MATLAB is not great for communicating with Ardiuno real time, if I remember 50 Hz is pushing the bounderies. A couple things you can try to speed up your program:
- Change Baud rate to 115200
- Send data as bytes (Serial.write instead of Serial.print, depending on your data on the Ardiuno side you might need to cast the values)
- Try sampling 100 or 1000 values and calculate the average sample rate. Sometimes acquiring the first data point is slower then the rest espcially if you have anything in your void setup.
- Have you installed the hardware support packages for MATLAB or Simulink?
Not sure if you have written a real time plotting function so thought I would also include this for you:
function [] = realTimePlotter()
% Set up figure, get properties, and label
figure
h = animatedline;
ax = gca;
ax.YLim = [0 5];
xlabel('Time (s)')
ylabel('Output Y [units]')
% Start a timer
tic
startTime = toc;
% Loop for 20 secounds
while toc < 20
% Random data
v = randi(4);
% Get current time and add to animation
t = toc - startTime;
addpoints(h,t,v)
% Update axes
if t < 5
ax.XLim = [0 10];
drawnow
else
ax.XLim = [t-5 t+5];
drawnow
end
end
