Add redgtech integration (#136947)

Co-authored-by: luan-nvg <luannnvg@gmail.com>

.strict-typing

@@ -435,6 +435,7 @@ homeassistant.components.raspberry_pi.*
 homeassistant.components.rdw.*
 homeassistant.components.recollect_waste.*
 homeassistant.components.recorder.*
+homeassistant.components.redgtech.*
 homeassistant.components.remember_the_milk.*
 homeassistant.components.remote.*
 homeassistant.components.remote_calendar.*

CODEOWNERS

@@ -1355,6 +1355,8 @@ build.json @home-assistant/supervisor
 /tests/components/recorder/ @home-assistant/core
 /homeassistant/components/recovery_mode/ @home-assistant/core
 /tests/components/recovery_mode/ @home-assistant/core
+/homeassistant/components/redgtech/ @jonhsady @luan-nvg
+/tests/components/redgtech/ @jonhsady @luan-nvg
 /homeassistant/components/refoss/ @ashionky
 /tests/components/refoss/ @ashionky
 /homeassistant/components/rehlko/ @bdraco @peterager

homeassistant/components/redgtech/__init__.py

@@ -0,0 +1,35 @@
+"""Initialize the Redgtech integration for Home Assistant."""
+
+from __future__ import annotations
+
+import logging
+
+from homeassistant.const import Platform
+from homeassistant.core import HomeAssistant
+
+from .coordinator import RedgtechConfigEntry, RedgtechDataUpdateCoordinator
+
+_LOGGER = logging.getLogger(__name__)
+
+
+PLATFORMS = [Platform.SWITCH]
+
+
+async def async_setup_entry(hass: HomeAssistant, entry: RedgtechConfigEntry) -> bool:
+    """Set up Redgtech from a config entry."""
+    _LOGGER.debug("Setting up Redgtech entry: %s", entry.entry_id)
+    coordinator = RedgtechDataUpdateCoordinator(hass, entry)
+
+    await coordinator.async_config_entry_first_refresh()
+
+    entry.runtime_data = coordinator
+
+    await hass.config_entries.async_forward_entry_setups(entry, PLATFORMS)
+    _LOGGER.debug("Successfully set up Redgtech entry: %s", entry.entry_id)
+    return True
+
+
+async def async_unload_entry(hass: HomeAssistant, entry: RedgtechConfigEntry) -> bool:
+    """Unload a config entry."""
+    _LOGGER.debug("Unloading Redgtech entry: %s", entry.entry_id)
+    return await hass.config_entries.async_unload_platforms(entry, PLATFORMS)

homeassistant/components/redgtech/config_flow.py

@@ -0,0 +1,67 @@
+"""Config flow for the Redgtech integration."""
+
+from __future__ import annotations
+
+import logging
+from typing import Any
+
+from redgtech_api.api import RedgtechAPI, RedgtechAuthError, RedgtechConnectionError
+import voluptuous as vol
+
+from homeassistant.config_entries import ConfigFlow, ConfigFlowResult
+from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+
+from .const import DOMAIN, INTEGRATION_NAME
+
+_LOGGER = logging.getLogger(__name__)
+
+
+class RedgtechConfigFlow(ConfigFlow, domain=DOMAIN):
+    """Config Flow for Redgtech integration."""
+
+    async def async_step_user(
+        self, user_input: dict[str, Any] | None = None
+    ) -> ConfigFlowResult:
+        """Handle the initial user step for login."""
+        errors: dict[str, str] = {}
+
+        if user_input is not None:
+            email = user_input[CONF_EMAIL]
+            password = user_input[CONF_PASSWORD]
+
+            self._async_abort_entries_match({CONF_EMAIL: user_input[CONF_EMAIL]})
+
+            api = RedgtechAPI()
+            try:
+                await api.login(email, password)
+            except RedgtechAuthError:
+                errors["base"] = "invalid_auth"
+            except RedgtechConnectionError:
+                errors["base"] = "cannot_connect"
+            except Exception:
+                _LOGGER.exception("Unexpected error during login")
+                errors["base"] = "unknown"
+            else:
+                _LOGGER.debug("Login successful, token received")
+                return self.async_create_entry(
+                    title=email,
+                    data={
+                        CONF_EMAIL: email,
+                        CONF_PASSWORD: password,
+                    },
+                )
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=self.add_suggested_values_to_schema(
+                vol.Schema(
+                    {
+                        vol.Required(CONF_EMAIL): str,
+                        vol.Required(CONF_PASSWORD): str,
+                    }
+                ),
+                user_input,
+            ),
+            errors=errors,
+            description_placeholders={"integration_name": INTEGRATION_NAME},
+        )

