Questions tagged [ev3]
EV3 is the 3rd generation of LEGO MINDSTORMS, released in 2013.
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Trouble connecting NXT 2.0 block to Mindstorms Home EV3 software on Mac
My son has finally shown an interest in Mindstorms and we are trying to use an NXT block with my 2015 Macbook Pro (latest OS) running the EV3 Mindstorms home edition software.
I have read in many ...
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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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How to import a .ev3 project file into mindstorm software
My son just built this Rubik's cube solver and I wanted to help him with the software aspect of it. Despite being a pretty big computer geek, I'm stumped!
The software instructions say to download the ...
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Every time Robot is launched (without changing the code) it is not following the exact path
I'm working on FLL mission and every time our team launches the robot (without changing the program, and we are making sure that it is starting from same location every time) it is not following the ...
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What is the difference between LOCAL memory for programs and LOCAL memory for Direct Commands?
I've learned a bit about Direct Commands in EV3 and understood the work of Local and Global memory. Using the Direct Commands I can access the memory using an offset of the accessing byte/bytes (like ...
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Export LEGO MINDSTORMS EV3 Lab Code
I was wondering if it was possible in any way to see the actual code that is generated by the Lego Mindstorms IDE.
I know there isn't a direct 'export to code' option within the tool but I wondered ...
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EV3 screen stuck at starting after inserting MicroSD card
I followed the official guide to download microPython and flash it onto an empty MicroSD card (SanDisk Extreme Pro 32GB), but the EV3 screen is now stuck at "Starting" after I insert the MicroSD card. ...
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Problem with emulating EV3 brick via wifi
I'm trying to emulate Lego EV3 brick connection via wifi. First I found the repo and rewrote it a bit in C# so now I have this:
LabVIEW.cs
public class LabVIEW
{
public string Serial { get; set; }
...
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Direct command to set EV3 motor speed
I am trying to set a EV3 motor's speed and start it remotely using a direct command. Using the resources LEGO MINDSTORMS EV3 Communication Developer Kit (page 24) and LEGO MINDSTORMS EV3 Firmware ...
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How do I export LEGO Mindstorms programs on the Chromebook
There is now a Chromebook app to program LEGO Mindstorms. I have multiple kids collaborating on programs for FIRST LEGO League. Can they share the program between their Chromebooks? I don't see a ...
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How can I export EV3 Classroom app project on Android tablet version of the app?
I need to submit EV3 code to enter a coding competition. The program is written in the EV3 Classroom app on a Samsung Android tablet. I tried to look for the file with .lmsp extension but cannot find ...
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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 ...
CommunityBot
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Lego Mindstorms EV3 broken screen cable
While taking apart my EV3 brick I accidently pulled on the ribbon cable connecting the screen to the motherboard too hard and it broke.
I figured I could just get a replacement fpc ribbon cable with ...
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How to fix torn EV3 LCD Cable [duplicate]
I accidentally tore my lego EV3's LCD ribbon cable while opening it.
I found this post of someone a while back having the same issue, however as my tear is smaller I was wondering if it was possible ...
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Is the EV3 brick balanced? [closed]
Where is the center of gravity located on the ev3 brick? Is it at the center of volume, or is it off?
Please note, I do not yet own an EV3 so I can't measure it myself.
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EV3 gyroscope drifts when brick is still - what can be done?
The gyroscope value continuously increases/decreases, even when the brick is not rotating! What could be done in order to avoid, mitigate or at least reduce the impact of this behaviour?
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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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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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EV3 education brick doesn't work as is should
I have the EV3 education kit.
When I create a program and upload it to the brick and run it, the first time it runs very well and the robot goes in a straight line, then makes a 90 degree turn. But ...
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My EV3 program will not run despite clicking on the program from the brick
This is a new EV3 Education Core Set. I have made a simple move forward command using the Lego Mindstorm EV3 Students Edition and downloaded it into the EV3 brick. However when I press the program in ...
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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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EV3 Education does not recognize NXT ultrasonic sensor
How do I get the NXT ultrasonic sensor to work in the Education EV3 Classroom application?
OK: I have connected a NXT ultrasonic sensor to the input port 1 of an EV3 control brick.
OK: For testing, ...
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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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Is it possible to have a motor default to a certain position at the start of the code? I'm trying to use the motor as a servo, and it's annoying
The motor is attached to a "door", which rotates to block off an opening. I have it coded to manually go back 1/4 of a rotation, and the distance sensor attached will send it forwards 1/4 of ...
