MATLAB: Receive serial data in Hex

Question

I wanted to write data received from serial port in text file. I want received data in the form

 40 00 20 00 10 00 08 00 00 0A 0F 0D 10

but i am getting data in the test file as 40 0 20 0 10 0 8 0 0 A F D 10.

Please tell me what should i use to get data as i received.

I am using following code

Rcvd = fread(serConn,45000,'char');     
hexpass=sprintf(num2str('%3X', Rcvd)); 
 header1 = '';
 file_id=fopen('MyFile.txt','w');
 fprintf(file_id,[header1 '\n']);
 fprintf(file_id,'%s',hexpass);

Please suggest me to get the data in txt file as

 40 00 20 00 10 00 08 00 00 0A 0F 0D 10

Thanks in adavance

Answer 1

hexpass = num2str(Rcvd, '%02X ');
hexpass(end) = '';    %get rid of trailing space