MATLAB Answers


External Mode - Raspberry; re-connect

Asked by Rene Essink on 24 Mar 2017
Latest activity Commented on by Liew Tian Chin on 6 Apr 2018
actually I’m working on a Simulink-Model, that collects temperatures from 1wire sensors and switches relays to control a heating / cooling system on an external system (Raspberry Pi ).
The start of Simulink, the external connection and the execution oft h code on the Raspberry PI work well.
Also the disconnection works well, without losing functionality on the raspberry-process.
The problem is, that it not possible for me to reconnect to the process on the Raspberry Pi, after Matlab/Simulink was closed and restarted. Trying to do that, the following error message appears:
"The model that you are trying to run in External mode does not match the application running on your target. Rebuild the model, run it on your target, and start External mode simulation again."
(see attached error message)
I didn‘t change the Simulink-Code in the meantime. Is a „reconnect“ to the raspberry-process after a restart of Matlab/Simulinkch in principal not possible or do I make a mistake? Greetings Rene

  1 Comment

Hello Rene! sorry for little offtopic but I try to read 1wire (18B20) in RPi using simulink. Honestly I want to experiment with the same temp. control idea as described in your post above. I realized that there isn't 1wire block in raspberrypilib. Could you provide me with the information how did you managed the problem. regards, Marek

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3 Answers

Answer by tang
on 25 Apr 2017

I have the same problem. Does anyone solved it.


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Answer by shz
on 10 May 2017

I had the same problem You should kill the process that doesn't let to run your code. for that you can use command "openShell(mypi)" to open the RPi shell Then you can use command "kill pid" or "killall proc" to kill all of them and then try again

  1 Comment

Can I damage something that is installed at my Pi? Or does this mean that I only stopp all process at the PI?

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Answer by Madhu Govindarajan on 31 Oct 2017

Another way would be to open the shell as mentioned above and deleting the folders related to the specific model and re-run it. This has resolved the issue for me several times.


I know how to open the Shell but than? How can I find the folders? Which command? Thanks.
The simulink model files usually located in /home/pi/.... Try ~$ ls /home/pi/ command. You should see your project files name, three of them all together. Deletes all of them. Then, re-run your model in external mode. Everything should work fine.
To deletes file, refer

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