homeassistant/components/redgtech/const.py

@@ -0,0 +1,4 @@
+"""Constants for the Redgtech integration."""
+
+DOMAIN = "redgtech"
+INTEGRATION_NAME = "Redgtech"

homeassistant/components/redgtech/coordinator.py

@@ -0,0 +1,130 @@
+"""Coordinator for Redgtech integration."""
+
+from __future__ import annotations
+
+from collections.abc import Callable, Coroutine
+from dataclasses import dataclass
+from datetime import timedelta
+import logging
+from typing import Any
+
+from redgtech_api.api import RedgtechAPI, RedgtechAuthError, RedgtechConnectionError
+
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import ConfigEntryError
+from homeassistant.helpers.update_coordinator import DataUpdateCoordinator, UpdateFailed
+
+from .const import DOMAIN
+
+UPDATE_INTERVAL = timedelta(seconds=15)
+_LOGGER = logging.getLogger(__name__)
+
+
+@dataclass
+class RedgtechDevice:
+    """Representation of a Redgtech device."""
+
+    unique_id: str
+    name: str
+    state: bool
+
+
+type RedgtechConfigEntry = ConfigEntry[RedgtechDataUpdateCoordinator]
+
+
+class RedgtechDataUpdateCoordinator(DataUpdateCoordinator[dict[str, RedgtechDevice]]):
+    """Coordinator to manage fetching data from the Redgtech API.
+
+    Uses a dictionary keyed by unique_id for O(1) device lookup instead of O(n) list iteration.
+    """
+
+    config_entry: RedgtechConfigEntry
+
+    def __init__(self, hass: HomeAssistant, config_entry: RedgtechConfigEntry) -> None:
+        """Initialize the coordinator."""
+        self.api = RedgtechAPI()
+        self.access_token: str | None = None
+        self.email = config_entry.data[CONF_EMAIL]
+        self.password = config_entry.data[CONF_PASSWORD]
+
+        super().__init__(
+            hass,
+            _LOGGER,
+            name=DOMAIN,
+            update_interval=UPDATE_INTERVAL,
+            config_entry=config_entry,
+        )
+
+    async def login(self, email: str, password: str) -> str | None:
+        """Login to the Redgtech API and return the access token."""
+        try:
+            self.access_token = await self.api.login(email, password)
+        except RedgtechAuthError as e:
+            raise ConfigEntryError("Authentication error during login") from e
+        except RedgtechConnectionError as e:
+            raise UpdateFailed("Connection error during login") from e
+        else:
+            _LOGGER.debug("Access token obtained successfully")
+            return self.access_token
+
+    async def renew_token(self, email: str, password: str) -> None:
+        """Renew the access token."""
+        self.access_token = await self.api.login(email, password)
+        _LOGGER.debug("Access token renewed successfully")
+
+    async def call_api_with_valid_token[_R, *_Ts](
+        self, api_call: Callable[[*_Ts], Coroutine[Any, Any, _R]], *args: *_Ts
+    ) -> _R:
+        """Make an API call with a valid token.
+
+        Ensure we have a valid access token, renewing it if necessary.
+        """
+        if not self.access_token:
+            _LOGGER.debug("No access token, logging in")
+            self.access_token = await self.login(self.email, self.password)
+        else:
+            _LOGGER.debug("Using existing access token")
+        try:
+            return await api_call(*args)
+        except RedgtechAuthError:
+            _LOGGER.debug("Auth failed, trying to renew token")
+            await self.renew_token(
+                self.config_entry.data[CONF_EMAIL],
+                self.config_entry.data[CONF_PASSWORD],
+            )
+            return await api_call(*args)
+
+    async def _async_update_data(self) -> dict[str, RedgtechDevice]:
+        """Fetch data from the API on demand.
+
+        Returns a dictionary keyed by unique_id for efficient device lookup.
+        """
+        _LOGGER.debug("Fetching data from Redgtech API on demand")
+        try:
+            data = await self.call_api_with_valid_token(
+                self.api.get_data, self.access_token
+            )
+        except RedgtechAuthError as e:
+            raise ConfigEntryError("Authentication failed") from e
+        except RedgtechConnectionError as e:
+            raise UpdateFailed("Failed to connect to Redgtech API") from e
+
+        devices: dict[str, RedgtechDevice] = {}
+
+        for item in data["boards"]:
+            display_categories = {cat.lower() for cat in item["displayCategories"]}
+
+            if "light" in display_categories or "switch" not in display_categories:
+                continue
+
+            device = RedgtechDevice(
+                unique_id=item["endpointId"],
+                name=item["friendlyName"],
+                state=item["value"],
+            )
+            _LOGGER.debug("Processing device: %s", device)
+            devices[device.unique_id] = device
+
+        return devices

