Comments on: Arduino to Matlab – Read in sensor data!

By: fremond

fremond — Sun, 03 Apr 2011 05:51:30 +0000

can someone teach me how to program the arduino to receive data from two potentiometer and plot them using matlab??

By: fremond

fremond — Sat, 02 Apr 2011 05:40:27 +0000

hi..thanks for the source code..

can i ask is there any permanent solution that we do not need to close off matlab everytime after we obtain the sensor data from arduino to matlab?

By: Erin, the RobotGrrl

Erin, the RobotGrrl — Wed, 23 Mar 2011 22:23:11 +0000

Thanks Dustyn! I think my friend got the serial port to be able to close by declaring the port as a global variable (in that big window in the middle when you start MATLAB), and using that variable name throughout the code. It was a weird solution though, and only worked sometimes.

I did indeed see that, but I wrote the above code before the Arduino toolkit came out hahaha ;D

Thanks for the comment, Giampy!

By: Giampy

Giampy — Wed, 23 Mar 2011 22:13:15 +0000

By the way, there is a free Matlab interface to Arduino, which you can download from here:

http://www.mathworks.com/academia/arduino-software/arduino-matlab.html

This lets you control your Arduino board over USB from a MATLAB session, in either Windows, Mac or Linux. For example you can instantiate an Arduino object from MATLAB using:

>> a=arduino(‘COM5′);

and then do stuff like:

>> av=a.analogRead(5);
>> a.pinMode(13,’output’);
>> a.digitalWrite(13,1);
>> delete(a)

By: Dustyn Roberts

Dustyn Roberts — Wed, 23 Mar 2011 21:46:12 +0000

Thanks for that! Now if I can only figure out a way to close the serial port without turning off Matlab…

Also have you seen this?
http://www.mathworks.com/matlabcentral/fileexchange/27843

Have you ever tried 2-way communication, like controlling a motor while logging sensor data in Matlab?

By: fremond

fremond — Fri, 18 Mar 2011 15:43:20 +0000

hello erin,

i wish to ask how something..since i have connected my potentiometer to arduino board..does the code you share here can read the data from the potentiometer and plot graph?

By: fremond

fremond — Mon, 14 Mar 2011 14:28:56 +0000

hello Erin,

you are a lifesaver..i am so glad i found this website..i got a few things that i wish you can help me with..

1st) while i executed the matlab code this error came out:

??? Undefined function or method ‘training’ for input
arguments of type ‘char’.

may i ask for your help to enlighten me?

i am really a newbie in matlab and also arduino..hope that someone can help me..

By: Nuclearrambo

Nuclearrambo — Fri, 17 Dec 2010 06:10:24 +0000

EXCELLENT ….you came to my rescue while i am building my pulse oximeter

Thank you very much.

By: wwn

wwn — Mon, 13 Dec 2010 03:43:32 +0000

ihad error like this ??? Error: File: Serial.m Line: 45 Column: 1
Illegal use of reserved keyword “catch”.??? Error: File: Serial.m Line: 45 Column: 1
Illegal use of reserved keyword “catch”.
can anyone help me?

By: SAMMOR

SAMMOR — Tue, 05 Oct 2010 07:46:30 +0000

Hey Erin,
Thank you for the code. Exactly what i need to build my signature verification project. Arduino to matlab communication
I’ll let you know of my progress.
Sam