited Cell - Find Closest Unvisited Cell to Start Related issue: https://github.com/ev3dev-lang-java/ev3d...
by esmetaman
Sun May 13, 2018 9:04 am
Forum: EV3 Software
Topic: Should I use Debian or Ubuntu linux?
Replies: 3
Views: 45

Re: Should I use Debian or Ubuntu linux?

Hi @clplaneguy, image processing is a heavy task for a EV3 Brick because the CPU/RAM specifications are very limited for that kind of tasks. If you add 2 cameras, the CPU load is double. You don´t need to switch to Ubuntu Linux to Debian, let me clarify some concepts about the JVM architecture: Ever...
by esmetaman
Wed May 02, 2018 8:52 am
Forum: EV3 Software
Topic: How to run a leJOS Projekt on ev3dev
Replies: 2
Views: 58

Re: How to run a leJOS Projekt on ev3dev

Good morning @Mauskrieger, It is pretty interesting if you are using BlueJ with the project. The another approach that exist is this Template project. https://github.com/ev3dev-lang-java/template_project_gradle Template project offer a Ready to run project based on Gradle with some extra Gradle Task...
by esmetaman
Tue Apr 24, 2018 12:07 am
Forum: EV3 Software
Topic: Can leJOS run on ev3dev?
Replies: 34
Views: 7400

Re: Can leJOS run on ev3dev?

ev3dev-lang-java 2.3.0 is out: - OpenJDK 10 for EV3 Brick - Automatic Java install for EV3 Brick - Debian Stretch Support - LEGO EV3 Sensor performance improvement - USB GPS Support - Unit Testing support Debian Stretch Snapshot: https://oss.jfrog.org/list/oss-snapshot-local/org/ev3dev/brickstrap/20...
by esmetaman
Sat Apr 21, 2018 9:48 am
Forum: EV3 Software
Topic: How do I update OpenCV 2.4.11?
Replies: 6
Views: 87

Re: How do I update OpenCV 2.4.11?

It is not necessary to move to Python to use a latest OpenCV version.

Take a look this Debian package:
https://packages.debian.org/search?suit ... pencv+java
https://packages.debian.org/buster/libopencv3.2-java

Juan Antonio
by esmetaman
Tue Apr 03, 2018 8:52 pm
Forum: EV3 Software
Topic: nxtcamV5 line tracing issue
Replies: 3
Views: 84

Re: nxtcamV5 line tracing issue

Hi, Some months ago, I implemented the support for NXTCamV5 for EV3. You have the sources and examples here: https://github.com/ev3dev-lang-java/lejos-support/tree/develop/src/main/java/lejos/hardware/device https://github.com/ev3dev-lang-java/lejos-support/tree/develop/src/main/java/examples/nxtcam...
by esmetaman
Tue Apr 03, 2018 8:43 pm
Forum: EV3 Software
Topic: ev3 Is it possible to play back images and sounds in Lejos?
Replies: 3
Views: 82

Re: ev3 Is it possible to play back images and sounds in Lejos?

Hi, Using this Java library in top of EV3Dev, it is possible. Review this examples: https://github.com/ev3dev-lang-java/examples/tree/master/ev3dev-lang-java/src/main/java/ev3dev/actuators Indeed, this class uses a PNG: https://github.com/ev3dev-lang-java/ev3dev-lang-java/tree/develop/src/main/resou...
by esmetaman
Wed Mar 28, 2018 6:45 am
Forum: EV3 Software
Topic: OpenJDK 10 Support for EV3 Brick
Replies: 0
Views: 86

OpenJDK 10 Support for EV3 Brick

Hi mates, It is available to test and use OpenJDK 10 for EV3 Brick. https://pbs.twimg.com/media/DZWvfESXcAAWeZs.jpg After some iterations with the project, we have a stable repo to build custom JRE for EV3 Brick on top of EV3Dev, a Debian distro. We could follow the JEP 322 and release a new JRE eve...
by esmetaman
Tue Mar 27, 2018 6:29 pm
Forum: EV3 Software
Topic: EV3 + LeJOS + Kotlin + intellij: seeking collaboration
Replies: 1
Views: 135

Re: EV3 + LeJOS + Kotlin + intellij: seeking collaboration

If you like, you can build your examples on Java 9 and soon in Java 10 for EV3 Brick & Brick Pi 3 using the LeJOS port on EV3Dev: https://github.com/ev3dev-lang-java/ev3dev-lang-java Last week, we started the migration to Debian Stretch. Latest stable version is v0.7.0 for Debian Jessie. Cheers ...
by esmetaman
Sat Mar 24, 2018 11:39 pm
Forum: EV3 Software
Topic: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor
Replies: 2
Views: 72

Re: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor

Many thanks Andy for the clarification, I will try to implement both methods using the EV3Dev API: http://docs.ev3dev.org/projects/lego-linux-drivers/en/ev3dev-jessie/sensor_data.html#lego-ev3-us-modes Related issue: https://github.com/ev3dev-lang-java/ev3dev-lang-java/issues/436 Cheers Juan Antonio
by esmetaman
Sat Mar 24, 2018 6:43 pm
Forum: EV3 Software
Topic: What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor
Replies: 2
Views: 72

What is the usecase for the methods: disable and enable on the sensor EV3UltrasonicSensor

Hi Andy, The EV3 Sensor Ultrasonic Sensor has 2 methods: enable & disable: http://www.lejos.org/ev3/docs/lejos/hardware/sensor/EV3UltrasonicSensor.html And I would like to know what is the use case for that methods. Reviewed other EV3Sensors, I didn´t see that methods: http://www.lejos.org/ev3/d...
by esmetaman
Tue Mar 13, 2018 8:04 am
Forum: EV3 Software
Topic: Can leJOS run on ev3dev?
Replies: 34
Views: 7400

Re: Can leJOS run on ev3dev?

For 2018, this issue try to collect all possible suggestion to improve in the project.
https://github.com/ev3dev-lang-java/ev3 ... issues/413

Any comment is welcome.

Juan Antonio

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