Check two string data without carriage return symbol

Hi all!

In the serial com port channel values comes from 0 to 1023, this example from Arduino: https://monosnap.com/file/TiTehc6zWhu0zszPnCALbnjIMAfpzf

On the MATLAB side I parse it via function:

while(obj1.BytesAvailable)
  Psvoltage =  deblank(fscanf(obj1)) %, '%d', 4)
    [a, b] = size(Psvoltage)
    bb = findstr(Psvoltage, '\r')
    if ~isempty(Psvoltage)
        sPs = str2num(Psvoltage) * (100 / 1023); %
        break;
    end
end

But sometimes from serial port I take corrupted data like this: https://monosnap.com/file/ysJFdabTbOVOKoQbgqJYF44SioAORy

And it is cause error in my program:

https://monosnap.com/file/oEJlyjnifsTx6h531xfDi23nQ89Shv

https://monosnap.com/file/6fdI8mgQa6pVjKn2EHFqzXdQnDDLzb

This is two string data, but without carriage return symbol, because all checking such as: ~isnan(), ~isempty() and findstr(Psvoltage, '\r') this data had been passed.

The question is: how do I check these data would be to ignore them?

Thank you!

Answer 1

[Ced]

Why not just take the first row?

I.e.

Psvoltage =  deblank(fscanf(obj1)) %, '%d', 4)
if ( ~isempty(Psvoltage) ) 
  Psvoltage = Psvoltage(1,:);
end

edit: added ~isempty check

[Sergey Makovkin]

I tried you case, but it dont solve my problem with corrupted data. This is the code: https://monosnap.com/file/qgg8o3x6aQ2rbs6AtFpGsNh5LEtXZO

This is corrupted case with errors: https://monosnap.com/file/rAr5kgsKK2OAtVCKLNKiXL995Gffzb

[Ced]

How about

Psvoltage =  deblank(fscanf(obj1)) %, '%d', 4)
if ( ~isempty(Psvoltage) ) 
  volt_num = str2num(Psvoltage);
  Psvoltage = volt_num(1);
end

?

or simply < removed, did not work >, see Sergey's answer below.

Answer 2

[Sergey Makovkin]

Thank you very much! First variant is working correctly, but second is not (please see the 2nd result: https://monosnap.com/file/6XxSZBS1pNI2AcPHIZNSq3n4SCSPJD)

I have another hard question about serial port :) Here is it: http://www.mathworks.com/matlabcentral/answers/275418-get-only-numbers-from-serial-port-without-any-str2num-conversion

[Ced]

Interesting, thanks for testing them out!