First stable version. Works with ESP32 v0.0.1

__init__.py

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+"""The Format BLE Tracker integration."""
+from __future__ import annotations
+
+import asyncio
+from curses import has_key
+import json
+import logging
+from typing import Any
+
+import voluptuous as vol
+
+from homeassistant.components import mqtt
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator
+
+from .const import (
+    ALIVE_NODES_TOPIC,
+    DOMAIN,
+    MAC,
+    NAME,
+    ROOM,
+    ROOT_TOPIC,
+    RSSI,
+)
+
+PLATFORMS: list[Platform] = [
+    Platform.DEVICE_TRACKER,
+    Platform.SENSOR,
+    Platform.NUMBER
+]
+_LOGGER = logging.getLogger(__name__)
+
+MQTT_PAYLOAD = vol.Schema(
+    vol.All(
+        json.loads,
+        vol.Schema(
+            {
+                vol.Required(RSSI): vol.Coerce(int),
+            },
+            extra=vol.ALLOW_EXTRA,
+        ),
+    )
+)
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Set up Format BLE Tracker from a config entry."""
+
+    hass.data.setdefault(DOMAIN, {})
+
+    coordinator = BeaconCoordinator(hass, entry.data)
+
+    mac = entry.data[MAC]
+    state_topic = ROOT_TOPIC + "/" + mac + "/+"
+    _LOGGER.info("Subscribing to %s", state_topic)
+    await mqtt.async_subscribe(hass, state_topic, coordinator.message_received, 1)
+    alive_topic = ALIVE_NODES_TOPIC + "/" + mac
+    _LOGGER.info("Notifying alive to %s", alive_topic)
+    await mqtt.async_publish(hass, alive_topic, True, 1, retain=True)
+
+    hass.data[DOMAIN][entry.entry_id] = coordinator
+    hass.config_entries.async_setup_platforms(entry, PLATFORMS)
+
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: ConfigEntry) -> bool:
+    """Unload a config entry."""
+    if unload_ok := await hass.config_entries.async_unload_platforms(entry, PLATFORMS):
+        hass.data[DOMAIN].pop(entry.entry_id)
+
+        mac = entry.data[MAC]
+        alive_topic = ALIVE_NODES_TOPIC + "/" + mac
+        _LOGGER.info("Notifying alive to %s", alive_topic)
+        await mqtt.async_publish(hass, alive_topic, "", 1, retain=True)
+
+    return unload_ok
+
+
+class BeaconCoordinator(DataUpdateCoordinator[dict[str, Any]]):
+    """Class to arrange interaction with MQTT"""
+
+    def __init__(self, hass: HomeAssistant, data) -> None:
+        self.mac = data[MAC]
+        self.expiration_time : int
+        self.default_expiration_time : int = 2
+        given_name = data[NAME] if data.__contains__(NAME) else self.mac
+        self.room_data = dict[str, int]()
+        self.room_expiration_timers = dict[str, asyncio.TimerHandle]()
+        self.room = None
+
+        super().__init__(hass, _LOGGER, name=given_name)
+
+    async def _async_update_data(self) -> dict[str, Any]:
+        """Update data via library."""
+        _LOGGER.error("Room data: %s", str(self.room_data))
+        if len(self.room_data) == 0:
+            self.room = None
+        else:
+            self.room = next(
+                iter(
+                    dict(
+                        sorted(
+                            self.room_data.items(),
+                            key=lambda item: item[1],
+                            reverse=True,
+                        )
+                    )
+                )
+            )
+        return {**{ROOM: self.room}}
+
+    async def subscribe_to_mqtt(self) -> None:
+        """Subscribe coordinator to MQTT messages"""
+
+    @callback
+    async def message_received(self, msg):
+        """Handle new MQTT messages."""
+        try:
+            data = MQTT_PAYLOAD(msg.payload)
+        except vol.MultipleInvalid as error:
+            _LOGGER.debug("Skipping update because of malformatted data: %s", error)
+            return
+        room_topic = msg.topic.split("/")[2]
+
+        await self.schedule_data_expiration(room_topic)
+        self.room_data[room_topic] = data.get(RSSI)
+        await self.async_refresh()
+
+    async def schedule_data_expiration(self, room):
+        """Start timer for data expiration for certain room"""
+        if room in self.room_expiration_timers:
+            self.room_expiration_timers[room].cancel()
+        loop = asyncio.get_event_loop()
+        timer = loop.call_later(
+            (self.expiration_time if self.expiration_time else self.default_expiration_time) * 60,
+            lambda: asyncio.ensure_future(self.expire_data(room)),
+        )
+        self.room_expiration_timers[room] = timer
+
+    async def expire_data(self, room):
+        """Set data for certain room expired"""
+        del self.room_data[room]
+        del self.room_expiration_timers[room]
+        await self.async_refresh()
+
+    async def on_expiration_time_changed(self, new_time : int):
+        """Respond to expiration time changed by user"""
+        if new_time is None:
+            return
+        self.expiration_time = new_time
+        for room in self.room_expiration_timers.keys():
+            await self.schedule_data_expiration(room)

