async def METHOD_NAME(self):
    """Start pairing procedure."""
    self.srp.initialize()
    await self.protocol.start(skip_initial_messages=True)
    msg = messages.crypto_pairing(
        {TlvValue.Method: b"\x00", TlvValue.SeqNo: b"\x01"},
        is_pairing=True,
    )
    resp = await self.protocol.send_and_receive(msg, generate_identifier=False)
    pairing_data = _get_pairing_data(resp)
    self._atv_salt = pairing_data[TlvValue.Salt]
    self._atv_pub_key = pairing_data[TlvValue.PublicKey]