server.py

import bluetooth

# host machine bluetooth mac address
bt_mac_address = "74:E5:F9:97:F8:E1"
server_sock = bluetooth.BluetoothSocket(bluetooth.RFCOMM)
server_sock.bind((bt_mac_address, bluetooth.PORT_ANY))
server_sock.listen(1)
port = server_sock.getsockname()[1]
uuid = "00001101-0000-1000-8000-00805F9B34FB"
bluetooth.advertise_service(server_sock, "BluetoothServer", service_id=uuid, service_classes=[uuid, bluetooth.SERIAL_PORT_CLASS], profiles=[bluetooth.SERIAL_PORT_PROFILE])
print("Waiting for connection on RFCOMM channel", port)

client_sock, client_info = server_sock.accept()
print("Accepted connection from", client_info)
  
try:
    while True:
        data = client_sock.recv(1024)
        msg = data.decode("utf-8")

        if msg == "quit":
            break

        print("Received from client: ", msg)
        client_sock.send(msg)
except OSError:
    pass

    
print("Disconnected.")

client_sock.close()
server_sock.close()

print("All done.")