156 lines
5.5 KiB
Python
156 lines
5.5 KiB
Python
"""Coordinator for Bluetti integration."""
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from __future__ import annotations
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import asyncio
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from datetime import timedelta
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import logging
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from typing import cast
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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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build_device,
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)
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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__(self, hass: HomeAssistant, address, device_name: str):
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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=20),
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)
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self._address = address
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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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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.logger.debug("Polling data")
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device = bluetooth.async_ble_device_from_address(self.hass, self._address)
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if device is None:
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self.logger.error("Device %s not available", self._address)
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return None
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if self.bluetti_device is None:
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self.logger.error("Device type for %s not found", self._address)
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return None
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# Polling
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client = BleakClient(device)
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parsed_data: dict = {}
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try:
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async with async_timeout.timeout(15):
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await client.connect()
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await client.start_notify(
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BluetoothClient.NOTIFY_UUID, self._notification_handler
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)
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for command in self.bluetti_device.polling_commands:
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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 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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response = cast(bytes, res)
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body = command.parse_response(response)
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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 TimeoutError:
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self.logger.error(
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"Polling timed out (address: %s)", self._address
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)
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except ParseError:
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self.logger.debug("Got a parse exception...")
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except ModbusError as err:
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self.logger.debug(
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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.debug("Needed to disconnect due to error: %s", err)
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except TimeoutError:
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self.logger.error("Polling timed out for device %s", self._address)
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return None
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except BleakError as err:
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self.logger.error("Bleak error: %s", err)
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return None
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finally:
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await client.disconnect()
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# Pass data back to sensors
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return parsed_data
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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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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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