fscanf warning message

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?

[Abhirama B A]

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]

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.

Answer 1

[Jan]

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?

[Walter Roberson]

In particular double-check the terminator.

[Shawn Chang]

Hi, thanks for replied. After i set the time out to 100,and check the terminator, the warning still exist. Does the warning will affect thereceiving data?

[Walter Roberson]

The warning might be indicating that you are not getting any data at all.

If you are getting data then the timeout will be slowing down your program a lot.

[Shawn Chang]

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

[wenshuo dong]

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