Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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EV3 SPIK3R Mission 2 doesn't move
So I was building Spik3r and I thought I got mission 2 completed. Wheels are turning, legs are moving but the robot just does not move.
It looks like the small wheels should be moving the robot but ...
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706
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Daisy chaining EV3 with RobotC
I'm trying to run EV3 programs with RobotC and trying run on EV3 Daisy Chaining. I have three independent EV3 bricks labelled A,B,C.
I want, according to the color reading by the color sensor on ...
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EV3 Port 1 connection issue
Port 1 on one of our EV3s is acting up. The port recognizes a sensor if the sensor is connected when powering up the unit, but if you unplug the sensor and plug it back in, the EV3 no longer ...
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EV3 classroom cannot create New Project
EV3 Classroom V1.5.0
Windows 10
I run a lab of 24 laptops running EV3 Classroom v1.5.0. Over the last week, more and more computers are unable to create new projects and/or open existing projects ...
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Delete projects from Mindstorms EV3 Brick
I am using Lego Mindstorms with https://makecode.mindstorms.com/ and once the projects are downloaded to the brick, I cannot delete them anymore.
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How do I import my programs from makecode (Chromebook) to my EV3 robot
While using makecode I wanted to import my file to my EV3 robot but it says that I have to connect my EV3 robot to my computer and then move the file to the robot. But since I'm on Chromebook I don't ...
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EV3 motor port works in motor control but not in demo mode
I have a new EV3 set and tried running the Demo program on the initial build. Only the left motor turned, so the robot kept going in circles instead of going straight like its supposed to. When I ...
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EV3 Brick and Commander app Bluetooth disconnecting
On iOS on an iPad, we're having an issue with the EV3 Brick and Commander app Bluetooth connection constantly disconnecting. The brick just stops responding, so we turn the brick off to disconnect and ...
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Why can't I install the NXT software on macOS High Sierra?
I just got an Mindstorms EV3 for Christmas, and learned that you can have the NXT communicate with the EV3 in the NXT software. I tried to install the NXT software on my Mac, but all that happens is a ...
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Sending Gcode to LEGO Mindstorms X/Y plotter?
I am building an x/y plotter out of LEGO Mindstorms. I would like it to read an SVG file on the EV3 Brick, convert it to Gcode, and draw the coordinates. How would I go about doing this?
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Can I use EV3 with a TETRIX motor?
What program can I use to control a TETRIX motor through the LEGO EV3? I've heard that RobotC currently cannot be used for this.
Has NI released a Labview version which I can use to control TETRIX ...
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EV3 Rapt3r's head cable interfering with slithering
My Rapt3r is working great, except that the cable that goes from the head to the "Intelligent Brick" physically interferes with the slithering on the side on which it is plugged (port 4).
Physically ...
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How to get Lego Mindstorms EV3 expansion set (45560) programmes in Scratch
I bought recently Mindstorms EV3 expansion set (45560) and found out that the available programs are written in old LabView-style programming language: https://le-www-live-s.legocdn.com/sc/media/files/...
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Lego Mindstorms Software: "Error code: 4"
After updating my EV3 Brick's firmware from V1.09E to V1.10E and reinstalling the Teacher Edition of the Lego Mindstorms EV3 software (even though I'm not a teacher), I decided to recover my Brick's ...
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How do I make a single arm double tap a piano key?
I am trying to make a Lego play piano from ev3, where I have connected two arms to a single motor on either side using Lego elements. Both the arms move counterclockwise to one another (if one plays ...
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How many rotations or degrees do I need to turn my robot?
I have an EV3 Home edition. I have made a tribot. It has two main motors for the wheels and a caster in the back. To complete a full turn in place I need to set the rotations to 2.32 or 835 degrees.
...
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Lego EV3 simulator and programming
I've been searching and testing for hours. There is little information on this subject though. I have some specific requirements for a Lego EV3 simulator and programming environment.
I do not want to ...
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EV3 Home edition for Mac missing import block option
I'm running EV3 HE 1.3.1 on macOS Sierra 10.12.6, and I'm unable to import the ultrasonic sensor.
When I open tools -> import block -> browse, the open button is always disabled, it does not allow me ...
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Is there an leJOS simulator for EV3?
I found this but this seems to be using their own library to control the EV3.
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Bluetooth connection to EV3 from Java on Linux/Android
I would like to connect to my EV3 from PC (and then Android) via Bluetooth.
I was able to connect to NXT with LEGO-MINDSTORMS-MINDdroid which uses direct LCP commands but as far as I know the ...
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How to determine orientation of a EV3 gripper?
I have built the EV3 Gripper using the manual.
I am programming an ev3 brick using ev3dev. I need to determine the angle/direction/orientation of the robot programmatically, before I can issue a ...
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HiTechnic Color Sensor analog
HiTechnic sales support said that HiTechnic color sensor hasn't been manifactured yet. Currently it's out of stock in HiTechnic shop.
Is there any analog of this sensor except NXT/EV3 color sensors?
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What are the steps in installing the EV3 block developer Kit?
I've downloaded the block developer kit. How do I incorporated into my Mindstorms software?
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Unable to turn on the EV3
I just can not turn on the EV3 with the SD card. I only turned on it twice.
The EV3 stops at [-leJOS EV3] UI and does not go to the next step.
I charged the battery, reinstalled the software inside ...
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How do I control one EV3 using another through bluetooth and LabVIEW?
I have LabVIEW 2014 and I'd like to control make one EV3 move forward using another through bluetooth using LabVIEW, and I don't want to have to use the computer as a relay. How do I do this?