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EV3 with 6 motors
My son has made a crane with 6 EV3 motors connected to an EV3 hub. He's used ports A,B,C,D and 1,2.
But two of them don't work. Are ports 1-4 just data ports for sensors, not motors?
Is 4 the maximum ...
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How to install Firmware 1.10E on an EV3 home/retail edition brick
If and how can you install firmware 1.10E on an EV3 brick from an home/retail edition set (instead of an education set)? Updates 1.0E9 are only recognized from the Mindstorm software, also with ...
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Is there a free EV3 simulator (virtual machine) for the Mac OS?
I recently saw this question on a virtual EV3 machine. From the video, I felt that this software will be great. However, I don't have the budget needed to buy a licence. Is there any alternative to ...
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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 Device Manager ghost on my mac - how to remove?
TLDR: how to remove EV3 software completely from Mac?
A year ago I got a used Mindstorms EV3 set, fired it up and played around with my son who was 8 at the time. I installed a setup where we could ...
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How do I erase all old programs using the new scratch type Education software?
I have 24 Lego Mindstorms EV3 bricks that have old programs and the bricks are named. I want to erase them so they can be used for new students. In the older Mindstorms software I would just reinstall ...
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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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"Heads up! Could not open project" error message in EV3 software [duplicate]
Whenever we try to edit one of our old projects our EV3 Mindstorms Home software shows us the "Heads up! Could not open project" screen. What should we do?
I am on the Mac OS Big Sur 11.2.3 ...
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Is it possible to control the EV3 brick with a GUI on PC? If so hows the best way to go about it
I've been interested in controlling a machine remotely through a GUI and I am stuck in between picking Python or Java to do this project in but I also think the way I'm going about this would be all ...
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Accessing an EV3 brick on computer without MINDSTORMS Home
I am trying to hack my EV3, and I know I can make it execute commands I send via USB thanks to the communication developer kit.
When I connect it via USB, it is only visible by the MINSTORMS Home app ...
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EV3 Home Shuts down after 2 min. (lights orange, and 3 Icons Triangle, Gage, Manual)
I just purchased a second hand LEGO Mindstorms Home EV3.
The brick turns on, allows firmware update, etc. However, after about 2 minutes the unit makes a noise, LED's turn red, and 3 icons appear.
...
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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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Camera for Spike or Mindstorms for Streaming
I have made a few EV3/Spike robots that can be controlled remotely. They are controlled by either a PS4 controller or using a dashboard I built on a website. I'm running Python on the LEGO. However, ...
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Multiple Programming Blocks Running at Same Time
My team created a simple program to drive robot out. It consists of a MyBlock to drive straight a specified distance and speed utilizing the Gyro sensor. The program then activates a third large ...
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When using Mindstorms Scratch-like development tool for EV3, is it possible to move a single or a few selected blocks somehow?
Say I have 10 random blocks in a line.
Is it possible to move number 4 to position 1 without also moving block 5-10?
As far as I have managed to move blocks all following blocks also gets moved even ...
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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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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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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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Connected EV3 bricks don't react (EV3 Classroom)
I have a big robot that needs four big motors to drive it and two small motors for other functions -> I need two bricks to communicate with each other because they need to use the same sensors.
I ...
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2 Questions, 1: LDD V4.3.12 not connecting to internet 2: I can't find any EV3 electric parts [duplicate]
(I'm new to LDD)
Hi, I'm trying to use LDD for designing a robot for my Lego Robotics Class. It's just whenever I launch LDD, it just keeps saying that I'm not connected to internet and asking if I ...
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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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EV3 brick freeze during run big program
EV3 brick sometimes freezes while executing huge programs and do not react on buttons and bluetooth (connect, start/stop program). Only way to continue work is hard reset.
We discovered that freeze ...
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Stuck on "Installing rootfs" when installing leJOS on the brick
When following the instructions for creating an SD card with leJOS, the brick freezes when it comes to the screen “Installing rootfs.” I'm using a new 32 GB SanDisk SD card. I've confirmed that I'm ...
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Why do I not have the Brick Datalog app in the LEGO Mindstorms EV3 V1.10E firmware?
I realize a similar question has been asked (you can view it here) however mine is slightly different.
I have a Lego Mindstorms EV3 Home Set 31313 and due to recommendation, I installed Lego ...
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Is it possible to use 5 motors on an EV3 brick?
The EV3 brick has only four output ports (A B C & D) to run motors. Is there any way to use port 1 (sensor port) to control a motor?
