A timeout occurred before the Terminator was reached. first

ok this is my code

s=serial('com5');
set(s,'BaudRate',9600,'DataBits', 8, 'Parity', 'none','StopBits', 1, 'FlowControl', 'none','Terminator','CR');

fopen(s);

while(1)  

    fprintf(s,'0');
    pause(0.5);
    data=fscanf(s);
    data=str2num(data);
    display(data);
    if(data<=10)                   
            fprintf(s,'1');
            pause(0.5);
            fprintf(s,'2'); 
            pause(0.5);
            fprintf(s,'3');            
            pause(0.5);

             fprintf(s,'0');
            pause(0.5);
            data=fscanf(s);
            data=str2num(data);
            display('first');

            i=0;
            if(data<=10)
                fprintf(s,'2');
                pause(0.5);
                i=i+1;
            end  
            display('second');              
    end
end

fprintf(s,''1') fprintf(s,''2') fprintf(s,''3') are just commands sending in one direction so no returned data is excepted

fprintf(s,''0') sends a command to a roboter to use his pingsenzor the roboter returns a value stored in data(by the way the returned data from the roboter is [DEC distance, CR] -dec meaning decimal ,distance - variable,CR - terminator)

if the returned value is <10 then try to avoid the object.When i use a second time fprintf(s,'0') i always get the message

Warning: A timeout occurred before the Terminator was reached. first last

so why does this always appears the second time and how to avoid it.

[Hoang Nguyen]

I had the same your error when arduino uno was interfacing with matlab :(. I don't know how to solve this problem

Answer 1

[samir]

ok i put an puase (2) before fprintf(s,'0'); and it works now wihtout the error.Don't know why it works now or why it didn't work earlier but at least it works now

Answer 2

[Hoang Nguyen]

hi every body! i used "Encoder Read" block in simulink to read value encoder of my motor. but if my motor operate with hight speed then following error occurred: "Error evaluating registered method 'Outputs' of MATLAB S-Function 'msfun_arduino_encoderread' in 'DaoChieuDongCo/Encoder Read'. The following is the MATLAB call stack (file names and line numbers) that produced this error: ['C:\MATLAB\SupportPackages\R2013b\ArduinoIO\simulink\msfun_arduino_encoderread.m'] [100]

Caused by: Invalid assignment in 'DaoChieuDongCo/Encoder Read': attempt to assign a matrix to a vector" so, how do i solve this error?

[Waldri]

In my case I change the baud rate in arduino to 500000

[kiarash]

Hi,

Please check the help of "baudrate". Maximum allowed value I think was 115200.