MATLAB: How to convert 8 bytes to a double value

Question

Hi,

Matlab script takes values from an udp server. Server respond contains 8 bytes so it is needed to convert this 8 bytes to an double value in matlab script.

My script:

u = udp('127.0.0.1', 49012, 'LocalPort', 85);
fopen(u);
fprintf(u,"request");
data = fread(u); % reads 8 bytes
data = typecast(str2num(sprintf('%d%d%d%d%d%d%d%d',data(1),data(2),data(3),data(4),data(5),data(6),data(7),data(8))), 'double');
disp(data)

for example its received data is as follows:

147, 190, 144, 143, 145, 126, 68, 64

It is converted to double as

1.4719e+21

but orginal value is about to 41

Note: There is no problem in server. I tested it using C# and received correct results.

Note: Reading value as double was tried like as follows:

fread(u, size, 'double')

However, this method does not make any difference.

Answer 1

>> typecast(uint8([147, 190, 144, 143, 145, 126, 68, 64]),'double')
ans =
   40.9888