fscanf warning message

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Shawn Chang 2012-6-22

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评论： Walter Roberson 2019-7-16

Hi, I am using serial port communication. I can write and read the data but the warning after "fscanf" keep pop up. Below attached the code. Code:

    s=serial('COM6','BaudRate',115200,'Parity','none'...
         ,'DataBits',8,'FlowControl','none'...
         ,'Terminator','LF/CR');
    fopen(s);
    fprintf(s,'t');
    out = fscanf(s)

Warning: A timeout occurred before the Terminator was reached.

May i know what is the problem?

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Abhirama B A 2019-7-16

I am also having the same problem even after using the code

set(s, 'TimeOut', 100)

can you help to get rid of this?

Walter Roberson 2019-7-16

Check the baud rate you are configuring.

Check that the terminator matches.

Use a program such as TeraTerm to verify that you are able to receive data from the port.

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采纳的回答

Jan 2012-6-22

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在 MATLAB Online 中打开

If the timeout occurred to early, what about increasing the time?

set(s, 'TimeOut', 100)

? But the default of 10 seconds should be long enough... Perhaps the other parameters are not correct?

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Shawn Chang 2012-6-28

Thanks Jan and Walter replied, now I know how the stuff is worked.

wenshuo dong 2018-8-1

Can you tell me what is the problem? how can I figure it out? I meet the same issue as yours. Thanks!

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