biemond
commented
1 month ago yeah need to find out how to do authentication thing or is it allowed without a login and confirmation for you?
async def _do_login():
# Get challenge
challenge_request = PrivateHuaweiModbusRequest(36, bytes([1, 0]), slave=slave or self.slave)
challenge_response = await self._client.execute(challenge_request)
assert challenge_response.content[0] == 0x11
inverter_challenge = challenge_response.content[1:17]
client_challenge = secrets.token_bytes(16)
encoded_username = username.encode("utf-8")
hashed_password = _compute_digest(password.encode("utf-8"), inverter_challenge)
login_bytes = bytes(
[
len(client_challenge) + 1 + len(encoded_username) + 1 + len(hashed_password),
*client_challenge,
len(encoded_username),
*encoded_username,
len(hashed_password),
*hashed_password,
]
)
await asyncio.sleep(0.05)
login_request = PrivateHuaweiModbusRequest(37, login_bytes, slave=slave or self.slave)
login_response = await self._client.execute(login_request)
if login_response.content[1] == 0:
# check if inverter returned the right hash of the password as well
inverter_mac_response_lengths = login_response.content[2]
inverter_mac_response = login_response.content[3 : 3 + inverter_mac_response_lengths]
if not _compute_digest(password.encode("utf-8"), client_challenge) == inverter_mac_response:
LOGGER.error(
"Inverter response contains an invalid challenge answer. This could indicate a MitM-attack!"
)
return True
return False
async with self._communication_lock():
LOGGER.debug("Logging in")
return await _do_login()
mackewigren
Hi and thanks for a nice app. Just found it and worked at once with Modbus on my inverter.
But I really would like to be able to control charging and discharging of the battery. Is it possible to add these functions for Huawei battery in the near future?