Troubleshoot Arduino in MATLAB Online

Failed to connect to Arduino Hardware

If you fail to connect to the Arduino^® hardware board when executing commands in MATLAB^® Online™, try the following fixes:

• Check if the connection to MATLAB Connector™ exists. If connection does not exist, reconnect with MATLAB Connector, clear the existing arduino object, and then create a new object. For more information, see Troubleshooting MATLAB Connector Issues in Windows, Troubleshooting MATLAB Connector Issues in Mac, and Troubleshooting MATLAB Connector Issues in Linux.

• Use arduinolist to check the status of your Arduino board. Ensure that your device appears in the output and is not in use.

• Check if an arduino object exists in any version of MATLAB desktop.

Arduino Is Not Listed in arduinolist Output

If your board does not appear in the output of arduinolist, you can specify a larger timeout value. Use a name-value argument with arduinolist to specify the maximum amount of time (in seconds) to scan for Arduino hardware boards in MATLAB Online. For example, scan for boards associated with your credentials for up to 20 seconds.

list = arduinolist("Timeout",20)

Port Access Authorization Required

If arduinolist returns an error message that indicates that port access authorization is required, obtain the necessary permissions to access the COM port.