Connecting to Arduino with Matlab on Windows 7

Hi,

I am trying to connect to my Arduino Uno through Matlab 2012a. I have looked through the forums and can't seem to find anyone with quite this exact issue.

I have already successfully installed the drivers and confirmed an operational connection through COM4 using the Arduino IDE. Now, after installing the Arduino toolbox for Matlab, I get the following error:

Open failed: Port: COM4 is not available. Available ports: COM1, COM3. Use INSTRFIND to determine if other instrument objects are connected to the requested device. Error using arduino (line 83) Could not open port: COM4

I get the same error when tring to connect on my own without using the toolbox using 'serial' and 'fopen'. I ensured that the Arduino IDE is closed prior to attempting this, so that is not the issue.

Any assistance is much appreciated. Thanks!

-Nick

[Alon]

This can be solved many times by closing and re-opening MATLAB, or re-booting the computer.

Answer 1

[Rolfe Dlugy-Hegwer]

Nick, Try closing the Arduino IDE and Arduino Serial Monitor tool before using the Arduino toolbox for MATLAB. Otherwise, reboot your system and leave Arduino IDE unopened.