Real Time data from matlab to arduino

hello, i have a some project eeg, and i was sending real time data in matlab and i want to send that to arduino uno, maybe somebody help me, thanks

[Walter Roberson]

How are you getting the eeg data into the MATLAB host?

Could you confirm that you want to send the raw eeg data to the arduino, without analyzing it (for example to send motor commands to the arduino)?

What data rate do you need, and what latency is acceptable?

[Gabriel Enzo]

i get the eeg data using the streaming layer lab in matlab, then finally out the existing serial data so i have to send it to arduino to drive the motor, for data speed and latency may not be needed which is too fast

Answer 1

[Walter Roberson]

If you look at https://github.com/labstreaminglayer/liblsl-Matlab/blob/master/examples/ReceiveData.m

where it has

while true
    % get data from the inlet
    [vec,ts] = inlet.pull_sample();
    % and display it
    fprintf('%.2f\t',vec);
    fprintf('%.5f\n',ts);
end

you would change the fprintf() calls to

msg = compose('%.2f\n%.5f', vec, ts);  %adjust this format as needed
writeline(s, msg);

where

s = serialport('COM3');   %where COM3 is the location of the serial port connected to the arduino

You would be expected to have a program running on the arduino that reads from the serial port and reads two items, the first being vec and the second being ts, and does something appropriate with the readings.

If you are planning to run a motor, then typically instead of sending the raw eeg data, you would analyze the data at the MATLAB level and then send commands to the arduino.

Alternately, if you can use a Due or Mega, then https://www.starcat.io/ makes an EEG shield that can directly receive Lab Streaming Layer on the Due or Mega, without going through MATLAB.

[Gabriel Enzo]

oh okey will try that

[Gabriel Enzo]

thank you