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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

Webcam HTTP streaming

To follow up my post on webcam streaming, here is an example of HTTP MJPG streaming. This allows you to open the stream in a browser using a URL like However, Chrome does not let you open this directly – it must be embedded in an HTML document, e.g.: Here is the EV3 code, … 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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