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How to use the Arduino with MATALB software

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Louis Swaby
Louis Swaby 2021-5-28
回答： Florian 2023-3-6
I installed the MATLAB support package for Arduino Hardware but am unable to communicate with my arduino Uno. When setting up the board it says that the connection is good. However, when I try to use the example code below it does not work.
a = arduino();
I get the following error:
No constructor 'string' with matching signature found.
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回答（3 个）

Florian
Florian 2023-3-6
Hi, as I had the same issue with my 2022b instalation, maybe my solution will help someone.
instead the non working
a = arduino()
use auto suggestion after the first bracket (TAB ) to input something like:
a = arduino("/dev/cu.usbmodem144301","Nano33IoT") %the pink stuff should be different for you
And now, at least for me, there is no error message
Walter Roberson
Walter Roberson 2021-5-28
Which MATLAB release are you using?
What shows up for
which -all String
which -all string
The error message you are getting most commonly occurs when you are using a file system that is not case sensitive (NTFS and Apple HFS+ by default are not case sensitive), and you have a function defined with the other cases than the class you are trying to invoke. So in this case, if you had a String.m on your MATLAB path that was earlier than MATLAB's @string folder, then the String.m might get matched because the file system is not case sensitive, but then MATLAB internally compares the String name to the desired string and sees they are different and gives the error message you indicated.
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Dylan McSweeney
Dylan McSweeney 2022-10-14
>> a = arduino();
No constructor 'string' with matching signature found.
>> which -all String
/Applications/MATLAB_R2022b.app/toolbox/matlab/strfun/@string/string.m % string constructor
/Applications/MATLAB_R2022b.app/toolbox/matlab/datatypes/@opaque/string.m % opaque method
/Applications/MATLAB_R2022b.app/toolbox/matlab/bigdata/@tall/string.m % tall method
/Applications/MATLAB_R2022b.app/toolbox/matlab/codetools/@mtree/string.m % mtree method
/Applications/MATLAB_R2022b.app/toolbox/matlab/datatypes/categorical/@categorical/string.m % categorical method
>>
>> dbstop if caught error
>> a = arduino()
Caught-error breakpoint was hit in base>base.addprop at line 0. The error was:
'dhardwareInstance' is already defined as a property.
In workspace belonging to arduino
K>>

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Zoltán
Zoltán 2022-10-7
Same for me, seems to be an Apple Monterey problem.

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