hex to 32bit float

Hey there,

i communicate with a device by sending and receiving hexadecimal strings.

for example: by sending the command 01 04 00 00 00 02 71 CB I receive 01 04 04 3E A8 53 96 CB 12

Now I need to translate that into a number. In this case it should be 0,3287627

I have a demoprogramm which is working, but I can't comprehend how.

So my problem is to translate that hex number into 32bit float

    --> demoprogramm

    --> my version

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