Questions tagged [ev3]

EV3 is the current generation of LEGO MINDSTORMS, released in 2013.

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System.ArgumentException: Only Sequence Wires can be snapped

I try to open an project on last version of LEGO Mindstorm EV3 Home Edition, but the system shows the next error message 'An unexcpected error has ocurred. Please restart LEGO MINDSTORM EV3.' After ...
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151 views

Does anyone here know how to apply for MFi product plan id to LEGO?

Does anyone here have an idea as to how to apply to LEGO to get MFi product plan id? Or how do I get to their MFi product plan form?
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How do I rename an EV3 project?

I can rename the program in the Home Edition software but I just can't rename a project. Please tell me how to do it. Thanks!
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3answers
2k views

PC control Ev3 robot

I wanted to see if I could control my robot with a PC and I wanted to know if there was a way to do it. I have already searched for a controller for the PC and didn't find anything.
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4answers
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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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EV3 and HiTechnic Color Sensor Block

Can I use the Hitechnic Color Sensor with my EV3? At the HiTechnic web site I cannot find the necessary files for importing the Hitechnic Color Sensor Block into the EV3 software.
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LEGO Mindstorm EV3 Line-With-Gaps Follower? [Robotc]

Trying to create an algorithm / code in order to get my robot to follow a track which it currently can do, using a color sensor and following the inside edge. So I'm wondering how to transition to the ...
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2answers
65 views

Buy the complete EV3 set or only the brick?

I have an old NXT (or NXT 2.0, do not remember exactly) bought I think in 2007. I would like to upgrade to EV3, but I am not sure if I should buy the complete set or only the central brick. Is there ...
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lego mindstorm ev3 education 1.4.2 for Windows crash when open 2nd projects

EV3 open first project no problem, but when I open second project it crash and exit. I tryed install EV3 software on Windows 10 (MS Surface laptop i7,16GB RAM), or on Windows 7 (Thinpad i5, 16GB RAM), ...
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546 views

Mindstorms EV3 Spinner factory complete code problem

I recently posted a question about the creation of My Block. Now I have another problem. I have written the code as described in the program description, and double checked it, but it still doesn't ...
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1answer
131 views

Help with Multiple Motors/ Intelligent Bricks and coding/ programming/ daisy chaining

Built the accompanying robot earlier in the week. I have a challenge where the robot needs to find white/ black bricks then store them on a tray and then travel over to another robot and transfer the ...
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EV3 touch sensor specs relevant for a brick-built MOC

I want to integrate the following EV3 touch sensors (45507) into a MOC: For aesthetical reasons, I want the MOC to be mainly built out of system bricks and plates, with only some internal stuff in ...
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Mindstorms program - myblocks that work fine when run individually but when executed as part of a larger program, break

We have a line following myblock, which follows the line perfectly if it runs alone. However, if we include it as a block as part of a larger program, it goes haywire when it gets to that step and ...
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511 views

Does the Lego Mindstorms EV3 software work on macOS High Sierra?

Will there be issues with the software, or will it work properly on macOS High Sierra? My Mac: Retina MacBook Pro 13", Early 2015
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2answers
142 views

Programming to get data

I am using EV3 with Linux V1.09 and I am doing a project in which I want to send the sensor data from the EV3 to a remote web server using POST method - is this possible?
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476 views

Installed EV3 software on Win 8 and it won't load

EV3 software used to work on my laptop. Now it does not load any more. When I double click on the LEGO Mindstorms icon. It starts the procedure of loading the software. Then it stuck there and won'...
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109 views

EV3 program refuses to work

I downloaded a 67KB program into my EV3 block. However, the program refuses to work. The EV3 says "Main", the name of my program, but it does not respond otherwise. What is the problem, and how do I ...
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982 views

How to parameter the ports in move tank block EV3?

How do I parameter the ports at Move Tank block (in My Block)?
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Color Sensor/hi-tech and EV3

I want to create a line follower by EV3 using hi-tech color sensor without using switch! :( I tried some former ways but the robot cannot follow the line very well! can anyone guide me?
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446 views

Can i change the way the ir remote works?