homeassistant/components/redgtech/manifest.json

@@ -0,0 +1,11 @@
+{
+  "domain": "redgtech",
+  "name": "Redgtech",
+  "codeowners": ["@jonhsady", "@luan-nvg"],
+  "config_flow": true,
+  "documentation": "https://www.home-assistant.io/integrations/redgtech",
+  "integration_type": "service",
+  "iot_class": "cloud_polling",
+  "quality_scale": "bronze",
+  "requirements": ["redgtech-api==0.1.38"]
+}

homeassistant/components/redgtech/quality_scale.yaml

@@ -0,0 +1,72 @@
+rules:
+  # Bronze
+  action-setup:
+    status: exempt
+    comment: No custom actions
+  appropriate-polling: done
+  brands: done
+  common-modules: done
+  config-flow-test-coverage: done
+  config-flow: done
+  dependency-transparency: done
+  docs-actions:
+    status: exempt
+    comment: No custom actions
+  docs-high-level-description: done
+  docs-installation-instructions: done
+  docs-removal-instructions: done
+  entity-event-setup:
+    status: exempt
+    comment: No explicit signature for events
+  entity-unique-id: done
+  has-entity-name: done
+  runtime-data: done
+  test-before-configure: done
+  test-before-setup: done
+  unique-config-entry: done
+
+  # Silver
+  action-exceptions: done
+  config-entry-unloading: done
+  docs-configuration-parameters:
+    status: exempt
+    comment: No options flow
+  docs-installation-parameters: done
+  entity-unavailable: done
+  integration-owner: done
+  log-when-unavailable: done
+  parallel-updates: done
+  reauthentication-flow: todo
+  test-coverage: done
+
+  # Gold
+  devices: done
+  diagnostics: todo
+  discovery-update-info: todo
+  discovery: todo
+  docs-data-update: done
+  docs-examples: done
+  docs-known-limitations: done
+  docs-supported-devices: done
+  docs-supported-functions: done
+  docs-troubleshooting: done
+  docs-use-cases: done
+  dynamic-devices: todo
+  entity-category: done
+  entity-device-class: done
+  entity-disabled-by-default:
+    status: exempt
+    comment: Only essential entities
+  entity-translations: done
+  exception-translations: todo
+  icon-translations: done
+  reconfiguration-flow: todo
+  repair-issues:
+    status: exempt
+    comment: No repair issues
+  stale-devices: todo
+
+  # Platinum
+  async-dependency: done
+  inject-websession: todo
+  strict-typing: done

