how do i broadcast Bluetooth inquiry with python sockets AF_bluetooth socket? - python-3.x

Question

Well at the moment I try to learn more about Bluetooth, I've realized that to connect I need to send a packet to the device called inquiry packet. However for my script I'm more interested in broadcasting it, and even though pybluez provides the high level functions for it. I want to do it with sockets as part of learning experience. Can anyone please tell me, how to specify I want to send the inquiry packet? through the sockets like so
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
and how do I broadcast it, instead of sending to one adress?

Answer 1

Are you asking to create a Serial Port Profile (SPP) socket server?
Any example of that is below.
I have used the pydbus library to get the Bluetooth adapter address but you could just hardcode the mac address if you preferred:
import socket
import pydbus
bus = pydbus.SystemBus()
adapter = bus.get('org.bluez', '/org/bluez/hci0')
adapter_addr = adapter.Address
port = 3 # Normal port for rfcomm?
buf_size = 1024
s = socket.socket(socket.AF_BLUETOOTH, socket.SOCK_STREAM, socket.BTPROTO_RFCOMM)
s.bind((adapter_addr, port))
s.listen(1)
try:
print('Listening for connection...')
client, address = s.accept()
print(f'Connected to {address}')
while True:
data = client.recv(buf_size)
if data:
print(data)
except Exception as e:
print(f'Something went wrong: {e}')
client.close()
s.close()