Do Simulink "Deploy to Hardware" and "External" modes work with Arduino Uno clones?

Hello,

There are two popular clones of original Arduino Uno:

- old clones that use CH340 chip for USB to Serial communication with PC and programming (requires 3rd party Serial to USB driver)

- new clones that use ATmega16u2 for USB to SErial communication with PC and programming (claims to use original Arduino drivers)

My question is, does anybody know, have anybody tried running Arduino Uno clones with Simulink External/Deploy mode? If yes did it work? Which board exactly were you using (new clone with ATmega16u2 or old with CH340)?

I'm asking this question because I'm planning practical demonstration on how to program Arduino with Simulink and unfortunately I can't enforce that every single participant will have original Arduino and I'm trying to find out how severe problem it can be if one tries to use clone.

[RAJIV DEY]

Thanks a lot Sudeshna

your trick works

[Haitisswaran Mutharasan]

Thanks it worked

[Erzen Sinameta]

Hi,

I'm trying to do a simple project using an Arduio clone (Elegoo Uno R3) but there isn't the external mode option when i run the simulation, so i can't complete this project.

Could you help me solve this problem?

Thank you!

Answer 1

[Sudeshna Bhattacharya]

The "Deploy to Hardware" should work fine with both CH340 and ATmega16u2 clones. For most of the Arduino boards the External mode baud rate is set to 921600. I have observed that CH340 cannot handle baudrate greater than 230400. This is the reason that External mode fails.

There is a hidden API to change the default External mode baudrate. Open the model. Check the default External mode baudrate by executing the below command:

>>codertarget.arduinobase.registry.setBaudRate(gcs)

If you want to change the baudrate to a lower value say 230400 then use: >>codertarget.arduinobase.registry.setBaudRate(gcs,230400)

If you have an issue with External mode even after setting External mode baudrate to 230400 then keep lowering it till External mode works.

Ideally the clones with ATmega16u2 that use original Arduino drivers should work seamlessly in External mode. I have not yet tested though.

[sahil yadav]

Thankyou so much for sharing the solution with us :-)

[Marvin Tagolimot]

Thank you...

[Leonardo Ortiz]

Thank you

I hope the best for you

[Amirhossein Ekhteraei]

You literally saved me Sudeshna! Thank you so much!

After three days clashing with Uno & Simulink Finally i tried your suggestion.

Mine worked with "153600" baudrate.

[Nguyen van Toan Toan]

thanks you very much Sudeshna Bhattacharya

[甚吾 立岩]

It was done successfully to apply a default baudrate "115200" for my CH340(MEGA2560).

Remaining issue is to difficult for me to stop the simulink LED brightening program.

[Miraç Gülgönül]

GREAT ANSWER, THANKS IT WORKED 115200

[J Francisco]

Thank you

[Tinotenda Ashley Mwarunzika]

It worked.Thank you so much for sharing the solution with us.

Answer 2

[Erneto Rosas]

Hello every one, i just fixed the problem, first i noticed that i just received the error message in the external mode because in normal mode that worked well, what you have to do when you are using a USB-SERIAL CH340 is to change the BaudRate by using the command codertarget.arduinobase.registry.setBaudRate(gcr,*nomberofBaudRate)

the Baud rates choices are 76800, 115200,128000, 153600, 230400, 460800, 921600, 1500000, 2000000.

mine worked using the 153660

[Pablo Goroso]

Gracias!! funcionò!!!! Thank you!!!

Tengo un arduino mega 2560 con ch340 y funcionò a 153600, a màs velocidad NO funciona.

le dejo la sentencia exacta para introducir en el command window de Matlab, suponiendo que tenemos un modelo de simulink con el nombre demo2.

codertarget.arduinobase.registry.setBaudRate("demo2",153660)

La respuesta serà:

Baud rate has been set to 153660

[Anshuman Deshpande]

Thank you, it worked with--> codertarget.arduinobase.registry.setBaudRate(gcs,153660) for Uno

[Thai Hoa]

thank you so much, After three days, i do it <3

[Amirhossein Ekhteraei]

mine worked with 153600 too. (Arduino Uno CH340)

[Ramil Ahmadov]

Thanks. Arduino Mega 2560 CH340G - 115200 WORKED! :))

[Fernanda]

Muchas gracias Ramil Ahmadov, me fue de mucha ayuda tu comentario <3

Answer 3

[Javier Pérez de Arrilucea Santiró]

I am running Matlab 2020a and I cannot even select the external mode in the drop-down menu (not appearing).