common.py

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+"""Common values"""
+from homeassistant.helpers.device_registry import format_mac
+from .const import DOMAIN
+from .__init__ import BeaconCoordinator
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
+
+class BeaconDeviceEntity(CoordinatorEntity[BeaconCoordinator]):
+    """Base device class"""
+
+    def __init__(self, coordinator: BeaconCoordinator) -> None:
+        """Initialize."""
+        super().__init__(coordinator)
+        self.formatted_mac_address = format_mac(coordinator.mac)
+
+    @property
+    def device_info(self):
+        return {
+            "identifiers": {
+                # MAC addresses are unique identifiers within a specific domain
+                (DOMAIN, self.formatted_mac_address)
+            },
+            "name": self.coordinator.name,
+        }

config_flow.py

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+"""Config flow for Format BLE Tracker integration."""
+from __future__ import annotations
+
+import re
+from typing import Any
+
+import voluptuous as vol
+
+from homeassistant import config_entries
+from homeassistant.data_entry_flow import FlowResult
+
+from .const import DOMAIN, MAC, MAC_REGEX, UUID_REGEX, NAME
+
+
+STEP_USER_DATA_SCHEMA = vol.Schema(
+    {
+        vol.Required(MAC): str,
+        vol.Optional(NAME): str,
+    }
+)
+
+
+class ConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    """Handle a config flow for Format BLE Tracker."""
+
+    VERSION = 1
+
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> FlowResult:
+        """Handle the initial step."""
+        if user_input is None:
+            return self.async_show_form(
+                step_id="user", data_schema=STEP_USER_DATA_SCHEMA
+            )
+        mac = user_input[MAC].strip().upper()
+        if not re.match(MAC_REGEX, mac) and not re.match(UUID_REGEX, mac):
+            return self.async_abort(reason="not_id")
+        await self.async_set_unique_id(mac)
+        self._abort_if_unique_id_configured()
+
+        given_name = user_input[NAME] if NAME in user_input else mac
+
+        return self.async_create_entry(
+            title=given_name, data={MAC: mac, NAME: given_name}
+        )

const.py

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+"""Constants for the Format BLE Tracker integration."""
+
+DOMAIN = "format_ble_tracker"
+
+MAC = "mac"
+NAME = "name"
+SIXTEENTH_REGEX = "[0-9A-F]"
+MAC_REGEX = "^([0-9A-F]{2}[:]){5}([0-9A-F]{2})$"
+UUID_REGEX = "^[0-9A-F]{8}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{4}-[0-9A-F]{12}$"
+
+ROOM = "room"
+ROOT_TOPIC = "format_ble_tracker"
+ALIVE_NODES_TOPIC = ROOT_TOPIC + "/alive"
+RSSI = "rssi"

