Undefined function 'readVoltage' for input arguments of type 'arduino'.

I have a proper connection between MATLAB and an Arduino (Uno) board. When I first installed Arduino Package in MATLAB I was able to receive a signal from an analog pin on my Arduino board using readVoltage() function. However, after installing ArduinoIO package to add the so-called 'Arduino IO library' library in Simulink browser, I have started to get the following error every time I use the statement, say, readVoltage(a, 'A5'):

Undefined function 'readVoltage' for input arguments of type 'arduino'.

Just for info, I assign a new Arduino object beforehand by typing

a = arduino()

Nothing is really happening though. Any help is appreciated.

Answer 1

[Madhu Govindarajan]

After you have established the communication with Arduino using a=arduino, could you type methods(a) and post the results here?

[Aydin Nasirzadeh]

Madhu Govindarajan.

Thank you so much for your consideration.

But I just 'solved' the given problem. As I mentioned above, I had downloaded a new package for Simulink which was located in the space as MATLAB's necessary package to make an interface with Arduino board. Then I removed ArduinoIO package (Simulink package). Guess what? It worked properly, i.e., my MATLAB had a proper interface with my Arduino board.

Probably, there was a traffic between two packages when "arduino" command was called. And maybe not. No matter what the problem was, I can have an interface between MATLAB and an Arduino board.

Thank you again ^_^.

[Ricardo Ramirez]

So you just erased the packaged you installed? I got the same problem, and don't know what to do about it :(

[Madhu Govindarajan]

@Ricardo - I guess all Aydin is saying - have only MATLAB Support package for Arduino and Simulink Support package for Arduino and this issue does not happen.