Questions tagged [ev3]

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

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161 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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1answer
147 views

Are there any sensors that are capable of measuring audio pitch for EV3?

Are there any sensors that are capable of measuring audio pitch? Or is there an easy solution that a beginner would be able to make work?
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2answers
434 views

Mindstorms EV3: Patrolling a number of rooms - what are my options?

I want my Mindstorms EV3 bot to patrol a number of rooms autonomously on the same track. What are my options? line following, which requires a line and is relatively slow setting a default program ...
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0answers
666 views

Programming NXT ultrasonic sensor with EV3 software [closed]

How can I program the NXT ultrasonic sensor with EV3 software? When I pick the block for the ultrasonic sensor, it tells me it is not compatible.
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1answer
137 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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1answer
4k views

EV3 won't connect through bluetooth anymore

I was using VS2015 (C#) to write simple programs for my EV3 using a bluetooth connection. This was working fine for several days and then suddenly stopped. I can't for the life of me figure out why. ...
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1answer
470 views

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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0answers
145 views

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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0answers
363 views

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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1answer
65 views

Can I get a JSON value from the internet without flashing a custom FW on EV3?

Got an EV3 for X-Mas. My old NXT brick was broken. So now I have a ton of motors and sensors and all. First project I'd like to create a Bitcoin piggy bank which performs some actions when it gets new ...
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1answer
274 views

EV3 Programme won't load to brick

I have installed EV3 on my PC and am trying to load a program into an NXT 1 Brick. When I click the down load button on the EV3 screen the Brick beeps twice and the program does not load. What am I ...
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1k views

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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1answer
5k views

Programming EV3 with NXC

I'm trying to run NXC programs (all run well on NXT) but when trying run it on EV3 I find an error. The download from computer to EV3, runs well but trying to run the program with RUN EV3, I have an ...
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2answers
361 views

Can a EV3 program run simultaneously with the Running Robot commander app?

Is it possible to run the Robot Commander app and a program on the EV3 brick at the same time? If so how would it be accomplished?
3
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2answers
463 views

Mindstorms, black orphaned data wires

I've just copied a loop element, which had a data wire going into it. The internal wires (from the old external data wire) are now black, and I cannot delete them, or re-link them to a new external ...
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1answer
359 views

What files are required to run an ev3 program?

I'm working on a project that aims to help beginning Lego Mindstorms programmers. I'm developing certain "modules" (moving straight, making a turn) for students to try, and I want to develop a program ...
2
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1answer
819 views

DIY Ev3 from schematics

LEGO offers schematics for the Ev3 brick in their hardware developer kit accessible from the bottom of the Ev3 downloads page. (Files 1 and 2 in the zip) Do these schematics contain enough information ...
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6answers
22k views

Where can I download the EV3 education edition software for free?

I have a site license but I'm not able to find the download for the software anywhere. Any help would be greatly appreciated.
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2answers
197 views

A wired data logging brick

I need a data logging brick where I can wire an input to the file name. Is this possible? and if so how would I do this?
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4answers
6k views

No software with the EV3 robot?

We bought EV3 robot but it looks like there is no software and we have to pay an additional $99 for the EV3 software. Is this true?
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1answer
2k views

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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4answers
48k views

What is different between the EV3 Home and Educational sets?

The newly announced LEGO Mindstorms EV3 sets for home and education have some differences, but it isn't clear to me what they are, specifically. It seems that have different sensors, perhaps ...
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4answers
2k views

IDE recommendations for EV3 programming

Does anybody have any recommendations for non-GUI programming of the EV3 unit? I'm impressed by the LabVIEW software, but as a professional C# and VB.Net programmer (with C, C++ experience), I find ...
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1answer
765 views

Raw sensor question?

What is raw sensor and what is on port 3? Is this code only for robot to go completely straight without errors?
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1answer
1k views

Use legacy RCX sensors with EV3

In NXT-G, there was a "Legacy" Block pack which had blocks to allow for the use of RCX motors/sensors with the NXT, as long as you had a converter cable. However, the EV3 software does not have this, ...
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1answer
2k views

How to close color Sensor properly?