homeassistant/components/redgtech/strings.json

@@ -0,0 +1,40 @@
+{
+  "config": {
+    "abort": {
+      "already_configured": "[%key:common::config_flow::abort::already_configured_device%]"
+    },
+    "error": {
+      "cannot_connect": "[%key:common::config_flow::error::cannot_connect%]",
+      "invalid_auth": "[%key:common::config_flow::error::invalid_auth%]",
+      "unknown": "[%key:common::config_flow::error::unknown%]"
+    },
+    "step": {
+      "user": {
+        "data": {
+          "email": "[%key:common::config_flow::data::email%]",
+          "password": "[%key:common::config_flow::data::password%]"
+        },
+        "data_description": {
+          "email": "Enter the email address associated with your {integration_name} account.",
+          "password": "Enter the password for your {integration_name} account."
+        },
+        "description": "Please enter your credentials to connect to the {integration_name} API.",
+        "title": "Set up {integration_name}"
+      }
+    }
+  },
+  "exceptions": {
+    "api_error": {
+      "message": "Error while communicating with the {integration_name} API"
+    },
+    "authentication_failed": {
+      "message": "Authentication failed. Please check your credentials."
+    },
+    "connection_error": {
+      "message": "Connection error with {integration_name} API"
+    },
+    "switch_auth_error": {
+      "message": "Authentication failed when controlling {integration_name} switch"
+    }
+  }
+}

homeassistant/components/redgtech/switch.py

@@ -0,0 +1,95 @@
+"""Integration for Redgtech switches."""
+
+from __future__ import annotations
+
+from typing import Any
+
+from redgtech_api.api import RedgtechAuthError, RedgtechConnectionError
+
+from homeassistant.components.switch import SwitchEntity
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers.device_registry import DeviceInfo
+from homeassistant.helpers.entity_platform import AddConfigEntryEntitiesCallback
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
+
+from .const import DOMAIN, INTEGRATION_NAME
+from .coordinator import (
+    RedgtechConfigEntry,
+    RedgtechDataUpdateCoordinator,
+    RedgtechDevice,
+)
+
+PARALLEL_UPDATES = 0
+
+
+async def async_setup_entry(
+    hass: HomeAssistant,
+    config_entry: RedgtechConfigEntry,
+    async_add_entities: AddConfigEntryEntitiesCallback,
+) -> None:
+    """Set up the switch platform."""
+    coordinator = config_entry.runtime_data
+    async_add_entities(
+        RedgtechSwitch(coordinator, device) for device in coordinator.data.values()
+    )
+
+
+class RedgtechSwitch(CoordinatorEntity[RedgtechDataUpdateCoordinator], SwitchEntity):
+    """Representation of a Redgtech switch."""
+
+    _attr_has_entity_name = True
+    _attr_name = None
+
+    def __init__(
+        self, coordinator: RedgtechDataUpdateCoordinator, device: RedgtechDevice
+    ) -> None:
+        """Initialize the switch."""
+        super().__init__(coordinator)
+        self.coordinator = coordinator
+        self.device = device
+        self._attr_unique_id = device.unique_id
+        self._attr_device_info = DeviceInfo(
+            identifiers={(DOMAIN, device.unique_id)},
+            name=device.name,
+            manufacturer=INTEGRATION_NAME,
+        )
+
+    @property
+    def is_on(self) -> bool:
+        """Return true if the switch is on."""
+        if device := self.coordinator.data.get(self.device.unique_id):
+            return bool(device.state)
+        return False
+
+    async def _set_state(self, new_state: bool) -> None:
+        """Set state of the switch."""
+        try:
+            await self.coordinator.call_api_with_valid_token(
+                self.coordinator.api.set_switch_state,
+                self.device.unique_id,
+                new_state,
+                self.coordinator.access_token,
+            )
+        except RedgtechAuthError as err:
+            raise HomeAssistantError(
+                translation_domain=DOMAIN,
+                translation_key="switch_auth_error",
+                translation_placeholders={"integration_name": INTEGRATION_NAME},
+            ) from err
+        except RedgtechConnectionError as err:
+            raise HomeAssistantError(
+                translation_domain=DOMAIN,
+                translation_key="connection_error",
+                translation_placeholders={"integration_name": INTEGRATION_NAME},
+            ) from err
+
+        await self.coordinator.async_refresh()
+
+    async def async_turn_on(self, **kwargs: Any) -> None:
+        """Turn the switch on."""
+        await self._set_state(True)
+
+    async def async_turn_off(self, **kwargs: Any) -> None:
+        """Turn the switch off."""
+        await self._set_state(False)

