A simple Python script to receive messages from a client over Bluetooth using Python sockets (with Python 3.3 or above).

socketServer.py

"""
A simple Python script to receive messages from a client over 
Bluetooth using Python sockets (with Python 3.3 or above). 
"""

import socket

hostMACAddress = '00:1f:e1:dd:08:3d' # The MAC address of a Bluetooth adapter on the server. The server might have multiple Bluetooth adapters. 
port = 3   # 3 is an arbitrary choice. However, it must match the port used by the client.  
backlog = 1
size = 1024
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
s.bind((hostMACAddress,port))
s.listen(backlog)
try:
	client, address = s.accept()
	while 1:
		data = client.recv(size)
		if data:
			print(data)
			client.send(data)
except:	
	print("Closing socket")				
	client.close() 
	s.close()

Hi, maxcoldson and mitjad,
Well, people say there is the same available for python3.9. I don't know about it. But you can check.

I can definately tell you from doing it myself that python 3.9 is the solution.