how to send a single integer value from Matlab to arduino?

I want to send it via Serial Communication

Answer 1

[Ashitha Nair]

Your matlab code could be as follows

s = serial('COM8','BaudRate',9600);  %creates a serial object
  flushinput(s) %this discards all previous s values 
 fopen(s);
 fwrite(s,255); % allows you to send a single int here, I'm sending 255
 

This should be paired with a read method, in your arduino IDE. Make sure that you type in the correct COM port and baud rate. Baud rate should be the same (in your serial object as well as the arduino).