homeassistant/generated/config_flows.py

@@ -570,6 +570,7 @@ FLOWS = {
         "rapt_ble",
         "rdw",
         "recollect_waste",
+        "redgtech",
         "refoss",
         "rehlko",
         "remote_calendar",

homeassistant/generated/integrations.json

@@ -5583,6 +5583,12 @@
       "config_flow": false,
       "iot_class": "cloud_polling"
     },
+    "redgtech": {
+      "name": "Redgtech",
+      "integration_type": "service",
+      "config_flow": true,
+      "iot_class": "cloud_polling"
+    },
     "refoss": {
       "name": "Refoss",
       "integration_type": "hub",

mypy.ini

@@ -4106,6 +4106,16 @@ disallow_untyped_defs = true
 warn_return_any = true
 warn_unreachable = true
 
+[mypy-homeassistant.components.redgtech.*]
+check_untyped_defs = true
+disallow_incomplete_defs = true
+disallow_subclassing_any = true
+disallow_untyped_calls = true
+disallow_untyped_decorators = true
+disallow_untyped_defs = true
+warn_return_any = true
+warn_unreachable = true
+
 [mypy-homeassistant.components.remember_the_milk.*]
 check_untyped_defs = true
 disallow_incomplete_defs = true

requirements_all.txt

@@ -2744,6 +2744,9 @@ rapt-ble==0.1.2
 # homeassistant.components.raspyrfm
 raspyrfm-client==1.2.9
 
+# homeassistant.components.redgtech
+redgtech-api==0.1.38
+
 # homeassistant.components.refoss
 refoss-ha==1.2.5
 

requirements_test_all.txt

@@ -2310,6 +2310,9 @@ radiotherm==2.1.0
 # homeassistant.components.rapt_ble
 rapt-ble==0.1.2
 
+# homeassistant.components.redgtech
+redgtech-api==0.1.38
+
 # homeassistant.components.refoss
 refoss-ha==1.2.5
 

tests/components/redgtech/__init__.py

@@ -0,0 +1 @@
+"""Tests for the Redgtech component."""

tests/components/redgtech/conftest.py

@@ -0,0 +1,70 @@
+"""Test fixtures for Redgtech integration."""
+
+from __future__ import annotations
+
+from collections.abc import Generator
+from unittest.mock import AsyncMock, MagicMock, patch
+
+import pytest
+
+from homeassistant.components.redgtech.const import DOMAIN
+
+from tests.common import MockConfigEntry
+
+TEST_EMAIL = "test@example.com"
+TEST_PASSWORD = "test_password"
+
+
+@pytest.fixture
+def mock_redgtech_api() -> Generator[MagicMock]:
+    """Return a mocked Redgtech API client."""
+    with (
+        patch(
+            "homeassistant.components.redgtech.coordinator.RedgtechAPI", autospec=True
+        ) as api_mock,
+        patch(
+            "homeassistant.components.redgtech.config_flow.RedgtechAPI",
+            new=api_mock,
+        ),
+    ):
+        api = api_mock.return_value
+
+        api.login = AsyncMock(return_value="mock_access_token")
+        api.get_data = AsyncMock(
+            return_value={
+                "boards": [
+                    {
+                        "endpointId": "switch_001",
+                        "friendlyName": "Living Room Switch",
+                        "value": False,
+                        "displayCategories": ["SWITCH"],
+                    },
+                    {
+                        "endpointId": "switch_002",
+                        "friendlyName": "Kitchen Switch",
+                        "value": True,
+                        "displayCategories": ["SWITCH"],
+                    },
+                    {
+                        "endpointId": "light_switch_001",
+                        "friendlyName": "Bedroom Light Switch",
+                        "value": False,
+                        "displayCategories": ["LIGHT", "SWITCH"],
+                    },
+                ]
+            }
+        )
+        api.set_switch_state = AsyncMock()
+
+        yield api
+
+
+@pytest.fixture
+def mock_config_entry() -> MockConfigEntry:
+    """Mock config entry."""
+    return MockConfigEntry(
+        domain=DOMAIN,
+        data={"email": TEST_EMAIL, "password": TEST_PASSWORD},
+        title="Mock Title",
+        entry_id="test_entry",
+    )

