Hello, I wonder method get the information about ISF_CON packet using the matlab.

I used this post "Quick and Dirty MATLAB code for live position/speed/head"
"https://www.lfs.net/forum/post/1683094#post1683094"

I changed the flags in IS_ISI

fwrite(t,[44 1 0 0 0 0 64 0 0 0 40 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 'new2' 0 0 0 0 0 0 0 0 0 0 0 0]);

and I read data using 'fread(t,40)'

But, I couldn't get the information with next error

"Unsuccessful read: The specified amount of data was not returned within the Timeout period.
Empty matrix 1x0"

I want to get the information about steer, speed, longitudinal acceleration and lateral acceleration.

Help me please..