Simulink COM port error

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Nicholas Imlay
Nicholas Imlay on 5 Feb 2018
Commented: Zaryan on 15 Mar 2024
If I do not connect to Arduino Due with MatLab. I get the following response in the diagnostic viewer.
The following error occurred during deployment to your hardware board: Could not connect to specified Arduino board.
Verify that the board is connected to your host, and that the host COM port number set in the model matches the COM port number in Windows.
To change the host COM port number in the model, click 'Simulation ', click 'Model Configuration Parameters'... In the dialog that opens, select the 'Hardware Implementation' pane, click 'Target hardware resources > Host-board connection' and set the COM port number.
To find out the COM port number in Windows, open Device Manager and open your board in the COM ports group.
My COM port for the arduino is COM3, which I have already set manually in Simulink.
If I connect to the arduino from MatLab, I get the following response.
The following error occurred during deployment to your hardware board: Open failed: Port: COM3 is not available. No ports are available. Use INSTRFIND to determine if other instrument objects are connected to the requested device.
HITESH TRIVEDI on 20 Mar 2019
I too tried it , it doesn't work....can anyone help us??
Zaryan on 15 Mar 2024
i have ch340g arduino mega and i am facing same issue

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Answers (3)

Kevin Graebner
Kevin Graebner on 22 Apr 2019
I am running matlab r2019A and am having the same issue, though i just recently updated the arduino packs.
the funny thing is when i follow the arduino engineering tutorial it works ok but when i just try to get a digital input signal to show up on a scope it wont work at all! please help
  1 Comment
menezes roshal nikhil
menezes roshal nikhil on 4 Jul 2019
Same problem here, before update everything workes fine

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Mirko Milz
Mirko Milz on 15 Apr 2020
Hi guys, i had the same problem. Try to press and hold the ERASE Button on Due Board for about 3 seconds before you start the simulation (Create and run instrumented application on hardware. Monitor signals and tune parameters (external mode)). You have to do this before each new simulation.
Hope this helps you.

dimuthu chathuranga
dimuthu chathuranga on 9 Apr 2021



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