LabVIEW arduino communication

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• LabVIEW - Arduino TCP/IP, connecting multiple Clients

  Hello

  I'm working on a connection TCP/IP between an Arduino shield WIFI control with several sensors and a LabVIEW program. You use a router, I set up a wireless network without internet that allows me to transmit the readings from the sensor of the MCU and send commands to control LabVIEW program. Currently, the Arduino is the server with the program LabVIEW connects to it as a customer and I would like the opportunity to add other clients such as a smartphone application at the same time. I am not able to connect several clients for my server Arduino based and wonder if and how this would be possible if the server was created on my computer using LabVIEW instead.

  I searched for help on the Arduino forums (http://forum.arduino.cc/index.php?topic=268578) and comments ranged from "Arduino can support multiple clients" to "Arduino can support multiple clients but it is full of errors. While it would be easier to achieve my goals by having the server on the MCU, as much data would be sent directly to each poll, the client I plan to switch to a server on computer using LabVIEW. My question is whether it would be possible to have multiple clients access to my new server, and if so, how it would be difficult to relay data from the sensor? The old plant requires the same data string for each client connected to my server. The new configuration appears as it would take the server to treat customers differently; Send commands to the MCU customer and data of the sensor of the MCU customer to everyone. Another layer of complexity is that I would need to relay controls of other clients in the same way, as the phone app smart sends a stop test command, to the Arduino via the LabVIEW program.

  Would be very grateful of entry to the community.

  Best,

  Yusif Nurizade

  You can create a server in LabVIEW that accepts connections from several clients. There are examples of different approaches to this in examples of shipment of LabVIEW and on this forum. As for the challenge of sorting where to send the data and how to transmit orders, it is-there is nothing that would make whether easier or harder in LabVIEW that in any other environment.

• LabVIEW arduino uno bad data transfer

  Hello

  I have some problems with the transfer of data from the arduino uno to labview.

  I did a VI where I can control the power of a heater with measurements of temperature with arduino uno.

  The problem is that from time to time the incorrect temperature is captured in labview by missing the number or a number, for example. LabVIEW gets 1.25 ° C instead of 15.25 ° C or 2000 ° C instead of 20.00.

  When I look at the program arduino tracer series these errors do not occur. So I guess it will be a problem with the settings of labview or my VI.

  Parts joined a set of data extracted from the VI and VI himself and the arduino script

  Yes.  The Subvi has 2 major problems.

  The first is as I said.  You set up and close the serial port each iteration.  There is a risk that the device could be send data that you won't miss the moment, that the port is closed.  (Even if she doesn't really explain why you miss the decimal point in the middle of the data bytes.  Serial ports must be configured and opened when the program starts.  Writing and reading within the loop.  And not closed when the program ends.

  The second major problem.  Why you have the property Bits of data cable up to the number of bytes to read.  Bytes and pieces is two different entities.  And in this case, the data bits is the number of bits of data defined by the configuration of the serial port.  Probably 8 and would still be 8 and has nothing to do with the number of bytes actually in the serial port.  Number of bytes to read is how many bytes you want to actually read the serial port, could be 1, 50, 1000,...

  Is your device send data continuously without asking?  Should I use a stop character?  If this isn't, by using a stop as a return character, carriage or line break, then it should.  It will help you to break the ASCII data that crosses into packets.  Configure your serial port is set up to search for characters of endpoint and it would be a line break character. Use the termination character, and tells your VISA read an arbitrarily large number.  A number that is larger than the longest message that you expect to receive.  The VISA read will return as soon as she sees the character of judgment and you give a full data package.

  It is often a good idea to have a communication protocol of request/response with your device.  You write a command that says 'give me the value.  It reads and responds to the back and gives value.  Otherwise if he sends just data continuously without asking confirmation and that you do not read fast enough, you could extend your serial port (which would give an error and you could lose data), and even before that, you could read old data which is at the front of your stamp series while your device has already sent hundreds of data points more after that.

• VISA reading significantly slows down to 20 Hz (Labview, Arduino + Xbee project)

  Hello

  I am quite new to Labview and Arduino, so I apologize if I use the incorrect terms. I'm having some trouble with the next project, I hope that you guys can give me some advice!
  I have 16 sensors connected to the 16 analog pins on an Arduino mega Board. This Council has a shield mounted upon him, with a Xbee module wireless. I have another Xbee module that communicates with him and it is mounted on a USB dongle that plugs into a PC with Labview 2015.

  The A/D analog Arduino pin output is read and sent every 50ms to the Xbee module connected to the PC. So every 50ms (that is, a frequency of 20 Hz), a new line of analog readings by commas is sent, using AnalogRead and Serialprint in the Arduino. These data are fed to a Labview code with architecture of producer-consumer. Copy the following code configures a serial port of VISA, reads the data, it converts a voltage value and writes the data to a text file (see block_diagram.jpg).

