Questions tagged [ev3]

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

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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 steering mechanism and how to make a remote-...
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Lego Mindstorms EV3 software being detected as Ransomware

While I was programming my EV3 robot on my Windows 10, the Lego Mindstorms software immediately closed, and then Bitdefender Antivirus said that it was some sort of Ransomware. It was Bitdefender that ...
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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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Confusion with error symbol and coding

I am making a colour sorter robot. However, when I'm trying to detect colour with the colour sensor it displays an error message. The error symbols look like ev3 programming blocks and then an ...
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1answer
72 views

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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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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1answer
87 views

Current LEGO Digital Designer download is missing a lot of parts [duplicate]

The current LDD download is missing a lot of bricks that were in version 1.3.11 before. Such as, but not limited to: EV3 motors, sensors and the main EV3 brick. Does anyone have a solution/download ...
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How to use Myblock parameters on EV3? [closed]

How do I use them? What do they do? How do they work? I have no idea, and would like some information on them. Thanks.
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46 views

Is it possible to use a switch with three conditionals and the color sensor to compare?

I am using an EV3 robot. Is there a way to program it using a switch, or another way, to compare multiple colors? The goal is to have the robot act as a car and use the color sensor to recognize ...
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1answer
39 views

EV3 program runs fine when connected to PC but does not respond when copied to the brick

I am building the race car mentioned in the LEGO Mindstorms discovery book using an EV3 brick. The problem I am facing is that the driving program runs fine when the brick is connected to the PC via ...
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How can I upload .ev3 files to my brick under macOS Catalina

After updating my Mac to macOS Catalina I can no longer run the previous Mindstorms software. The new tool "Mindstorms Home" doesn't allow for opening .ev3 files and uploading them to the brick. Does ...
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128 views

Is the LEGO Mindstorms Education (not Home, not Scratch based) Edition for Mac OS gone?

I am starting a robotics and programming club with some 9-12 year olds and for the past week I have been developing activities using my Windows version of LEGO Mindstorms (the education / teacher ...
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66 views

My Mindstorms Spik3r can't turn around

When I use the button for turning it just goes backwards. Why does this happen? I've checked the instructions and didn't find anything.
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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 counter clockwise to one another (if one plays ...
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1answer
54 views

EV3 software with large blocks

I can't seem to find a download for home or education version of EV3 software that has the large white blocks for either macos 10.13 or 10.15 on my imac. Can someone help? I currently have that ...
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Recover lost programs from EV3 brick [duplicate]

I saved all my Mindstorms EV3 programs in a pendrive,but now,the the pendrive has broken, so I lost all of my programs. But I have all programs inthe EV3 brick. Does someone know if I can recover my ...
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59 views

How to restart/reset a program automatically after stop block

I have a program that uses the colour sensor to progress that program. The colours are in a certain order. If the wrong colour is detected, the program stops. I want to restart the program from the ...
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111 views

EV3 color sensor strangeness

I've run across something very strange with my color sensor when using multiple sensors and multiple nested loops for a sumobot. I have 4 separate loops continuously monitoring the "optical", "...
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67 views

LEGO EV3 Ultrasonic sensor missing from Home Edition programmer [duplicate]

I'll get straight to the point: When I open my LEGO MINDSTORMS EV3 Home Edition programmer and try to use an ultrasonic sensor, there is no option for it in any blocks. I don't even see any allusion ...
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1answer
52 views

How to make Spik3r move without the pincers moving

How do you make Spik3r move without the pincers moving as well? Seems like the legs are only controlled by the motor on port B, but the move tank and steer modules only allow for the use of 2 ports. ...
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1answer
42 views

Chromebook troubles?

