How can I connect 2 nodes and send data over them using python sockets?

Question

I have a python script which creates a variable heading . I want to transmit this heading to another node in a wireless ad-hoc network.

I have looked at a lot of tutorials and examples but I don't quite understand which end is which for the sockets.

I think on the node I have created the variable I would have code something like this:

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.connect((ipv4_address, 50086))
s.send(heading)

And on the receiving end I would want something listening on the same port waiting for the heading to arrive:

s = socket.socket(socket.AF_INET, socket.SOCK_STREAM) 
s.bind((ipv4_address, 50086))
while 1:
    data = client_socket.recv(512)

I'm not sure if I am getting the connect and bind the right way around?

Answer 1

• The server part must perform the sequence socket() , bind() , listen() , accept() . Your server part currently doesn't listen to a socket and doesn't accept connections. Also the server part should recv data from the socket returned by accept , but not the one that you're listening to.
• You need to ensure that heading variable is a string. Otherwise you might want to use JSON or pickle module to serialize your objects.

I'd suggest you to read the socket module examples at official Python documentation.