I bought an EV3 and the first thing that I want to do with it is control models with the remote. I finally discovered how to do this after a long search. It can control the Formula EV3 racing car ...
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T-R3X the look My Block problems

OK I am making the look My block for the T-R3X program but there is this block which don't know how to make at the end of the diagram in the book.
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30 views

How to make ev3 follow moving object with ultrasonic sensor [closed]

I have an EV3 and am part of a sumo tournament. We want to make it follow the other robots, but am not sure how
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0answers
29 views

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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changing ev3p file back into an ev3 project file

how do I change an ev3p file into an ev3 project file. Everytime that I click on the ev3p file to open it, it turns up as text in notepad.
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36 views

What does this error symbol on the EV3 mean?

I get this error image pop up when I power on my EV3. What does it mean? Also, is there a list of different error codes anywhere, I looked in the User Manual and I could not see anything. Cheers!
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The HiTechnic Color sensor is not detected in the port view in lab view

When I inserted the HiTechnic Color Sensor Block into the Ev3, the Ev3 detected the color sensor. But in my Mindstorms lab view, the HiTechnic color sensor does not appear on the port control. Can ...
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1answer
32 views

Is there a way to restart a program with EV3?

I've got a program with a code lock, and I would like the program to restart when you enter the incorrect code. Does anyone know of a way to do that?
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1answer
89 views

Run Code From PC

https://www.ev3dev.org/projects/2014/05/09/Python-Rubiks-Cube-Solver/ The other one gives a solution in around 20 steps, but takes around 500 MB of memory, so I need to run it on a computer How do I ...
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38 views

EV3 Brick is Stuck on Red

The EV3 brick started by flashing red. Then started where it is stuck on two red buttons. Have changed batteries, and manual reset with no change.
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Using switch block with Hitechnic color block

Can I compare the Hitechnic block --> measure --> color output in a switch block? For example, if the Hitechnic color sensor is seeing black, then do something, else do another thing. If not, then how ...
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46 views

EV3 Spinner factory not moving in the right order

We've built a spinner factory going by the original instructions in the Lego Mindstorms EV3 Education Software, and downloaded the program for it onto the bricks, the Spinner factory moves around, the ...
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2answers
195 views

Is EV3 Device Manager still active?

Link to https://ev3manager.education.lego.com/ is broken - will this be fixed?
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182 views

Bricx Command Center says “No connection to the programmable brick”

I saw that Laurens Valk in THE LEGO® MINDSTORMS® EV3 DISCOVERY BOOK thanks John Hansen for the EV3 screen capture tool, and, upon further investigation, I found and installed Bricx Command ...
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2answers
937 views

How to make a Lego Mindstorms ev3 self driving car?

I recently got the Lego Mindstorms EV3 kit. I wanted to make a self driving car, but I got stuck on the building part. I saw another question like this, however it was for NXT and had no decent ...
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362 views

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. The program has 2 main loops, titled "touch" and "end" with two more nested in the "touch" ...
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249 views

EV3 low battery communicate right after startup

I just bought EV3 and started having battery problems. I am using 6 NiMH 1.5V batteries for my EV3. They lasted for around 10 minutes of work and went flat (that's what EV3 kept saying but the ...
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1answer
189 views

Ev3 won't run certain loop

I'm trying to make a program where an ev3 is IR controlled but if button 9 (toggle) is pressed it goes in autonomous mode, however, my ev3 will not run a certain loop in the program. It looks like ...
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1answer
1k views

Moving the motor to certain initial position [duplicate]

I was assisting my child in EV3 missions, specifically, the 3rd mission of TRACK3R, the one where the robot has to grab two tires and put them elsewhere. The mission requires to manipulate the Medium ...
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67 views

How do you get LEGO Education EV3 Software? [duplicate]

Does anyone know how to get it? I have a rough feeling that you get it by purchasing the product? Please help.