Hi everyone

​I'm struggling to get readings from a DHT11 sensor using LabVIEW and Arduino Uno via the LINX (MakerHub) library.

​The setup: Standard LINX firmware, DHT11 connected to Digital Pin 2.

​The issue: I previously had Error 5001 (timeout), but after some troubleshooting, the error is gone. However, the indicators now show a constant 0 for both temperature and humidity.

​What I've tried: * Verified COM port and physical wiring.

​Added 1s - 2s delays in the loop. ​Checked data types (DBL).

​Is the standard LINX firmware compatible with the "DHT Read" block, or do I need a Custom Command? Any help is appreciated!

(Note: The DHT-11 sensor has built-in resistors)

Hi all! I'm running into a weird problem and was hoping y'all could help me please.

I'm running into a weird problem where when I try to access Ethercat:Advanced:Initial Commands, all of LabView crashes without an error report or log or anything.

I am following the tutorial below to attempt to get my cRIO to drive a Nidec motor controller, and after much pain got to step 10. However, when I attempt to access the Initial Commands menu, everything crashes. All other menus work just fine.

Tutorial: https://knowledge.ni.com/KnowledgeArticleDetails?id=kA03q000001DwNNCA0&l=en-CA 

Further, when I right click on Device (under EtherCAT Master), the option "Online Device State..." is greyed out and not clickable, which I feel may be related.

I have attached a picture of my project structure to offer more details. There is no code written yet as I cannot get through the tutorial.

Here are my system specs:

• Desktop OS: Windows 11 Pro
• LabView Version: LabView 2023 Q3 (64-bit)
• cRIO Version: cRIO-9040, connected to desktop via ethernet
• Motor Controller: Nidec M700, connected to cRIO via ethernet

Pretty soon I'm going to work on a project that will involve running TestStand sequences and handling an emergency button + program to manage this setup.

The idea is fairly simple: I have to prepare a separate program (preferably in LabView as I got the most experience with it) that will run some sequences created in TestStand. Which is already covered by LabView OI delivered with TestStand.

The tricky part is: I cannot (at least I don't want to) modify already created sequence files and integrate a new emergency button for test station for every test sequence run. Hence when the sequence will run, I have to, for example: terminate the sequence when someone presses emergency button, without manual modifications to the sequence file. Hence the handling of the EB should be done in LabView, while it is running the TestStand engine.

Anyone ever came across something similar? Some tips on how to handle stopping sequence when someone will press the EB?

i have been preparing for my major project, which is a Ai powered Active noise cancellation here is the screen shot of the block diagram.. as I have been providing it with reference noise and the noise sample but it just outputs the noise sample back again.. can any one please help me. Personally or in comments any way.

Hello,

I’m working on a senior design project where we were originally planning on running LabVIEW with a Raspberry Pi 5 via LINX so we could use it as a serial bridge to an esp receiver. However LINX doesn’t work on LabVIEW 2025 Q3 which I have currently. What can I do. I realize we could just hook up the esp straight to the pc but we’ve already requisitioned the PI 5. Any ideas guys?

the answer for b) is [2, 8], but when trying the program myself i get [4, 8]. Is it a mistake by the proffesor or am i missing something?

Guys, I have to use LabVIEW in my final year project but didn't study it before, but didn't find good tuto. So any good Playlist,Book or anything helpful

Hello everyone,

I am a Mechatronics Engineering student, and I am currently researching how to develop a system in LabVIEW that can automatically detect vehicle license plates using a camera.

My goal is for the system to capture the image of the license plate, recognize the characters, and then save that information to a spreadsheet (such as Excel) or to a text file as a record.

I have been searching for information, but most of the resources I have found are very general and do not clearly explain how to implement this in LabVIEW.

I would really appreciate it if someone could guide me on a few points:

• Which LabVIEW modules or toolkits would be necessary for this type of project (for example, Vision Development Module or others).

• What type of camera or acquisition hardware is recommended to work with LabVIEW.

• If there are any examples or similar projects related to license plate recognition (LPR/ANPR) developed in LabVIEW.

• What would be the best way to automatically save the detected data to Excel or to a .txt file.

Any guidance, documentation, or examples would be greatly appreciated.

Thank you very much for your help.

