Acquiring and plotting continuous NI data doesn't work within app Designer. Please help.

My code for acquiring and plotting live data works well outside the app Designer. However, i would like to include it in an App where it is executed by pushing a button from the user.

This is my code:

if true
  devices = daq.getDevices

            %session erstellen
            s = daq.createSession('ni')
            addAnalogInputChannel(s,'DEV1',0, 'Voltage')

            %abtastrate in Hz und Aufnahmedauer
            s.Rate = 1000
            s.DurationInSeconds = 5
            % plottet soblad fesstgelegte Anzahl an Datenpunkten generiert ist
            s.NotifyWhenDataAvailableExceeds = 10

            lh = addlistener(s,'DataAvailable',@(src,event) plot(event.TimeStamps, event.Data))

            s.startBackground();

end

This works well so far. But if i integrate it in a buttonpushed callback function within app Designer it doesn't work. Also it doesn't work if i try to plot it in UIAxes by adding plot(app.UIAxes, event.TimeStamps, event.Data)

Any help would be much appreciated. Thank you, Marvin

Answer 1

[Andrei]

Can you refer to "Data Acquisition Live" app, which can be downloaded from File Exchange.

https://www.mathworks.com/matlabcentral/fileexchange/66040-data-acquisition-live-app

This example app shows how to use Data Acquisition Toolbox and App Designer to build an app which:

• acquires data from a DAQ device or sound card
• displays a live view of acquired data
• logs acquired data to a MAT file

[han xiao]

Hello Mr.Ursache,

My name is Han. I`m a user of data acquisition toolbox and doing tests with live vibration signal. Your app design is very cool and useful, but still I have no idea on how to create a standalone application and deploy it on the target machine (without MATLAB installed).

That would be very kind of you, if you may give me some help. I`m very grateful!

Kind Regards

Han Xiao

[Andrei]

Han Xiao, you can use MATLAB Compiler to build a standalone executable app from an app created with App Designer.

https://www.mathworks.com/products/compiler.html