  The problem is that at a frequency of 20 Hz (with the configuration of the attached jpg) when you reach 400 treatment iterations the code slows down considerably and values are not parsed correctly. It behaves as if the queue is full (but the queue of elements indicators show 0) or memory or the buffers were full. It seems quite surprising to me given that the sampling rate is so slow. I tried a few configurations setting the buffer size, empty the buffer by using the queue time, but nothing seemed to work. Is it because the processor loop takes too much time to iterate? I tried to disable data analysis, conversion of voltage and the generation of text file, just keep reading and still have the same behavior.

  This may be the cause? Suggestions to change the block diagram are welcome! Is there a better way to do this than with VISA or queues...?

  I use Labview 2015 on Windows 7.

  Thank you!!

  sminanog wrote:

  It behaves as if the queue is full (but the queue of elements indicators show 0) or memory or the buffers were full.

  You think along the good things. But the big problem I see here is that you have a table growing up to stop the program.  You must move the file writing to be inside the loop of your consumption.  This will eliminate the need to constantly develop your table in the shift register, with tons of memory and causing copies of memory (which is very expensive).

  The other concern I have is the speed at which data is available.  If you have a baud rate 9600, then in the 50ms debit you can pass 48 bytes.  This leaves 3 bytes per sample, including the comma.  If you have a debit 115 200 baud baudrate, it turns into 576 bytes, you can send the 50ms.  So the lesson here is to make sure that you use a transmission speed which is fast enough to handle the data that you want to send.

• LabVIEW, arduino y blueto

  Buenas, Estoy intentando realize Comunicación con labview bluethoot y arduino, uso UN programa that works cuando esta mediante el USB conectado,.

  ago di alta el arduino in the computadora me da 2 puertos com In el Vi.ini the pongo q h. con bluemirf algo asi, 9600 blueto not baud rate y intento con ambos COM pero no works, arduino con esta el knew fuente externa USB cable, con el programa LIFA cargado sin y el diagrama del bluethoot use're este.

  

  could fits what tengo q hacer o alguien me falta?

  o If alguien me can pasar a programa than h. Quebec long solo UN led o algo para comparar en as ando evil.

  I did a little research on the LIFA firmware and:

  If you installed labview for arduino interface you should find it under C:\Program NIUninstaller Instruments\LabVIEW (your version number)\vi.lib\LabVIEW Interface for Arduino\Firmware\LIFA_Base\LabVIEWInterface

  On this folder, open LabVIEWInterface.h with Arduino IDE

  find this:

  "

  #if defined (__AVR_ATmega1280__) | defined (__AVR_ATmega2560__)

  #define DEFAULTBAUDRATE 9600 / / sets the default series transmission speed (it should match to the specified baud rate in LabVIEW)
  #else
  #define DEFAULTBAUDRATE 115200

  "

  change to this:

  "

  #if defined (__AVR_ATmega1280__) | defined (__AVR_ATmega2560__)

  #define DEFAULTBAUDRATE 9600 / / sets the default series transmission speed (it should match to the specified baud rate in LabVIEW)
  #else
  #define DEFAULTBAUDRATE 9600

  "

  In the code it said essentially that default baud rate is 115200, if you are not using the Arduino Mega.

  You just need to change the code so default baud rate set to 9600

  I hope that you can get there.

• TCPiP betwenn QT-Server und Labview-Client communication

  Hello all,.

  IAM new in network programming with LabVIEW.

  I have a problem of communication of data via the TCP/IP protocol. I created a simple Client.vi that connect to the QT C++ server. If the connection is established, Client.vi sent a simple string "Hello" to Qt-server.

  the problem is: Qt-Server receives an empty string with size 0!

  Client.VI

  

  QT-Server

  QT-feature receive data :

  

  Help, please

  Of a possible problem you have, is that you look for a size of qint16. I'm not familiar with QT or used in the syntax of C++, but the duration of LabVIEW is an int32 and so 4 bytes. LabVIEW Typecast also creates big endian data stream, which means that the length of the string will be-> LSB MSB ordered, do the first 3 bytes in the flow of a 0 byte, causing your routine determine that there are 0 bytes to read.

  You have read 4 bytes for the length parameter, change the byte order for your local boutien, more likely to have to share the big endian to little endian number and think of it as the number of bytes to read for the string.

• LabVIEW: No communication with the RAD-2 USB adapter table.

  Hello

  I try to use a DL2 - N adapter USB to I2C/SPI/GPIO Dinah (https://diolan.com/dln2). This constructor provides drivers for the Council as an example Labview vis I want to just use them to access all interfaces through Labview. After that, I design a test configuration for our latest range of products using this adapter card.

