We've had someone work with MatLab in the past: https://synthiam.com/Community/Questions/1185

Its the EZ-SDK you would use, not ARC. ARC is a standalone graphical control software. You can watch a video about the difference between EZ-SDK and ARC by pressing the DOWNLOADS button on the top of this webpage

Oh, I hadn't realized the SDK manual was online only. I could only find the down loadable one for the ARC.

Thanks!

OK, I've had a read of the SDK manual and come to the realization that my programming skills are not good enough for me to understand my problem.

I'll try to explain the problem I'm having in more detail.

Using MatLab I can connect to the board (the Bluetooth light stops flashing). However, when I send commands over Bluetooth nothing happens. My commands are formatted as shown below, with ezb being the Matlab reference for the board.

fprintf(ezb,'Servo.SetServoPosition(Servo.ServoPortEnum.D0,60)')

The fprintf command is a Matlab function to print to a file (or in this case the board I think).

I know something is happening as the main data LED stops flashing while this command is set, but the servo doesn't move. After a few minutes the data LED starts flashing again.

I know fprintf works over Bluetooth as I can communicate with and control a distance laser sensor using the same format. Thus, I know I've missed something in the connecting stage or command syntax stage.

I'd really appreciate your thoughts on where I've gone wrong! Thanks!

You might want to see the Python scripts I have posted (search for 'Python' on these boards). Given the similarity of Python and Matlab, it might give you some more pointers. You need to send a command to the board regularly, otherwise it disconnects. Here is my Wait() function in Python, which gets used whenever the EZ-B is doing nothing:

def wait(my_ezb,seconds): --from time import sleep --seconds = int(seconds) --for i in xrange(seconds): ----for j in xrange(10): ------#regularly send a command to the board to keep it connected ------my_ezb.Uart.SendSerial(my_ezb.Digital.DigitalPortEnum.D1, my_ezb.Uart.BAUD_RATE_ENUM.Baud_57600, "1") ------sleep(0.1)

(indents shown as '--')

Thanks, I'll look into this. I didn't realize that the board needed to be in constant communication. Just curious, but why does the Bluetooth light stay on constantly if the board disconnects?

This next question will probably show my ignorance, but what is the EZ_Builder actually sending to the board over bluetooth when servo D0 is told to move to position 70. i.e: Servo(D0,70)

I'm just trying to work out why my commands are being received (as the LED stops flashing), but nothing happens.

@dalex: Thanks for your input, but I don't seem to be able to use your tip correctly. I've tried making a script that fires commands at the board constantly, but I get the same results. I think my problem is I don't know how to speak to the board in a way it understands.

My suggestion is to pick up a Matlab programming book or see if your local schools offer a basic intro to programming. Fprintf merely sends a string of text to a file handle, which may be a Bluetooth connection. What you need to do is import the ezsdk as a COM object and use the functions.

This might help: http://www.mathworks.com/help/matlab/matlab_external/exploring-your-object.html

Ok, I guess this will take longer then I was planning. I'll need to work out how to load the board dll files into MatLab. Thanks for your advice.