Matlab serial port opening arduino

Hello

I am trying to get a program to open the serial port to access an arduino with sensors attached. It seems to only want to run about 1/6th of the time and only every other day. When it doesnt work, it gives the warning: Unsuccessful read: A timeout occurred before the Terminator was reached. Is there a way to get it to run more consistently?

Here is the part of the code that is causing in the issue:

function initializeSerial()
global serial_;
global baud_rate_;
global size_data_array_;

disp('Initializing serial communication...')
set(serial_,'Baudrate',baud_rate_);
set(serial_,'DataBits', 8);
set(serial_,'StopBits', 1);
fopen(serial_)
serial_.ReadAsyncMode = 'continuous';

disp('Waiting for serial to come online...');
pause(3); % make sure arduino boots up if reset on connection

count = 0;
for i=1:10
    serial_line = fscanf(serial_, '%s')
end

while length(serial_line) <= 1 % test to make sure lines are being read
    serial_line = fscanf(serial_,'%s')
    count = count + 1;
    if count > 1000
       disp('Cannot connect to serial port... exiting');
       return
    end
end
% get size of data array
size_data_array_ = size(eval([ '[', serial_line, ']' ]),2);

end

Here are the variables and parameters:

%***** GLOBAL VARIABLES *****%
global serial_;             % controlls serial communications
global baud_rate_;          % baud rate for serial communication
global num_readings_;       % the number of sensor readings to take for each data point
global num_data_pts_;       % the number of data points that will be collected in each trial
global size_data_array_;    % the size of the data array coming over serial
global data_;               % the variable that holds the collected data

%***** TEST PARAMETERS *****%
serial_ = serial('/dev/ttyACM0'); 
baud_rate_ = 115200;
num_readings_ = 10; 
num_data_pts_ = 2;
num_trials_ = 10;

Answer 1

[Vinod]

Any reason you aren't using the Arduino IO Support Package?