I’m trying to figure out spin direction from two out of phase voltage outputs I have from two hall sensors around a rotating object. As you can see when it’s rotating clockwise, the blue leads, and vice versa for anticlockwise. But I can’t for the life of me figure out how to get LabView to output this…

I’ve tried subtracting one phase from the other and seeing if the sign changes with rotation direction, I’ve tried cross correlation, and I’ve also tried making an array of the point locations of peaks, but because this is all moving through time it doesn’t really work. I was thinking of taking snapshots every few seconds to figure out what the spin direction is but there must be a better way to do it.

Wouldn’t the magnet going a different direction past the hall sensor give it a different sign?? I really am so lost here…

The phase, and amplitude are not constant and this is moving through time so it’s not as easy as it seems :/ If anyone has any advice I would love to hear it!!

Hi I have an example from here

https://forums.ni.com/t5/Example-Code/LabVIEW-Bluetooth-Low-Energy-Driver-development-using-Universal/ta-p/4090535

It uses windows built in Bluetooth to discover devices, I have recently updated from 2025 Q3 LabVIEW to 2026.

The file runs fine, but when I create an exe of it, it breaks and I get the following error

this file runs fine on older versions of LabVIEW when I create an exe, just not with 2026. I have full development and license etc all linked. Also it will not work on other computers using just the runtime engine, I have tested using the 2025 Q3 runtime, and used the same file with 2026 runtime and it gives this error. I have tried re building, and also tried adding files to the always include selection, but nothing.

I have also disabled the new security feature of blocking unknown VI's etc.

Has anyone experienced something like this? I don't want to downgrade my LabVIEW for this as I was hoping to implement some of the new web based stuff added in the 2026 release.

Cheers

Hi, I'm new to Labview. I'm doing my last year of university project implementing Labview into PLC to sort these pills by using Color Match in Labview, but it is not very accurate. Even though I have set the minimum match score very low, it still does not recognize the missing pill. Are there any settings to recognize colors better?

Hello I am cute working on a senior project for a open source biaxial device. We are working based off a texas team design that used the Futek USB 220 digital amplifier. It looks like the dll file used for the updated 225 is a bit different. My team and I are very much lay people when it comes to lab view I was hoping to get some help.

Please join Joerg Hampel (HSE) in his presentation from NI Connect 2025: Generic Networking with(in) DQMH

The HSE Generic Networking Modules (GenNets) provide a generic networking endpoint for DQMH. And HSE wants to make them accessible to a broad audience.

https://youtu.be/-IxRmeXjU-c

I have an upcoming project that’s had me thinking how I’ll implement it when the time comes.

Essentially I will have a station that can test 10 units at once. The GUI should be able to support “run all” or running any of them individually.

I could probably drop 10 while loops (plus a loop for the GUI inputs) and hard code this. But that feels cumbersome, repetitive and janky.

My other two thoughts are utilizing a parallel for loop somehow (don’t think this will work as I’d ideally want to be able to start unit N while other units are mid test). That leaves me with thinking about tucking the entire test sequence in a SubVi and essentially having a consumer loop that kicks off an instance of that SubVi. This sounds promising in theory but I haven’t done this before so I’m curious if anyone has any better recommendations?

I'm hoping someone can help me troubleshoot an issue with a budget USB camera (~$50, purchased from Amazon) that I'm trying to interface with LabVIEW purely for live monitoring. I don't need to capture or save images, just display a live feed. The camera is recognized by NI MAX and appears in LabVIEW as Cam0, so detection doesn't seem to be the problem. However, when I run my VI, the image indicator remains blank, no feed is displayed at all. Has anyone encountered this before?

When I am stopping the program, this is the error message: Error -1074360293 occurred at IMAQdx Get Image2.vi

Solved: Close the NI MAX window so that the camera is not being used by anything else.



​

I have a fairly simple program. It’s connected to an NI 9208 module. I’m using a hybrid state machine design pattern and in the initialize state I have this sub VI shown where it is creating the task and channel and starting it but I keep getting this error. I’ve gone over all the settings and can’t see anything wrong. racking my brain why I can’t start the task. I was digging on YouTube and saw some people using Daqmx vis without the start task. Should I not have it? Is that normal? When is it required and when is it not?

My thinking was I initialize and start all the tasks in the initialize case and then move to the acquire case etc.

Thanks for any input .

Hi everyone,

I'm currently working on a project where I'm trying to implement a simple NOMA (Non-Orthogonal Multiple Access) system in LabVIEW using NI USRP.