  What I did:

  (1) new installation of Labview 2014 (version evaluaton). System: DELL Precision M6800 (i7), Windows 7 Professional SP1.

  (2) install the drivers OR VISA and NOR-488. 2 (14.0).

  (3) install the drivers from manufacturer as explained on the Web site of NOR.

  (4) run Labview.  I can see instrument pilot screws under the range of function and run the example screws so far, ok (I guess)

  (5) run NI MAX. No listed USB port. Only COM1 and LPT1 (printer port).

  (6) I ran a few windows test applications provided by the manufacturer to access all the NXP microcontroller interfaces in the DLN2. Everything works. I can read the analog/digital, power digital input values and use the SPI and I2C (I see the SPI/I2C frame Sin a scope).

  I spent a day through the various links in the Web site of NOR (have watcheing almost every video demo on the site) and are still not able to guess why Labview can not see my USB device.

  Any clue?

  Kind regards

  Jose

  Hello

  Problem solved. After contacting with Dinah (the manufacturer of the adapter card) they updated the driver library. Now the USB communication and all peripheral work of the microcontroller. I have a UART, SPI/I2C (master and slave), GPIO 48 and 8 inputs analog (10 bits to 1 MHz). All accessible via USB and for less than $ 200 USD (that's way less the HW OR equivalent).

  With Labview, it can be used without any problem. Not a Council weird at all, if you know something about the material.

  Bravo for Dinah!

  Jose

• labVIEW Arduino interface

  Hey,.

  I've interfaced arduino and labVIEW 2012. I run the LIFA_Base file in the window of the arduino and then close it and run my program in labVIEW. whenever I have stop the labVIEW program and the next time I run the program in labVIEW, that it's not until I reupload the LIFA firmware. So, what is the solution such that I did not download the LIFA firmware every time.

  Good quick response.

  Rich.

  Rich,

  I think your code is good enough to read the data in series.

  Please check the attached sketch (which is the same as what you have downloaded to the arduino) also I join the LabVIEW VI to read data series.

  Please make sure that the COM port that you use for arduino should be the same for LabVIEW.

  Also close to the arduino.exe (the software through which you have downloaded the sketch.

  Then, run the supplied LabVIEW VI.

  Better use of the arduino with LabVIEW, you can find step by step here information

• LabVIEW RF Communications Viterbi decoder

  Hi guys ~!

  I am developing a 32-bit Viterbi decoder. I am currently using Viterbi decoder it draws from the available FPGA RF Communications here. However, I can't do things. 'Decoded bit' output of the decoder, Viterbi that VI is always zero, any symbol coded is. I put the VI within a while loop any constantly enter Mobby entry encoded within the VI. The VI that I use is shown in the picture and the project that I developed is in zip archive! Thank you very much!

  Hi ArisEnding!

  I looked through the example of Viterbi decoder and your code and there seems to be differences. Looks like you have deleted information of lattice and hamming from the block schema information. I'm not an expert with the Viterbi algorithm decoder, but these seem to be required by the algorithm. It looks like you this change on purpose. If you are looking for others with a more intimate knowledge of the Viterbi algorithm decoder, I recommend posting on the example page communityViterbi decoder.

  Best,

  -tannerite

• Local SQL & Labview database communication

  I created a database of sql with sql server 2008 R2. I want to be able to insert data into this database locally. Can someone please tell me if this is possible, and if possible, could someone give me the steps I have to follow?

  Thank you.

  I solved my problem.

  The way I fixed it, is as follows:

  1. start all sql services in windows services

  2. go to C:\Windows\SysWOW64 and find odbcad32

  3. open this file

  4. click on the system dsn name, click Add and add a sql server

  5. complete all configurations and select the .sql

  The problem I had was an architecture problem, because I use windows 7 x 64 and I created the reference in odbc, using the 32-bit odbc.

• TCP - LabVIEW (Client) to Arduino (server)

  Hello LabVIEW community.  I had considered this ad in the Arduino community, but I thought that LabVIEW community most likely to know the answer.  Sure... copy paste really not difficult.  in any case...
  I am wanting to create a VI that will allow me to stream my Arduino via the network.  My thoughts: the Arduino have be a TCP server and LabVIEW client.  I've got code Server Arduino.  I advanced and tried to use the Client of TCP data (and other examples of LabVIEW TCP) in an attempt to connect to the Arduino just to prove that he was capable b4 moving this project.  No luck.  IP is correct as well as the port.  So I'm clearly something wrong.  Questions: Is it possible?  Is there a better (or just another in general) to do exactly what I want to do?  Are there examples out there (I looked vigorously) who could help me get started in the way of debugging?  Why the sky is blue?  Any help would be greatly appreciated.

