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I am sending a UDP-packet in double data type to a RaspberryPi via Simulink. I want to decode the UDP-packet with the following code:

import struct
import socket

sock = socket.socket(socket.AF_INET,socket.SOCK_GRAM)

sock.bind(("",5002))

data,addr= sock.recvfrom(1024)
struct.unpack('d','data')
print data

and I receive the following error:

struct.error: unpack requires a string argument of length 8

thanks in advance for any help!

PyschoAndreas
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1 Answers1

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You have to check if you are sending big endian or little endian. you can add '<' for little endian and '>' for big endian data. Depends on how many variables you are receiving, the number of 'd' should increase as well. let's say you are receiving 2 struct.unpack('<'+'d','data')

Messi
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