250 lines
9.7 KiB
Python
250 lines
9.7 KiB
Python
"""Coordinator for Bluetti integration."""
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from __future__ import annotations
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from typing import List, cast
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import asyncio
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from datetime import timedelta
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import logging
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import async_timeout
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from bleak import BleakClient, BleakError
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from homeassistant.components import bluetooth
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from homeassistant.core import HomeAssistant
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from homeassistant.helpers.update_coordinator import (
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DataUpdateCoordinator,
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)
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from bluetti_mqtt.bluetooth.client import BluetoothClient
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from bluetti_mqtt.bluetooth import (
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BadConnectionError,
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ModbusError,
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ParseError,
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)
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from bluetti_mqtt.core.devices.bluetti_device import BluettiDevice
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from bluetti_mqtt.core.commands import ReadHoldingRegisters
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from .const import DATA_POLLING_RUNNING, DOMAIN
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from .utils import mac_loggable, build_device
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_LOGGER = logging.getLogger(__name__)
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class PollingCoordinator(DataUpdateCoordinator):
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"""Polling coordinator."""
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def __init__(
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self,
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hass: HomeAssistant,
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address: str,
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device_name: str,
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polling_interval: int,
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persistent_conn: bool,
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polling_timeout: int,
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max_retries: int,
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):
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"""Initialize coordinator."""
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super().__init__(
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hass,
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_LOGGER,
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name="Bluetti polling coordinator",
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update_interval=timedelta(seconds=polling_interval),
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)
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self._address = address
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self.has_notifier = False
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self.notify_future = None
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self.current_command = None
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self.notify_response = bytearray()
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self.bluetti_device = build_device(address, device_name)
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self.persistent_conn = persistent_conn
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self.polling_timeout = polling_timeout
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self.max_retries = max_retries
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# Create client
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self.logger.debug("Creating client")
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device = bluetooth.async_ble_device_from_address(hass, address)
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if device is None:
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self.logger.error("Device %s not available", mac_loggable(address))
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return None
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self.client = BleakClient(device)
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# polling mutex to guard against switches
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self.polling_lock = asyncio.Lock()
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async def _async_update_data(self):
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"""Fetch data from API endpoint.
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This is the place to pre-process the data to lookup tables
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so entities can quickly look up their data.
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"""
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self.hass.data[DOMAIN][self.config_entry.entry_id][DATA_POLLING_RUNNING] = True
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self.logger.debug("Polling data")
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if self.bluetti_device is None:
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self.logger.error("Device type for %s not found", mac_loggable(self._address))
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return None
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parsed_data: dict = {}
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async with self.polling_lock:
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try:
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async with async_timeout.timeout(self.polling_timeout):
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# Reconnect if not connected
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for attempt in range(1, self.max_retries + 1):
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try:
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if not self.client.is_connected:
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await self.client.connect()
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break
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except Exception as e:
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if attempt == self.max_retries or attempt == 1:
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raise # pass exception on max_retries attempt
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else:
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self.logger.warning(f"Connect unsucessful (attempt {attempt}): {e}. Retrying...")
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await asyncio.sleep(2)
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# Attach notifier if needed
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if not self.has_notifier:
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await self.client.start_notify(
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BluetoothClient.NOTIFY_UUID, self._notification_handler
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)
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self.has_notifier = True
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for command in self.bluetti_device.polling_commands:
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try:
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body = command.parse_response(
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await self.async_send_command(command)
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)
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self.logger.debug("Raw data: %s", body)
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parsed = self.bluetti_device.parse(
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command.starting_address, body
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)
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self.logger.debug("Parsed data: %s", parsed)
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parsed_data.update(parsed)
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except ParseError:
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self.logger.warning("Got a parse exception...")
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if len(self.bluetti_device.pack_polling_commands) > 0:
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self.logger.debug("Polling battery packs")
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# pack polling
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for pack in range (1, self.bluetti_device.pack_num_max + 1):
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# Set current pack number
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await self.async_send_command(
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self.bluetti_device.build_setter_command('pack_num', pack)
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)
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# We need to wait after switching packs for the data to be available
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await asyncio.sleep(5)
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for command in self.bluetti_device.pack_polling_commands:
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# Request & parse result for each pack
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try:
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body = command.parse_response(
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await self.async_send_command(command)
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)
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parsed = self.bluetti_device.parse(
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command.starting_address, body
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)
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self.logger.debug("Parsed data: %s", parsed)
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pack_number = parsed.get('pack_num')
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if not isinstance(pack_number, int) or pack_number != pack:
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self.logger.debug("Parsed pack_num(%s) does not match expected '%s'", pack_number, pack)
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continue
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for key, value in parsed.items():
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parsed_data.update({key+str(pack):value})
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except ParseError:
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self.logger.warning("Got a parse exception...")
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except TimeoutError:
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self.logger.warning("Polling timed out for device %s", mac_loggable(self._address))
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return None
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except BleakError as err:
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self.logger.warning("Bleak error: %s", err)
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return None
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finally:
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# Disconnect if connection not persistant
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if not self.persistent_conn:
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if self.has_notifier:
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await self.client.stop_notify(BluetoothClient.NOTIFY_UUID)
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self.has_notifier = False
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await self.client.disconnect()
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self.hass.data[DOMAIN][self.config_entry.entry_id][DATA_POLLING_RUNNING] = False
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# Pass data back to sensors
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return parsed_data
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async def async_send_command(self, command: ReadHoldingRegisters) -> bytes:
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"""Send command and return response"""
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try:
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# Prepare to make request
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self.current_command = command
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self.notify_future = self.hass.loop.create_future()
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self.notify_response = bytearray()
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# Make request
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self.logger.debug("Requesting %s", command)
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await self.client.write_gatt_char(
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BluetoothClient.WRITE_UUID, bytes(command)
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)
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# Wait for response
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res = await asyncio.wait_for(
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self.notify_future, timeout=BluetoothClient.RESPONSE_TIMEOUT
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)
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# Process data
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self.logger.debug("Got %s bytes", len(res))
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return cast(bytes, res)
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except TimeoutError:
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self.logger.debug(
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"Polling timed out (address: %s)", mac_loggable(self._address)
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)
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except ModbusError as err:
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self.logger.warning(
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"Got an invalid request error for %s: %s",
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command,
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err,
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)
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except (BadConnectionError, BleakError) as err:
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self.logger.warning(
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"Needed to disconnect due to error: %s (This can also be the case if you used device controls)", err
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)
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# caught an exception, return empty bytes object
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return bytes()
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def _notification_handler(self, _sender: int, data: bytearray):
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"""Handle bt data."""
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# Ignore notifications we don't expect
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if not self.notify_future or self.notify_future.done():
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_LOGGER.warning("Unexpected notification")
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return
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# If something went wrong, we might get weird data.
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if data == b"AT+NAME?\r" or data == b"AT+ADV?\r":
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err = BadConnectionError("Got AT+ notification")
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self.notify_future.set_exception(err)
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return
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# Save data
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self.notify_response.extend(data)
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if len(self.notify_response) == self.current_command.response_size():
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if self.current_command.is_valid_response(self.notify_response):
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self.notify_future.set_result(self.notify_response)
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else:
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self.notify_future.set_exception(ParseError("Failed checksum"))
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elif self.current_command.is_exception_response(self.notify_response):
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# We got a MODBUS command exception
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msg = f"MODBUS Exception {self.current_command}: {self.notify_response[2]}"
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self.notify_future.set_exception(ModbusError(msg))
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