  I guess it comes from (and this is my limited knowledge of networking and TCP) is that you don't broadcast data from the Arduino.  You basically take momentary shots.  So I have also attached my TCP on the Arduino code.  Note: The TCP code must be independent from the rest of your code.  As you can see, it's an If statement.  Available in the code samples use a while.  I have put code in place to just ping 10ms for the data.  You will need to make some changes, I'm sure.  I cut a lot of my code out of it because it doesn't make any sense.  But this should really help.

  PS: I had to put the code in a .txt file, because this forum knows what a .ino is.

• analog multiple read arduino serial communication

  Hello

  I'm working on a project and I'm new to Labview,

  Can someone tell me how to read the multiple analog playback on Labview in communication series with Arduino UNO?

  I tried, but data are somehow in error.

  I have also attached my current code of vi and arduino.

  Please help me.

  Hello

  You then send a value of more than your Arduino project. But in you VI you do not analyze the data entering split of voltage and current.

  I suggest that you send a fixed string with voltgae and data current so that you know in your VI you will receive the number of bytes and how to divide the data.

  Kees

• Problems with arduino labview Interface

  I have the labview-arduino interface, but the problems came when I run the program, sometimes it work perfectly, but sometimes (almost all the time), I can not connect this time, the series of programs and do not show any kind of problems, I can see that in the resourse computers two visa, I don't know if it's because she I soppose comunication , but my arduino do not work, and I can use perfectly with the arduino IDE, but not with VISA, I used the Arduino IDE to be shure that works my Arduino board

  so if you know how to solve this problem, please help me!

  Thank you!

  There is no need to host files somewhere else.  Feel free to download on the forums and attach them to your message.

  Minor first comments.  Why are you re-reading your every 2 seconds config file?  Expect you to change?  If it is then played once and not proofread.

  I think it would be better if you stopped when an error occurred, you can do this by wiring to the RO error enter the stop condition, or use the arithmatic composed with gold.

  But I think the main question you have, it's that your Arduino reference may be whipped out if you do the wrong things.  If your equal comparison is false, you go to the wrong case, where you are not passing the arduino reference.  So when you go to close you don't close your reference and your equipment will always be open, and you try to run again will result in an error.  For even if your loop runs for 0 iterations your reference is lost.  An updated version, which has some of these changes is attached.

• Arduino uno error 5002

  Hey,.

  I'm using labview 2011, lifa 2.2.079, arduino uno rev3 connected via usb to the pc

  If I open Device Manager I find under ports: arduino uno (com3)

  also if I open or max, devices and interfaces in series and parallel I find com3 when I click it I find in the device status area: this device does not work correctly

  I also checked my Arduino board using the arduino software, I tried to download the example of Flash and it works if this isn't a hardware problem

  but when I am trying to build all vi (I tried one which turn on and off the led to pin 13) or by using any instance in the for example the analog player lifa vi I get error 5002 and nothing works...

  I checked baud rate and I tried to increase the timeouts and I created a constant for VISA resource choose com3 in the init.vi (all these are solutions found in other discussions here in the forum) and nothing worked I still get the error

  can someone help me in this?

  Thank you very much

  Download the 1.0.5.then from the arduino between software software, click on file > open... > c hard drivefor example) > program files > instruments > labview > vi.lib > labview national interface for arduino > firmware > lifa_base > lifa_base. then download the file on your chip, close the software, enter labview and run your vi It should work. If you do not understand, you can follow the steps mentioned in a youtube video... Enter youtube.com > labview arduino... Watch the first video that appears.

• VISA: Communication with "Optris Laser Modul" via a port series

  Hello

  I use a "Optris Laser Module" for measurements of temperature (see attached pdf). This module could be connected via usb to the computer. The pilot of the laser module generates a serial port (COM4 on my PC). The manufacturer's software works without any problem.

  The next step is to use labview for communication. Unfortunately, I did not find driver.

  The manual shows the adjustments for the serial port

  baudrate: 9.6... 115,2 Kbauds

  data bits: 8

  parity: none

  stop bits: 1

  FlowControl: no

  Normally, the module communicates with a binary protocoll. With a special order, it is possible to change the protocoll in ASCII. To change the protocoll you must write "Dezimal: 131" or "HEX: 0 x 83 '. The answer should be 1 byte with '0 = protocoll binary' or '1 = ASCII protocoll.

  I wrote a little VI (see table at right) to change the protocoll. I am not getting any error, but also no answer.

  Anyone have an idea where the problem could be found in the code.

  Thank you very much and best regards,

  Michael

  P.S.: If you attach the code, please use LabVIEW 8.2.1, if I'm not able zu read the code. Thank you.

  Attached: Small manual for "Optris Laser Modul" and VI.

  You would be he catalogued to U16