trying to connect to arduino but dissapears from serialport​list("avai​lable")

Sorry if this is me being ridiculous but it's driving me up the wall!!

Trying to replicate a device using an arduino. All set up and the device once plugged in comes up as 'available'. I then try to connect and nada! I list the available ports again and it has dissapeared!

Any help??

>> serialportlist("available")

ans =

"COM3"

>> serialportlist("available")

ans =

1×0 empty string array

>> delete(instrfind({'Port'},{'COM3'}));

Warning: instrfind will be removed in a future release. There is no simple replacement for this.

>> serialportlist("available")

ans =

1×0 empty string array

Answer 1

[akshatsood]

Dear @Martin Todd,

I understand that you are encountering issues with arduino disconnecting or not being recognized properly by MATLAB after an initial connection attempt.. Here are a few suggestions to help troubleshoot and resolve the issue:

Check Physical Connections:

• Ensure the USB cable is securely connected to both the Arduino and the device.
• Try using a different USB cable or port if possible.

Check Device Manager (Windows) or System Information (Mac):

• On Windows, open Device Manager and look for the "Ports (COM & LPT)" section. Check if your Arduino appears there and if any warning icons are displayed.
• On Mac, open System Information and check under "USB" to see if the Arduino is listed.
• If the device appears with a warning or not at all, it might be a driver issue.

Use serialport in MATLAB:

• Since "instrfind" is deprecated, consider using the "serialport" function for managing serial connections.

% Create a serial port object
s = serialport("COM3", 9600); % Replace 9600 with your baud rate

I hope this helps.