Can't connect to target application in Simulink - Lego Mindstorms EV3

Hello,

the question is quite simple. I tried to control my LEGO ev3 block from MATLAB script and it works. However trying to run ev3 from simulink is not succesful. The error message is this:

External Mode Open Protocol Connect command failed

Caused by:

• Could not connect to target application: XCP TCP/IP error: Connect failed

Does anybody know how could I succesfully connect simulink to ev3 ?

Thank you.

Answer 1

[Asim]

Hello Ondej,

I understand that you are encountering 'External Mode Open Protocol Connect command failed' error while using Lego Mindstroms EV3 with MATLAB R2023a.

This error has been extensively discussed in the community, and there have been numerous proposed workarounds. I recommend exploring the following discussions where you can find valuable insights and potential solutions.

https://in.mathworks.com/matlabcentral/answers/1988388-f28035-xcp-connection-error?s_tid=srchtitle

https://in.mathworks.com/matlabcentral/answers/1805400-why-am-i-getting-a-xcp-internal-error-timeout-expired-error-during-monitor-and-tune-for-ti-f280?s_tid=srchtitle

https://in.mathworks.com/matlabcentral/answers/2010587-xcp-on-serial-custom-board-c2000?s_tid=srchtitle

I hope this helps.

Best Regards,

Asim Asrar