I want to make a crane in LEGO Mindstorms EV3 and I've already downloaded the software but as you can see below some coding pieces here are not in the chromebook version. Should I download the ...
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74 views

Mindstorms EV3 unable to drive two motors simultaneously

Yesterday I had the basic driving robot with two large motors, but I could not get both motors running at the same time. I had the tank control programming block, with both motors set to 50% and when ...
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66 views

Port problem? Mindstorms EV3 brick doesn't detect sensor blocks

I've just bought a second hand Mindstorms EV3 home edition set but the ports aren't detecting any of the sensors just the motors. When checking the ports on the EV3 brick it says "none". I've updated ...
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Is it possible to use EV3 MicroPython with Windows 7?

I have been trying to get python on my EV3 brick using an EV3 MicroPython SD card image as described on the Lego website. The EV3 brick seem fine with its new OS. Instead my problems are at the ...
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86 views

What is the use of a single ultrasonic signal?

The EV3 ultrasonic sensor has an advanced mode that includes an option to use single or continuous sensing as described in the Help page: You can choose whether the sensor sends a single ultrasonic ...
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59 views

Advanced mode in EV3 ultrasonic sensor

The EV3 Ultrasonic Sensor has an “Advanced mode" which measures either in centimeters or in inches. When exactly do you use this mode? Why doesn’t the sensor send just a single ultrasonic signal?
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224 views

Is the EV3RSTORM from Lego Mindstorms programmable using a real programming language? [duplicate]

I'm a software developer and Lego fan. I'll create a robot with Lego Mindstorms, but I'll like to know that the is EV3RSTORM is programable using a real programming language (Python, C#, JavaScript, ...
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79 views

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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136 views

Is there a way to convert .ev3 files to .uf2 files?

I am using Lego Mindstorms EV3 Education Edition and I am wondering if there is a way to convert the default .ev3 files to .uf2 files
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1answer
79 views

Can you change the sensitivity of an EV3 Touch Sensor?

My son is making a LEGO pinball machine and is wondering if it is possible to increase the sensitivity of an Ev3 Touch Sensor as when a ball hits it? Or does he need to use Color Sensors?
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357 views

Does LEGO no longer support NXT 2.0 at all?

I am running Mac OS X 10.15 (Catalina) and the EV3 software can't detect my NXT 2.0 using USB.
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62 views

Is it possible to use multiple IR beacons on different channels to control EV3?

One IR beacon has very few buttons and I would like to buy additional beacons and use them simultaneously to be able to control more channels. I can't find any information if this setup will work. ...
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38 views

Can the EV3 software program switch block take inputs?

Is it possible to input values into a switch block? For example, if I have a move steering block in switch statement, can I input a value for power from a math block outside the switch statement? If I ...
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Release date for New LEGO® MINDSTORMS® Education EV3 Classroom? [duplicate]

What is the release date for LEGO® MINDSTORMS® Education EV3 Classroom for New macOS (macOS 10.15 Catalina)?
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When the Chromebook crashes after coding the color sensor switch, what can I offer students to do for troubleshoot this consistent problem?

When students use the switcher block to program the color sensor on their Chromebooks, the app crashes. We have all accessibilities turned off and ChromeOS updated. What other troubleshooting steps ...
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67 views

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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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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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 ...
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1answer
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EV3-specific bricks missing from Lego Digital Designer 4.3.11 (Win)?

I have LDD on my Mac and have used it to create EV3 models (like an FLL robot, or a Lego dot-matrix printer). Recently, I purchased a cheap Windows laptop for use by a FLL team. After twice ...
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256 views

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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1answer
54 views

Unable to change program name in EV3 IDE

My students are having a weird problem in the EV3 IDE. When we try to change the program name, in the IDE, the name reverts to program. As an example, if the student is creating several programs, ...
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278 views

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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1answer
89 views

How to distinguish between objects using a sonic sensor?

I am trying to find a ball in the field, grab it, and drop in the specified area. I'm using an ultrasonic sensor on the front of the robot. My current solution for locating the ball is: Turn ...
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1answer
201 views

EV3 PID line follower with medium motors

I am stuck on creating an efficient line follower with medium motors. The problem is that the motors are rotating in different ways so I can't use the steering block. I would appreciate any kind of ...
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T-R3X the look My Block problems [duplicate]

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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1answer
124 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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150 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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151 views

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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