Questions tagged [ev3dev]

A Debian Linux distribution that runs on LEGO MINDSTORMS EV3. Visit http://www.ev3dev.org for more information.

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How to cross compile for ev3dev using Docker

How to add ev3dev libraries/headers to docker cross-compile setup? I have assembled ev3dev on BrickPi (with Raspberry Pi 1 - chip BCM2835). I think, it all should be pretty similar for EV3 brick too. ...
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2 votes
2 answers
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"Heads up! Could not open project" error message when opening project

When I try to open my project it gives me error saying "Heads up! Could not open project". Could you please help me? Let me know if you want me to share the file. We were working on that ...
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1 vote
1 answer
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EV3Dev Gyro sensor doesn't output values beneath 0

So, basically, my problem is that my Ev3 Gyro Sensor clamps outputs beneath 0 to 0. If I were to rotate my robot clockwise, the gyro rotation would go up, but when I rotate my robot counter-clockwise, ...
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3 votes
1 answer
281 views

Why does Pybricks on ev3dev have slow performance compared to EV3-G?

I got MINDSTORMS EV3 for my son and me. We installed Python (ev3dev) and ii seems to be running very slowly. I tried setting up the classic LEGO ev3g (block code), and that seems to run fine. Are we ...
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1 vote
1 answer
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Why is my EV3 status light pulsing? (ev3dev)

I am using EV3 micropython (ev3dev?). When I upload the below program to my EV3, I see on the screen the usual play button image which looks approximately like the below ASCII art: ...
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0 votes
1 answer
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Detect distances over 255cm with EV3 ultrasonic sensor?

In my use case, I have to detect things about 3-4 meters. I don't need to be accurate, +-2 or 3cm is enough. The EV3-G and most other places have a max distance of 255cm, which I understand that it is ...
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  • 191
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2 answers
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Port Splitter for EV3 motors

I have searched all over the internet for EV3 port splitters for motors. I have got 4 large motors and 2 medium motors and I do not have enough motor ports for them all. I can usually only find sensor ...
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2 votes
1 answer
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how to send direct command to ev3 brick

I am new to ev3 python but am working on a project. I was reading about NXT-python that " It works by sending the direct commands detailed in LEGO's "Blue-tooth Development Kit" to the NXT brick" I ...
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3 votes
1 answer
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Anyone have the control block for the hitechnic color sensors?

I'm just wondering if anyone has a copy of the control block for the hitechnic color sensor v2? I'll take a v1 if you have that because I'm desperate at this point. The downloads page for it is down ...
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8 votes
2 answers
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Capture video stream from LEGO Studio Camera (Logitech USB webcam) in ev3dev?

Once upon a time, LEGO made a digital camera for the LEGO Studios and Mindstorms line. Internally it's an old USB Logitech camera repackaged in a LEGO housing. It could also be used with the old LEGO ...
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3 votes
2 answers
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How to instruct Mindstorms EV3 from PC conditionally?

I want to direct my LEGO Mindstorms EV3 creature from my PC conditionally (ev3dev, Python). The idea is that the program runs on the computer, collects real-time data from different sources, processes ...
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Lego Mindstorms EV3: programming language recommendation

I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors and in the future also a camera for line tracking. Currently I construct my programs using the ...
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  • 211
6 votes
2 answers
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How to connect two LEGO Bricks EV3 by USB using python

For some project, I have to use 7 motors with ev3 bricks. So I would like to connect 2 bricks using USB-USB link, and make them communicate, in python. But I don't know how to do that, I've tried ...
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4 votes
1 answer
2k views

How to get double the speed from 2 regulated EV3 motors?

So I've noticed that if I connect two EV3 motors to one another (with gears), I still get exactly the same maximum speed as if I had a single motor. So, my question: how can I get twice the power/...
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2 votes
1 answer
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Controlling EV3 motors within VC++

I've got an application within some VC++ software (BCI2000). This is running on Windows 7. Although BCI2000 can run elsewhere, I'd like to stay on Windows. I've got an EV3 whose motors I'd like to ...
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  • 155
6 votes
1 answer
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Slow down the mindstorms EV3 motor so target position is not overshot

I have Debian jesse installed on a mindstorms EV3 and I'm using the ev3.lego library: https://github.com/topikachu/python-ev3 I want to be able to slow down the motor as it reaches its target ...
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2 votes
1 answer
286 views

How do I make use of the full SD-card after installing ev3dev

After writing the image to the 8G microSD-card, initial setup of network and installation of git (with apt-get) I could not install anything else since I was out of diskspace. This confused me. But df ...
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  • 568
3 votes
1 answer
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How to enter wifi-password on ev3dev?

After successfully installing ev3dev and getting the USB connection working I now want to get my wifi-dongle working (or rather connecting). The dongle is successfully found and my LAN is displayed. ...
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  • 568
8 votes
3 answers
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Is there a microphone that works with Mindstorms EV3?

I'm planning to program my EV3 robot to do voice chat over VOIP using ev3dev and a Debian program. Is this possible? Are there microphones known to work with EV3, and has anyone had experience using ...
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