tests/components/redgtech/snapshots/test_switch.ambr

@@ -0,0 +1,97 @@
+# serializer version: 1
+# name: test_entities[switch.kitchen_switch-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'switch',
+    'entity_category': None,
+    'entity_id': 'switch.kitchen_switch',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': None,
+    'platform': 'redgtech',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': None,
+    'unique_id': 'switch_002',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[switch.kitchen_switch-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Kitchen Switch',
+    }),
+    'context': <ANY>,
+    'entity_id': 'switch.kitchen_switch',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'on',
+  })
+# ---
+# name: test_entities[switch.living_room_switch-entry]
+  EntityRegistryEntrySnapshot({
+    'aliases': set({
+    }),
+    'area_id': None,
+    'capabilities': None,
+    'config_entry_id': <ANY>,
+    'config_subentry_id': <ANY>,
+    'device_class': None,
+    'device_id': <ANY>,
+    'disabled_by': None,
+    'domain': 'switch',
+    'entity_category': None,
+    'entity_id': 'switch.living_room_switch',
+    'has_entity_name': True,
+    'hidden_by': None,
+    'icon': None,
+    'id': <ANY>,
+    'labels': set({
+    }),
+    'name': None,
+    'options': dict({
+    }),
+    'original_device_class': None,
+    'original_icon': None,
+    'original_name': None,
+    'platform': 'redgtech',
+    'previous_unique_id': None,
+    'suggested_object_id': None,
+    'supported_features': 0,
+    'translation_key': None,
+    'unique_id': 'switch_001',
+    'unit_of_measurement': None,
+  })
+# ---
+# name: test_entities[switch.living_room_switch-state]
+  StateSnapshot({
+    'attributes': ReadOnlyDict({
+      'friendly_name': 'Living Room Switch',
+    }),
+    'context': <ANY>,
+    'entity_id': 'switch.living_room_switch',
+    'last_changed': <ANY>,
+    'last_reported': <ANY>,
+    'last_updated': <ANY>,
+    'state': 'off',
+  })
+# ---

