Matlab code for data collection from Neurosky Mindwave Mobile EEG headset

eeg.m

%clear everything before loading
clc;
clear ALL;
pause on;
%loading dll library, header file and other libraries
%(libfunctionsview thinkgear to view dll)
if ~libisloaded('Thinkgear')
    loadlibrary('Thinkgear.dll');
else
    unloadlibrary Thinkgear
    loadlibrary('Thinkgear.dll');
end
disp('libraries loaded successfully.')

path = 'E:/StartInnovating/Projects/1_Neurosky_robot_control_EEG/Matlab_Code/';

%to compute data of 14 columns
data = ones(61440,14);
portnum1 = 7;   %COM Port #
comPortName1 = sprintf('\\\\.\\COM%d', portnum1);

% Baud rate for use with TG_Connect() and TG_SetBaudrate().
TG_BAUD_115200 =      115200;

% Data format for use with TG_Connect() and TG_SetDataFormat().
TG_STREAM_PACKETS =     0;

% Data type that can be requested from TG_GetValue().
TG_DATA_POOR_SIGNAL =     1;
TG_DATA_ATTENTION =       2;
TG_DATA_MEDITATION =      3;
TG_DATA_RAW =             4;
TG_DATA_DELTA =           5;
TG_DATA_THETA =           6;
TG_DATA_ALPHA1 =          7;
TG_DATA_ALPHA2 =          8;
TG_DATA_BETA1 =           9;
TG_DATA_BETA2 =          10;
TG_DATA_GAMMA1 =         11;
TG_DATA_GAMMA2 =         12;
TG_DATA_BLINK_STRENGTH = 37;

% Get a connection ID handle to ThinkGear
connectionId1 = calllib('Thinkgear', 'TG_GetNewConnectionId');
if ( connectionId1 < 0 )
  calllib('Thinkgear', 'TG_FreeConnection', connectionId1 );
  error(sprintf( 'ERROR: TG_GetNewConnectionId() returned %d.\n' , connectionId1 ));
end

% Attempt to connect the connection ID handle to serial port "COM8"
errCode = calllib('Thinkgear', 'TG_Connect', connectionId1,comPortName1,TG_BAUD_115200,TG_STREAM_PACKETS );
if ( errCode < 0 )
    calllib('Thinkgear', 'TG_FreeConnection', connectionId1 );
    error(sprintf('ERROR: TG_Connect() returned %d.\n' , errCode) );
end


%recording data
fprintf( 'Connected.  Reading Packets...\n' );
for i=1:120   %loop for 120 seconds
  if (calllib('Thinkgear','TG_ReadPackets',connectionId1,1) == 1)   %if a   packet was read...
      for j=1:14         
        if(j == 1)
            data(i,j) = now;
        end
        if(j == 2)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_POOR_SIGNAL) ~= 0)   %if RAW has been updated 
            data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_POOR_SIGNAL);
            end
        end
        if(j == 3)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_ATTENTION) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_ATTENTION);
            end
        end
        if(j == 4)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_MEDITATION) ~= 0) 
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_MEDITATION);
            end
        end
        if(j == 5)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_RAW) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_RAW);
            end
        end
        if(j == 6)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_DELTA) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_DELTA);
            end
        end
        if(j == 7)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_THETA) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_THETA);
            end
        end
        if(j == 8)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_ALPHA1) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_ALPHA1);
            end
        end
        if(j == 9)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_ALPHA2) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_ALPHA2);
            end
        end
        if(j == 10)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_BETA1) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_BETA1);
            end
        end
        if(j == 11)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_BETA2) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_BETA2);
            end
        end
        if(j == 12)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_GAMMA1) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_GAMMA1);
            end
        end
        if(j == 13)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_GAMMA2) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_GAMMA2);
            end
        end
        if(j == 14)
            if (calllib('Thinkgear','TG_GetValueStatus',connectionId1,TG_DATA_BLINK_STRENGTH) ~= 0)
                data(i,j) = calllib('Thinkgear','TG_GetValue',connectionId1,TG_DATA_BLINK_STRENGTH);
            end
        end
     end
  end
  pause(1)
end
fprintf( 'Completed reading data.\n' );

%save data to csv file
csvwrite(path + 'data.csv',data);
dlmwrite(path + 'data.csv',data,'precision', '%.6f');

% disconnect             
calllib('Thinkgear', 'TG_FreeConnection', connectionId1 );
 

http://sendanywhe.re/LLY7JPPG

You can use the above link to download the DLL files. I am sure you will find the same one from developer documentation of Neurosky.

hello sir i need to ask about this path line
on line 15 if i paste this code on matlab what path i need to write there ?
i am making wheelchair using mindwave mobile and i need blink strength data

you can write any location there. The processed data will be saved in this path.

@MexsonFernandes, Perfect! thanks for the file and details. Works fine now.
I have one last query. Does this code work for "Neurosky mind wave mobile 2" headsets?
Because I am getting all empty data.

It does for Neurosky Mind Wave Mobile 2 headset. You can refer below repository. Although it's not well documented, you can still refer to some code.

https://github.com/MexsonFernandes/EEG-controlled-Robot-using-Neurosky-Mindwave-Mobile2

@MexsonFernandes, Perfect! thanks for the file and details. Works fine now.
I have one last query. Does this code work for "Neurosky mind wave mobile 2" headsets?
Because I am getting all empty data.

https://gist.github.com/MexsonFernandes/c08ad378e7cad5c98b5c2dc912797dc1 Refer this gist as well.

Good night, I need some help with code, please, if you can tell me how I can to increase of data number for second that the code can to capture.

hello sir
I faced a problem every time run project it is ...

Error using eeg (line 54)
ERROR: TG_Connect() returned -2.

can you help me, please?

http://sendanywhe.re/LLY7JPPG

You can use the above link to download the DLL files. I am sure you will find the same one from developer documentation of Neurosky.

sorry , can you please send this link again? ...it isn't available.

Sir Can I get some help ?

there are some issues for which I can't execute the code. Is there any way to solve this without installing 32-bit Matlab?

@urmi2927 your only problem is that your are using wrong library. Use the correct one and it will work