I want to get data from the color sensor with Bluetooth. I can get data but when the program terminates, the color sensor dose not close even though I call function close() on the color sensor. The ...
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1answer
442 views

Color sensor use in Commander app

I'm trying to build the MindCub3r model shared online at http://mindcuber.com. It often has trouble scanning the cube so I wanted to check the output of the colour scanner by using the Commander app. ...
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1answer
1k views

Is the LEGO Mindstorms EV3 brick waterproof?

I am trying to build a ROV (Remotely operated underwater vehicle) with LEGO Mindstorms Ev3. Is it waterproof?
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1answer
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DNX on LEGO Mindstorms

I am not familiar with ARM development but I am wondering would it be possible to compile DNX against LEGO Mindstorms EV3 processor. I know there is some ARM support and even there are some builds ...
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1answer
3k views

LEGO Mindstorms EV3 crashes on OS X El Capitan

I get the following problem details, can anyone help me? Process: MindstormsEV3 [595] Path: /Applications/LEGO MINDSTORMS EV3 Home Edition.app/Contents/MacOS/...
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1answer
271 views

Loop doesn't work, always inputs the same condition

I have a loop but always inputs the same condition, please see the picture.
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0answers
657 views

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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1answer
649 views

LEGO Color Sensor - EV3

My son is using his EV3 with a color sensor. He is using the sensor to test the reflectivity of different materials. Can you please tell me what the letters "PCT" stand for?
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1answer
266 views

How can I make an EV3 vehicle follow an elliptic equation?

Has anyone succeeded in having the EV3 driving base moving following an ellipse? I would like the kids to think about how would we program a satellite orbiting around earth. They would input the ...
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2answers
10k views

Where can I find LEGO Digital Designer projects for Lego Technic MOCs?

I have LEGO Technic pieces collected from multiple sets and would like to find projects on the web which I can view and build models step by step. Please advise sources where I can find these.
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1answer
3k views

How can an EV3 motor “remember” it's starting position?

I am currently working on a project that uses large motors. I want the project to return to a "starting position" (0,0,0) at the touch of a button so that it can be used multiple (identical) times. ...
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1answer
2k views

Where can I find a good tutorial on programming with Lejos?

I want to get started with LeJOS and use Java to check to see if an EV3 touch sensor is pressed, but I can't find any decent tutorials. Are there any good resources for this?
7
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1answer
7k views

How do you program mindstorms to keep doing a task until either the IR OR the colour sensor state changes

How do you program mindstorms to keep doing a task until either the IR OR the colour sensor state changes. I would like to use the wait block but it can only be either the colour sensor or the IF ...
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2answers
1k views

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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1answer
518 views

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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2answers
608 views

Programming with Lego Mindstorms EV3

I know this question was asked in the past, but I want an up-to-date answer. What is the best way to program with the NXT with a oriented object programming language? Ideally C#, C++ or Java (maybe ...
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3answers
2k views

What is known of the capacities of the MINDSTORMS EV3 when it comes to interconnection with a network (WiFi, bluetooth)

What is known of the new MINDSTORMS EV3 capabilities when it comes to netwoked functions. What type of interface can be plugged to interact with a PC or portable device (smartphone/tablet)? In term ...
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3answers
16k views

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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3answers
895 views

Made a big program in EV3's programming software for AI creation and it went from slow to not loading

Made a big program in EV3's programming software for AI creation and it went from slow to not loading. It just displays the loading bar in the middle of the page. Even my lenovo windows 10 8GB RAM ...
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0answers
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.
4
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1answer
108 views

System files deleted somehow

I think my son accidentally deleted all the system sound/image files, etc. I have tried loading the firmware but that does NOT restore the files. Is there not a way to just upload the system sound and ...
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3answers
4k views

EV3 Education Edition software license

I got a new EV3 education kit. Can I install it on a several computers or does the license work on one computer only?
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2answers
1k views
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2answers
3k views

Is it possible to access the RGB values of the EV3 Light Sensor?

I'm following a line with the LEGO EV3 Color Sensor in Reflected-light mode, I need to stop the robot when it detects a green tile in the ground, but I didn't succeeded in differentiating Green and ...
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1answer
1k views

How to parameter the ports in move tank block EV3?

How do I parameter the ports at Move Tank block (in My Block)?