My clone is using the ATmega.

[Anthony Comer]

I was having the same issue. It's greyed out!

Answer 4

[Kwadwo Dompreh]

yes, Arduino mega2560 (clone from china) works fine in external mode for R2015a but does not work in external mode for R2017a (In normal only).

Answer 5

[Jingbo]

I tried to run simulink block in arduino board (CH340 driver) with external mode,it always shown some errors. Finally, I change another arduino board (with original driver), everything is good , external mode run on simulink went well. IF you want to buy cheap arduino board for simulink external mode and display and tune real-time.we recommend you buy farduino from Amazon that is cheaper than original arduino board.

Answer 6

[David Sandells]

I found that a baud rates of 115200 and 128000 worked for my Elegoo Nano board (uses CH340 driver). It wouldn't take the next 'standard' rate of 256000. Not sure if some other intermediate values might work.

FYI - I had previously tried changing the startDaemon file to the .m file version as suggested in the "Why am I unable to connect to Arduino in External Mode?" post. I didn't play with the delay value suggested in that post as it was already set to 180 seconds in the file provided. Anyway that solution on its own didn't have any affect but I guess it could have helped in combination with the baud rate change I mentioned above (which is why I mention it here).

[David Sandells]

I've just found a post ( CH340 max serial speed ) which states the supported speeds of the CH340 chip as ".....76800, 115200, 128000, 153600, 230400, 460800, 921600, 1500000, 2000000 baud."

I got 153600 and 2000000 (the highest one) to work on my board but not any of the ones in between!

Answer 7

[Pablo Angulo]

In Conclusion, I could work in external mode, with my Arduino MEGA 2650 Made in China whith CH340 controller in Matlab R2017b, in effect we must to change Boud Rate, in may case worked using 153660 as well, the example code is:

For the follow example you must to have opened your Simulink Project, after that:

>>get_param(gcs, 'name');

In Worspace windows :

Name Value

ans 'ArduinoTest'

>>codertarget.arduinobase.registry.setBaudRate('ArduinoTest',153660)

For checking Boud Rate you can wrinte im promp

>>codertarget.arduinobase.registry.setBaudRate('ArduinoTest')

After that you can try to play your Clone Arduino Made in China in External Mode.

Thanks a lot

Answer 8

[Anshuman Deshpande]

In my case for Arduino Uno, it worked with--> codertarget.arduinobase.registry.setBaudRate(gcs,153660)

Answer 9

[Md Ohirul Qays]

Matlab 2018b interfaced with Arduino 2560 performed the command line successfully.

>> codertarget.arduinobase.registry.setBaudRate('ModelName',153600)

Nextly, the another baud rate 9600 is followed properly as well.

[Vicky Jaiswal]

Unable to resolve the name 'codertarget.arduinobase.registry.setBaudRate'.

I'm getting this error when I tried to run "codertarget.arduinobase.registry.setBaudRate('ModelName',153600)" on command window, with modelname "vdp". Even i tried many modelnames, bu its not woking.

Answer 10

[Angel Casas]

Gracias a todos por sus comentarios. Tengo un Arduino NANO (clon) y me funcionó con 230400 baudios.

Answer 11

[Jerald Prado]

im using matlab2020, i can't resolve using the mentioned workaround. anyone encountered the same?

[Todor Medarov]

Yes, I am having the same problems. I am using matlab2021a, and tried everything mentioned above with no results..

Did you manage to fix this problem somehow ?

Answer 12

[Annashree Nivethitha S]

I am using matlab R2023a and getting the below error while trying to connect arduino nano in matlab simulink

"Error:The following error was encountered during evaluation of the external mode callback 'getExtModeData': codertarget.arduinobase.internal.getExternalModeMexArgs('Serial')

Failed to detect host COM port of Nano 33 IoT board.

Install or update the Arduino board driver and try again.

If the problem still persists, enter the host COM port number manually in the 'Configuration Parameters > Target hardware resources > Host-board connection' and try again.

Please someone suggest a solution should I change matlab version?