VS Arduino - delay when {@Plot.} value

Jul 4^th, 2025 at 2:01pm (UTC)

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VS Arduino › Visual Micro › Usb/Serial/WiFi Debugging › delay when {@Plot.} value

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delay when {@Plot.} value (Read 677 times)

Christoph Junior Member Offline Posts: 40 Joined: Sep 4^th, 2020	delay when {@Plot.} value Nov 5^th, 2024 at 10:58am	Print Post
	Hello guys, I appreciate the usage of the vmicro debugger fully. The only thing I struggle, sometimes or mostly, the plotted values have very big delay. In my current project, the remote controlled robot makes weired behaviour and I would like to observe via wifi debugging. So I implemented the ps2 remote controller and simple plot the value of the analog joysticks. One time the delayx was very short but most of the time its above many secvonds, which makes the usage difficult. Also observed, when the plot wibdow is closed and the Output in the [Micro Debug Trace] immidiatly shows the changed joystick value. Can someone help me improve the setup ? Many thanksd in advance Christoph

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Simon@Visual Micro Administrator Offline Posts: 2722 Joined: Feb 13^th, 2019	Re: delay when {@Plot.} value Reply #1 - Nov 5^th, 2024 at 11:46am	Print Post
	The Plot Charts can have a delay displaying data as part of the UI Refresh. This can be changed in the top left button of the Plot Window to "at rate of incoming data", which is shown in the attached image. https://visualmicro.com/page/User-Guide.aspx?doc=Multiplot.html If you are trying to plot very small time increments, then this is often best done by buffering the data then sending it all in one go, as shown in the below video: https://www.youtube.com/watch?v=wwRawju55nk As this is being done over WiFi the buffering approach would also remove any latency of the network from the equation, so you can see exactly what is happening on the robot itself.

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Christoph Junior Member Offline Posts: 40 Joined: Sep 4^th, 2020	Re: delay when {@Plot.} value Reply #2 - Nov 6^th, 2024 at 5:22pm	Print Post
	Simon@Visual Micro wrote on Nov 5^th, 2024 at 11:46am: The Plot Charts can have a delay displaying data as part of the UI Refresh. This can be changed in the top left button of the Plot Window to "at rate of incoming data", which is shown in the attached image. https://visualmicro.com/page/User-Guide.aspx?doc=Multiplot.html If you are trying to plot very small time increments, then this is often best done by buffering the data then sending it all in one go, as shown in the below video: https://www.youtube.com/watch?v=wwRawju55nk As this is being done over WiFi the buffering approach would also remove any latency of the network from the equation, so you can see exactly what is happening on the robot itself. I changed the display rate like recommended and lowered the intervall of incomming data to 100ms. The code is like in the picture. When the Plot window opens the delay is very short, and after some time its many seconds. When I close the plot window and reopen again, the delay is again very short. Also in the picture, when the plot window is closed, the network serial monitor reacts very fast somehow like excpected. I had some similar problem once with VS windows forms and it was cause by the buffered data in the UI. So in other words, I changed the property with removing the previous data after 1000 values (incoming data was serial and much faster). Is there any setup I can change this, so the UI plot is not overloaded? Many thanks, Christoph

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Simon@Visual Micro Administrator Offline Posts: 2722 Joined: Feb 13^th, 2019	Re: delay when {@Plot.} value Reply #3 - Nov 6^th, 2024 at 6:00pm	Print Post
	Thanks for the update, and there aren't any available settings currently to change the buffer size in the UI. We will continue to investigate this and update with any changes in the software when they are available. In the meantime plotting less data would of course help, which could be done with conditions in your code surrounding the tracepoint, or using the Conditional section of the tracepoint, or using the Trigger Conditions available in the @Plot functionality. https://visualmicro.com/page/User-Guide.aspx?doc=Multiplot.html As you're trying to track undesired behaviour, I assume there are some thresholds or certain movements which cause the problem to occur which could be used in the above approaches?


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Christoph Junior Member Offline Posts: 40 Joined: Sep 4^th, 2020	Re: delay when {@Plot.} value Reply #4 - Nov 6^th, 2024 at 7:18pm	Print Post
	Thank you very much Simon for your suggestions and help


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Simon@Visual Micro Administrator Offline Posts: 2722 Joined: Feb 13^th, 2019	Re: delay when {@Plot.} value Reply #5 - Nov 7^th, 2024 at 12:46pm	Print Post
	Just to note the Experimental Web Debugger option may be of use in this scenario. Although it doesn't offer as many features as the In-Built plot windows, in your scenario there are a couple which may be handy: 1) Data is always shown at the rate received with no slow down over large data volumes 2) All Data from the @Plot chart can be downloaded as a CSV so it can be plotted in an external application e.g. Excel afterwards for more detailed analysis. To try this out just enable the vMicro > Debugger > Export Web Debugger (Experimental) option, which will show instructions in the output window for how to launch it. Your current trace/breakpoints all work as they are so its easy to switch back and forth between the Web and VS based UI's. There is a YouTube video which also demonstrates this functionality: https://www.youtube.com/watch?v=axNZlcCpt0U


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