XCP internal error in arduino uno

I try to connect and use Arduino uno but I am facing this error: External Mode Open Protocol Connect command failed

Caused by: Could not connect to target application: XCP internal error: timeout expired, in response to XCP CONNECT command

Answer 1

[Harsh]

Hi @Mohammad,

I understand that you are facing the "timeout expired, in response to XCP CONNECT command" error while connecting Arduino Uno.

Please try the following troubleshooting steps to resolve this error:

• Try decreasing the baud rate. For example, you can try setting the external mode baud rate to 115200 rather than the default setting of 921600. This can be found on the "Hardware Implementation" page of Configuration Parameters. On this page, look in the "host-board connection" group of the table under the drop-down for "Target hardware resources".

• Close any other applications that may be using the serial port.
• Verify that the correct USB drivers are installed.
• Try using a different USB C to USB A adaptor if applicable to your setup. There may be data transmission limitations depending on the specific drivers and adaptors involved.
• Increase the XCP target polling time.

I hope this helps, thanks!

[Mohammad]

hi

thanks for your help

in host board connection I couldn't fid those options. in serial port properties the highest rate is 115200

[Harsh]

Hi @Mohammad,

In that case, I recommend trying a baud rate lower than 115200.

Thanks!