tests/components/redgtech/test_config_flow.py

@@ -0,0 +1,138 @@
+"""Tests Config flow for the Redgtech integration."""
+
+from unittest.mock import MagicMock
+
+import pytest
+from redgtech_api.api import RedgtechAuthError, RedgtechConnectionError
+
+from homeassistant.components.redgtech.const import DOMAIN
+from homeassistant.config_entries import SOURCE_USER
+from homeassistant.const import CONF_EMAIL, CONF_PASSWORD
+from homeassistant.core import HomeAssistant
+from homeassistant.data_entry_flow import FlowResultType
+
+from tests.common import MockConfigEntry
+
+TEST_EMAIL = "test@example.com"
+TEST_PASSWORD = "123456"
+FAKE_TOKEN = "fake_token"
+
+
+@pytest.mark.parametrize(
+    ("side_effect", "expected_error"),
+    [
+        (RedgtechAuthError, "invalid_auth"),
+        (RedgtechConnectionError, "cannot_connect"),
+        (Exception("Generic error"), "unknown"),
+    ],
+)
+async def test_user_step_errors(
+    hass: HomeAssistant,
+    mock_redgtech_api: MagicMock,
+    side_effect: type[Exception],
+    expected_error: str,
+) -> None:
+    """Test user step with various errors."""
+    user_input = {CONF_EMAIL: TEST_EMAIL, CONF_PASSWORD: TEST_PASSWORD}
+    mock_redgtech_api.login.side_effect = side_effect
+    mock_redgtech_api.login.return_value = None
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}, data=user_input
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"]["base"] == expected_error
+    mock_redgtech_api.login.assert_called_once_with(TEST_EMAIL, TEST_PASSWORD)
+
+
+async def test_user_step_creates_entry(
+    hass: HomeAssistant,
+    mock_redgtech_api: MagicMock,
+) -> None:
+    """Tests the correct creation of the entry in the configuration."""
+    user_input = {CONF_EMAIL: TEST_EMAIL, CONF_PASSWORD: TEST_PASSWORD}
+    mock_redgtech_api.login.reset_mock()
+    mock_redgtech_api.login.return_value = FAKE_TOKEN
+    mock_redgtech_api.login.side_effect = None
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}, data=user_input
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == TEST_EMAIL
+    assert result["data"] == user_input
+    # Verify login was called at least once with correct parameters
+    mock_redgtech_api.login.assert_any_call(TEST_EMAIL, TEST_PASSWORD)
+
+
+async def test_user_step_duplicate_entry(
+    hass: HomeAssistant,
+    mock_redgtech_api: MagicMock,
+) -> None:
+    """Test attempt to add duplicate entry."""
+    existing_entry = MockConfigEntry(
+        domain=DOMAIN,
+        unique_id=TEST_EMAIL,
+        data={CONF_EMAIL: TEST_EMAIL},
+    )
+    existing_entry.add_to_hass(hass)
+
+    user_input = {CONF_EMAIL: TEST_EMAIL, CONF_PASSWORD: TEST_PASSWORD}
+
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}, data=user_input
+    )
+
+    assert result["type"] is FlowResultType.ABORT
+    assert result["reason"] == "already_configured"
+    mock_redgtech_api.login.assert_not_called()
+
+
+@pytest.mark.parametrize(
+    ("side_effect", "expected_error"),
+    [
+        (RedgtechAuthError, "invalid_auth"),
+        (RedgtechConnectionError, "cannot_connect"),
+        (Exception("Generic error"), "unknown"),
+    ],
+)
+async def test_user_step_error_recovery(
+    hass: HomeAssistant,
+    mock_redgtech_api: MagicMock,
+    side_effect: Exception,
+    expected_error: str,
+) -> None:
+    """Test that the flow can recover from errors and complete successfully."""
+    user_input = {CONF_EMAIL: TEST_EMAIL, CONF_PASSWORD: TEST_PASSWORD}
+
+    # Reset mock to start fresh
+    mock_redgtech_api.login.reset_mock()
+    mock_redgtech_api.login.return_value = None
+    mock_redgtech_api.login.side_effect = None
+
+    # First attempt fails with error
+    mock_redgtech_api.login.side_effect = side_effect
+    result = await hass.config_entries.flow.async_init(
+        DOMAIN, context={"source": SOURCE_USER}, data=user_input
+    )
+
+    assert result["type"] is FlowResultType.FORM
+    assert result["errors"]["base"] == expected_error
+    # Verify login was called at least once for the first attempt
+    assert mock_redgtech_api.login.call_count >= 1
+    first_call_count = mock_redgtech_api.login.call_count
+
+    # Second attempt succeeds - flow recovers
+    mock_redgtech_api.login.side_effect = None
+    mock_redgtech_api.login.return_value = FAKE_TOKEN
+    result = await hass.config_entries.flow.async_configure(
+        result["flow_id"], user_input=user_input
+    )
+
+    assert result["type"] is FlowResultType.CREATE_ENTRY
+    assert result["title"] == TEST_EMAIL
+    assert result["data"] == user_input
+    # Verify login was called again for the second attempt (recovery)
+    assert mock_redgtech_api.login.call_count > first_call_count

