docs: def srbt(bt_address, pkts, inter=0.1, *args, **kargs):
      """send and receive using a bluetooth socket"""
      if "port" in kargs:
          s = conf.BTsocket(bt_address=bt_address, port=kargs.pop("port"))
      else:
          s = conf.BTsocket(bt_address=bt_address)
      a, b = sndrcv(s, pkts, inter=inter, *args, **kargs)
      s.close()
      return a, b