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After adding a MyBlock icon to the EV3 palette of MyBlock icons, how can the new icon be associated to an existing MyBlock?
After following the advice given in adding a MyBlock icon to the EV3 palette, can the icon be associated to an existing MyBlock?
Something better than copy/paste the contents of the existing MyBlock ...
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Unable to open port error
Since today, no matter what program that uses sensors I try to run on my EV3 I get the following error:
lejos.hardware.DeviceException: unable to open port
at lejos.internal.ev3.EV3Port.open(...
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Labview Developer mode for EV3 Classroom app
I found a trick to enable labview mode on EV3 Home Edition, however, I cannot find the LEGO Software folder in C:\Program Files (x86) (or C:\Program Files). In fact, I can't even Open file location on ...
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Strange blocks appeared in my program
In my Mindstorms program, I found these strange blocks. They appeared when I sent this program to my other PC on Windows 10, which is more powerful. They don't work and I can't change them. Mindstorms ...
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EV3 menu tabs occasionally vanishing
When I say "EV3 menu tabs," I'm referring to this part:
And sometimes it disappears, just like the title says.
After testing the EV3, I concluded that there are certain circumstances where this ...
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Bluetooth connection between EV3 brick and MacBook Pro fails after 2 seconds
As I was adviced, I searched for same questions before posting mine but although some are similar, I can't make their answer useful for my problem.
I have a Mindstorms EV3 Education brick and a ...
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Could Microsoft MakeCode be an alternative to the EV3 program?
Is it possible to use Microsoft MakeCode for the EV3 as an alternative to the widely used EV3 program by LEGO? What are the benefits and drawbacks?
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How to import file to Mindstorm Programmer?
I got a Mindstorm set a year ago and I stumbled across a build which looked really cool! I finished the building part then I downloaded the program file but I couldn’t import it.
I have a MacBook ...
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Function in EV3 Basic
I have been programming in basic for ~30 years. I want a translation of the following code into EV3 Basic:
function index( x , y )
return x + y * ( maxx , + 1
end function
sub look
for i = 0 ...
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Loop interrupt stops all loops, not just the one designated
I have been using loop interrupts for a while, and not had an issue... until now. And it is driving me nuts.
My program has 2 main loops, titled "touch" and "end" with two more nested in the "touch" ...
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LEGO Mindstorms Spik3r won't move
I built my Spik3r as usual, but it wouldn't run when I tried to program it. I checked the wheels and the legs and everything seemed fine. I even looked back in the instructions, and redid it. It still ...
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LEGO Mindstorms EV3: Camera recommendation for line tracking
I am planning to build an autonomous car in LEGO Mindstorms that will use ultrasonic or infrared sensors for collision avoidance and in the future also a camera for line tracking. I am now wondering ...
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ev3 brick blocked during running a program
I pressed "Run my program" (a simple one), and it is stuck with "mindstorms sound_turn_on" displayed on the screen. The name of my program is sound_turn_on. I am using LabView to program it. Now ...
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EV3 connection problem via USB on Windows 8.1
I am using LEGO EV3 on windows 8.1 eclipse Neon. When I try to launch the class as a LeJos application I get this error.
IP address is /10.0.1.1
Creating the jar file or uploading the program failed
...
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Why does the Gyro Sensor not work correctly in Virtual Robotics Toolkit?
I somehow found out about Virtual Robotics Toolkit and when I did, I decided that it would be great software to use for Lego League. Later in my research, I found that it automatically had the newest ...
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How to receive response from direct_command_reply from EV3 using Python?
I've established and tested a Bluetooth connection (by playing a tone) between EV3 and Mac running Yosemite with Python 2.7.11.
I used file write as in bt.write(tone) in Python to play the tone ...
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Where do you find custom ev3 code blocks?
I've heard of people using custom-made ev3 (code) blocks in the software, but I don't know where to look for them. Can someone post relevant links? Specifically, I am looking for more technical blocks ...
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ev3dev vs lejos - looking for a comprehensive comparison
Did anyone make a good comparison of these two environments?
The most important factors to me are OS booting time, RAM usage, application start-up time,, compatibility with USB devices, and power ...
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Is there any way to unzip an ev3 file into text and xml files?
I would like to access the text file of the project files (.ev3p) to know their structure. But in the Mindstorms software, I couldn't find any way to download the .ev3p files.
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One of EV3 motors doesn't respond in demo program
I just bought the EV3 set and made the "TRACK3R" model. When I run the demo program from LEGO the port B motor does not work - only the port C motor is works. But if I try "Motor ...
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Ev3 classroom 1.5.2.0 not working
When I try to create a new project or open an old project, the program does not work.
We have 10 computers (desktops) with different versions of Windows 10
Stuck on this.
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EV3 brick unable to connect to EV3 Classroom v1.5 app
From Google Translate:
My EV3 brick cannot connect to the EV3 classroom version 1.5 application, nor by cable, bluetooth or wifi. I haven't found a way to update the EV3 Brick from this app. How can I ...
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Infrared Sensor Activation Problems
I tried running my EV3 program that requires an infrared sensor, but it didn't work. I looked at the port view on the app and I saw the infrared sensor. It was connected, the brick recognized it but ...
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Given program for EV3 Race Car doesn't work, but why?
I have successfully built an EV3 Race Car with instructions from a fan-made book made by Laurens Valk. In the book, he tells how to make my blocks for the rack-and-pinion steering and how to make a ...
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Do you need multiple start blocks rather than just multiple wires from one start block?
Using the Chromebook app I cannot have multiple "wires" from the start block to multiple sections of code blocks. I have to use a start block for each section. When I try to drag a wire it only ...
