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Connecting robots

This category contains 10 posts

Line Following & Cooperating Robots (part 1)

Following on from the series of articles about EV3 to EV3 communications I wanted to build some actual robots and have them cooperate, but I wanted to keep things simple and avoid the complexities of navigation and dealing with the environment as much as possible. I wanted to be able to concentrate on the cooperation side … Continue reading

EV3 to EV3: Running text. Take two!

In the previous article we saw how things don’t always go to plan when trying to put together demos. In this post I want to describe an alternative approach to the same problem (creating a running text display over linked EV3s) that works. The standard leJOS remote API basically provides a way to access the … Continue reading

EV3 to EV3: Running text. Sometimes things don’t work!

  When I first started planning this series I wanted some easy to describe simple examples of using multiple EV3s together to demonstrate the various leJOS APIs. One of the first examples I came up with was that of a running text display. I wanted to place the EV3s next to each other and have … Continue reading

PAN, the leJOS answer to daisy chaining

Andy wrote a series of articles about connecting multiple EV3’s and how to get them to work in a coordinated way. This exciting new feature will become available in the next (post 0.9.0-beta) release of leJOS. Make sure you are prepared, read the articles and start saving for your next EV3. Continue reading

EV3 to EV3: Motor control

In the previous article we saw how leJOS can be used to control the LEDs on remote EV3s, but what about motors? Can the same technique be used for those? Let’s take a look. Like before we are using 4 EV3s all connected together in a PAN using Bluetooth, this time each EV3 has two … Continue reading

EV3 to EV3: Using remote methods

In previous posts we have looked at how we can connect multiple EV3s together into a PAN (Personal Area Network), in this article we will see how we can use the PAN to allow us to write a simple program to control the resources of one EV3 from another. There are several ways to create this … Continue reading

PAN Performance

In this article we will take a look at how well connections made via the PAN work and see how Bluetooth, USB and WiFi compare. The test setup makes use of 4 EV3s (thanks to the LEGO folks for making this possible), plus a PC. One of the EV3s is configured as an access point, … Continue reading

PAN Configuration

In this second article on the new communication modes available in leJOS I want to take a look at the configuration options provided by the updated menu. Let’s start by configuring an EV3 as an access point (which is the default configuration).          The first image shows the new menu item used to … Continue reading

New communication modes allow your EV3s to talk

Pretty much from the first release of leJOS you have been able to connect to the EV3 using WiFi, Bluetooth and USB connections. What has not been so easy is using Bluetooth and USB to connect two or more EV3s together. Some recent work on leJOS (post the 0.9.0 release) aims to make this much … Continue reading

Comparing WiFi Adapters

leJOS has always allowed you to use WiFi adapters other then the original Lego supported Netgear device. In the post 0.9.0 release of leJOS we have improved things further updating drivers and adding new ones. This means there is now an even wider choice of devices. In this article I compare 5 nano adapters against the … Continue reading

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