Sending messages or datas with bluetooth via python
Question: How can i send messages over bluetooth via python without key authentification
like type numbers ?

i used pybluez but i got this error:

    
    
    File "./send", line 12, in <module>
        connect()
    File "./send", line 8, in connect
        sock.connect((bd_addr, port))
    File "<string>", line 5, in connect
        bluetooth.btcommon.BluetoothError: (111, 'Connection refused')
    

Here is the code

    
    
    #!/usr/bin/python
    
    import bluetooth
    
    def connect ():
        bd_addr = "x:x:x:x:x:x"
        port = 1
        sock=bluetooth.BluetoothSocket(bluetooth.RFCOMM)
        sock.connect((bd_addr, port))
        sock.send("hello!!")
        sock.close()
    
    connect()
    


Answer: As @TJD said, you need to ensure you bind with the correct port for the
service you want.

    
    
    >>> from bluetooth import *
    >>> from pprint import pprint
    >>>
    >>> devices = discover_devices()
    >>> devices
    ['xx:yy:tt:zz:44:BD', '00:yy:72:zz:bb:aa']
    

Then as the second step try to find the service on the device you want to
connect to.

    
    
    >>> service = find_service(address='00:yy:72:zz:bb:aa')
    >>> pprint(service)
    [{'description': None,
      'host': '00:yy:72:zz:bb:aa',
      'name': 'Headset Audio Gateway',
      'port': 12,
      'profiles': [('1108', 258)],
      ...},
     {'description': None,
      'host': '00:yy:72:zz:bb:aa',
      'name': 'Dial-Up Networking',
      'port': 1,
      'profiles': [('1103', 256)],
      'protocol': 'RFCOMM',
      ...}]
    

Based on this information you can connect to a service running on a device.
According to the service/profile [specification](https://www.bluetooth.org/en-
us/specification/assigned-numbers-overview/service-discovery) you send service
specific commands and get back information from the device. E.g. in the list
above you see the 'Headset Audio Gateway' and the profile list with the number
'1108', which is the short uuid for the service. You can now lookup the
commands for this profile and it should work.