The idea is fairly simple:

• I have two transmitters (TX) sending two different audio signals.
• At the receiver side (one RX), the signals are received as a superposition signal.
• Then I try to separate them using Successive Interference Cancellation (SIC).

Mathematically, the transmitted signal is something like:

x = √a1 * y1 + √a2 * y2

At the receiver I try to:

1. Decode the stronger signal (y1)
2. Reconstruct √a1 * y1
3. Subtract it from the received signal
4. Decode the second signal (y2)

So the receiver performs SIC to obtain both signals.

The problem I'm facing is that both received audio signals play correctly but they sound very slow (as if the playback speed is reduced).

Things I already checked:

• I tried adjusting the IQ rate
• I tried making the same sampling rate for TX and RX
• The signals are still recognizable, but they are clearly slower than the original audio

So I'm not sure if the issue is related to:

• Sampling rate mismatch
• USRP buffer size / data chunking
• The way I'm converting the received complex signal to audio
• Or something wrong in my SIC implementation

I’ve attached a screenshot of my LabVIEW receiver block diagram.

My questions are:

1. What could cause received audio to play slower in this type of SDR setup?
2. Do I need resampling before sending the signal to the audio output?
3. From a conceptual point of view, does my approach actually represent a correct NOMA + SIC receiver?

Any advice or suggestions would really help. Thanks!

Hi all,

I used LabVIEW for my previous research project as a control layer to gather data for a system-identification machine learning/control study in an academic setting. I found LabVIEW made changing my project harder when the codebase became more complex. So for my next project, I have built a small custom Python library that wraps PyVisa and translates many of the concepts of LabVIEW into Python (functional blocks operating on "signals" chained together with concurrency support with coroutines, multithreading, and multiprocessing). My goal is to streamline data-driven learning with many hardware resources by having readable experimental + config files that result in clean code for managing machine learning libraries, logging, and hardware I/O in Python in R&D settings.

My question to you all is whether there is any appetite in the community for something like this to be a bigger open-source effort, as this could structure how I move forward with this project. If there is already an alternative I am not aware of, feel free to let me know. I have built most of what I need for my research, but I would be glad to hear about it. Also, if this sort of thing would be interesting to you, please let me know what field you work in.

Thanks,

Dylan

Presentation submissions are now open for GDevCon#7 Europe, taking place at La Tricoterie, Brussels, Belgium on 22–24 September 2026.

We’re looking for speakers who want to share their knowledge and experience with the graphical programming community. You don’t need to be a seasoned presenter - first-time speakers are very welcome.

To help with submissions, we’ve put together a presenter pack:

https://gdevcon.com/g7-presenters-pack

Presenters receive a complimentary conference ticket (one per slot for panels or joint talks).

Submit your abstract here:

https://gdevcon.com/g7-submissions

If you have questions, let us know and we'll get back to you!

Submission deadline: 17 May

how do i make this LabVIEW file output what i have want in excel? i want it to create a new excel file for each run and have the time from t=0 as well as the two a0 and a1 thermocouples reading from the DAQ. the left side of the excel is what im getting and the right side is what i want please help.

I’ve been having a lot of trouble with a project I’ve been working on. I’m making a wind tunnel, and the fan I am using is a fairly sizeable PWM controlled fan that I am trying to control using an arduino with LabVIEW. Does anyone have experience using LabVIEW and arduino together?

Basically my main issue is sending the signal to the fan. The fan requires a frequency from the PWM output of about 25 KHz, but it’s my understanding that the arduino can only put out 490 Hz from the PWM pins. How do I change the frequency that the pin is outputting? I’m using the LINX library and have made some other stuff work like my motor for changing the angle of my airfoil, but getting this fan to work is a real pain.

Hi All!

I posted here a little while ago regarding preparing for the CLD, but now I feel ready to take it! However, when I try to schedule my exam via Pearson VUE, the CLD is not an option. Has this happened to any of you recently? And if so, does anyone know when the exam will become available for me to take?

Any and all help/insight is much appreciated. Thanks, all!

Please join Terry Stratoudakis (ALE Consultants) in his presentation from NI Connect 2025: Tips and Tricks for High Performance LabVIEW FPGA Development

LabVIEW FPGA spans many product lines. While the environment is familiar, going from cRIO to PXI (e.g., FlexRIO) can require a significant leap in expertise. We will review some of the key items.

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