Interfacing Arduino Uno with MATLAB

Method-1:

Step-1: Download the ArduinoIO MATLAB support file from here 

Step-2: Download the Source file from here 

Step-3: Add the downloaded ArduinoIO folder to your MATLAB bin path 

in my case it is "C:\Program Files\MATLAB\R2012a\bin"

Step-4: Connect your Arduino board to your PC/Laptop

Step-5: Open Arduino IDE Tool and copy the downloaded source file on to the new sketch file. Compile it and upload it on to the Arduino Uno board.

Step-6: Now Open your MATLAB and type "arduino" on command prompt. You will see some scrolling message. Then type "a=arduino('COMx'), x is your COM port number which is assigned to your board. 

Step-7: If you want to read analog port data then type "b=a.analogRead(0)" this will read analog port A0 data. If you want read/write any digital pin use these instructions

 a.pinMode(9,'input'); 

 a.pinMode(13,'output');

 a.digitalwrite(13,0) ;

arduino;

a=arduino('COM3'); // In my case it is connected to COM3 port

t=1:1:100;

b=a.analogRead(0);

plot(b);

a.pinMode(8,'input');

a.digitalRead(8);

a.pinMode(13,'output');

a.digitalWrite(13,1);

pause(1)

a.digitalWrite(13,0);

Method-2:

Step-1: Write this code in Arduino IDE tool and upload this code on to your board. 

void setup()

{

   Serial.begin(9600);

  while (!Serial) {

      ; // wait for serial port to connect. Needed for Leonardo only

    }

}

void loop()

{

  Serial.print("Hello World!");

 // Write your code here

}

Step-2: Open MATLAB and type this code in matlab file and run the code

s = serial('COM3'); // In my case it is connected to COM3 port

fopen(s);

fprintf(s, 'Your serial data goes here');

out = fscanf(s);

% Data Analysis 

fclose(s);

delete(s);

clear s;