device_tracker.py

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+"""Device tracker implementation"""
+from homeassistant.components import device_tracker
+from homeassistant.components.device_tracker.config_entry import BaseTrackerEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import STATE_HOME, STATE_NOT_HOME
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .common import BeaconDeviceEntity
+from .__init__ import BeaconCoordinator
+from .const import DOMAIN
+
+
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
+    """Add device tracker entities from a config_entry."""
+
+    coordinator: BeaconCoordinator = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities([BleDeviceTracker(coordinator)], True)
+
+
+class BleDeviceTracker(BeaconDeviceEntity, BaseTrackerEntity):
+    """Define an device tracker entity."""
+
+    _attr_should_poll = False
+
+    def __init__(self, coordinator: BeaconCoordinator) -> None:
+        """Initialize."""
+        super().__init__(coordinator)
+        self._attr_name = coordinator.name + " tracker"
+        self._attr_unique_id = self.formatted_mac_address + "_tracker"
+        self.entity_id = f"{device_tracker.DOMAIN}.{self._attr_unique_id}"
+
+    @property
+    def source_type(self) -> str:
+        """Return the source type, eg gps or router, of the device."""
+        return "bluetooth_le"
+
+    @property
+    def state(self) -> str:
+        """Return the state of the device."""
+        if self.coordinator.room is None:
+            return STATE_NOT_HOME
+        return STATE_HOME
+
+    @callback
+    def _handle_coordinator_update(self) -> None:
+        """Handle data update."""
+        self.async_write_ha_state()
+
+    async def async_added_to_hass(self) -> None:
+        """Subscribe to MQTT events."""
+        # await self.coordinator.async_on_entity_added_to_ha()
+        return await super().async_added_to_hass()

manifest.json

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+{
+  "domain": "format_ble_tracker",
+  "name": "Format BLE Tracker",
+  "version": "0.0.1",
+  "config_flow": true,
+  "documentation": "https://www.home-assistant.io/integrations/format_ble_tracker",
+  "requirements": [],
+  "ssdp": [],
+  "zeroconf": [],
+  "homekit": {},
+  "dependencies": ["mqtt"],
+  "codeowners": ["@formatBCE"],
+  "iot_class": "local_push"
+}

number.py

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+"""Expiration setter implementation"""
+from homeassistant.components import input_number
+from homeassistant.components.number import NumberEntity, NumberMode, RestoreNumber
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant, callback
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+
+from .common import BeaconDeviceEntity
+from .__init__ import BeaconCoordinator
+from .const import DOMAIN
+
+
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
+    """Add sensor entities from a config_entry."""
+
+    coordinator: BeaconCoordinator = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities([BleDataExpirationNumber(coordinator)], True)
+
+
+class BleDataExpirationNumber(BeaconDeviceEntity, RestoreNumber, NumberEntity):
+    """Define an room sensor entity."""
+
+    _attr_should_poll = False
+
+    def __init__(self, coordinator: BeaconCoordinator) -> None:
+        """Initialize."""
+        super().__init__(coordinator)
+        self._attr_name = coordinator.name + " expiration delay"
+        self._attr_mode = NumberMode.SLIDER
+        self._attr_native_unit_of_measurement = "min"
+        self._attr_native_max_value = 10
+        self._attr_native_min_value = 1
+        self._attr_native_step = 1
+        self._attr_unique_id = self.formatted_mac_address + "_expiration"
+        self.entity_id = f"{input_number.DOMAIN}.{self._attr_unique_id}"
+
+    async def async_added_to_hass(self):
+        """Entity has been added to hass, restoring state"""
+        restored = await self.async_get_last_number_data()
+        native_value = 2 if restored is None else restored.native_value
+        self._attr_native_value = native_value
+        await self.coordinator.on_expiration_time_changed(native_value)
+        self.async_write_ha_state()
+
+    async def async_set_native_value(self, value: float) -> None:
+        """Update the current value."""
+        val = min(10, max(1, int(value)))
+        self._attr_native_value = val
+        await self.coordinator.on_expiration_time_changed(val)
+