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Serial Communication App Designer

조회 수: 8 (최근 30일)
Criss2112
Criss2112 2020년 5월 12일
댓글: Criss2112 2020년 5월 20일
Hello! I m quite new in App Designer so I m gonna ask for your help. I need to open a serial communication with my Arduino. I have some erros though and I cannot understand why:
delete(instrfind)
arduinoo =arduino('COM6');
arduinoo=serial('COM6');
set(arduinoo, 'BaudRate', 115200);
arduinoo.Terminator = 'CR';
y=zeros(1);
s11=zeros(1);
s12=zeros(1);
s13=zeros(1);
s14=zeros(1);
i=1;
l2=0;
arduinoo.BytesAvailableFcnCount = 40;
arduinoo.BytesAvailableFcnMode = 'byte';
arduinoo.BytesAvailableFcn = @instrcallback;
fopen(arduinoo);
if isvalid(arduinoo)
tstart=now();
while 1<2
data=fscanf(arduinoo);
if real(str2double(data))< 5 & real(str2double(data)) >1.75
l2 = (now()-tstart)*24*60*60;
for j=1:1000
data=fscanf(arduinoo);
y(i+j)=real(str2ouble(data));
app.sa = 'DA';
end
break;
end
fclose(arduinoo);
delete(instrfind);
end
Here is my error:
Error using serial/fscanf (line 153)
Unsuccessful read: Instrument object OBJ is an invalid
object..
data=fscanf(arduinoo);
Error using matlab.ui.control.internal.controller.ComponentController/executeUserCallback (line 309)
Error while evaluating Button PrivateButtonPushedFcn.
Thank you in advance for any help!

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Harsha Priya Daggubati
Harsha Priya Daggubati 2020년 5월 15일
Hi,
I guess the issue is with arduinoo object you are creating, which I can infer is invalid. Can you try deleting and clearing the object from the workspace/memory and re-run your code.
You can refer the following documentation links for more help.
Hope this helps!
  댓글 수: 5
Harsha Priya Daggubati
Harsha Priya Daggubati 2020년 5월 20일
편집: Harsha Priya Daggubati 2020년 5월 20일
Also, make sure that the port number to which arduino is connected is same as that mentioned in your script, and baud rate is the same.
Have a look at this published File Exchange submission:
Criss2112
Criss2112 2020년 5월 20일
Yes, it s the same. Com6 and 115200 the baudrate.It works perfectly fine in matlab script when running

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