tests/components/redgtech/test_switch.py

@@ -0,0 +1,255 @@
+"""Tests for the Redgtech switch platform."""
+
+from datetime import timedelta
+from unittest.mock import MagicMock
+
+from freezegun import freeze_time
+from freezegun.api import FrozenDateTimeFactory
+import pytest
+from redgtech_api.api import RedgtechAuthError, RedgtechConnectionError
+from syrupy.assertion import SnapshotAssertion
+
+from homeassistant.components.switch import DOMAIN as SWITCH_DOMAIN
+from homeassistant.const import (
+    ATTR_ENTITY_ID,
+    SERVICE_TOGGLE,
+    SERVICE_TURN_OFF,
+    SERVICE_TURN_ON,
+    STATE_UNAVAILABLE,
+)
+from homeassistant.core import HomeAssistant
+from homeassistant.exceptions import HomeAssistantError
+from homeassistant.helpers import entity_registry as er
+
+from tests.common import MockConfigEntry, snapshot_platform
+
+
+@pytest.fixture
+def freezer():
+    """Provide a freezer fixture that works with freeze_time decorator."""
+    with freeze_time() as frozen_time:
+        yield frozen_time
+
+
+@pytest.fixture
+async def setup_redgtech_integration(
+    hass: HomeAssistant,
+    mock_config_entry: MockConfigEntry,
+    mock_redgtech_api: MagicMock,
+) -> MagicMock:
+    """Set up the Redgtech integration with mocked API."""
+    mock_config_entry.add_to_hass(hass)
+    await hass.config_entries.async_setup(mock_config_entry.entry_id)
+    await hass.async_block_till_done()
+    return mock_redgtech_api
+
+
+async def test_entities(
+    hass: HomeAssistant,
+    entity_registry: er.EntityRegistry,
+    snapshot: SnapshotAssertion,
+    setup_redgtech_integration,
+    mock_config_entry: MockConfigEntry,
+) -> None:
+    """Test entity setup."""
+    await snapshot_platform(hass, entity_registry, snapshot, mock_config_entry.entry_id)
+
+
+async def test_switch_turn_on(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+) -> None:
+    """Test turning a switch on."""
+    mock_api = setup_redgtech_integration
+    await hass.services.async_call(
+        SWITCH_DOMAIN,
+        SERVICE_TURN_ON,
+        {ATTR_ENTITY_ID: "switch.living_room_switch"},
+        blocking=True,
+    )
+
+    mock_api.set_switch_state.assert_called_once_with(
+        "switch_001", True, "mock_access_token"
+    )
+
+
+async def test_switch_turn_off(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+) -> None:
+    """Test turning a switch off."""
+    mock_api = setup_redgtech_integration
+    await hass.services.async_call(
+        SWITCH_DOMAIN,
+        SERVICE_TURN_OFF,
+        {ATTR_ENTITY_ID: "switch.kitchen_switch"},
+        blocking=True,
+    )
+
+    mock_api.set_switch_state.assert_called_once_with(
+        "switch_002", False, "mock_access_token"
+    )
+
+
+async def test_switch_toggle(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+) -> None:
+    """Test toggling a switch."""
+    mock_api = setup_redgtech_integration
+    await hass.services.async_call(
+        SWITCH_DOMAIN,
+        SERVICE_TOGGLE,
+        {ATTR_ENTITY_ID: "switch.living_room_switch"},
+        blocking=True,
+    )
+
+    mock_api.set_switch_state.assert_called_once_with(
+        "switch_001", True, "mock_access_token"
+    )
+
+
+@pytest.mark.parametrize(
+    ("exception", "error_message"),
+    [
+        (
+            RedgtechConnectionError("Connection failed"),
+            "Connection error with Redgtech API",
+        ),
+        (
+            RedgtechAuthError("Auth failed"),
+            "Authentication failed when controlling Redgtech switch",
+        ),
+    ],
+)
+async def test_exception_handling(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+    exception: Exception,
+    error_message: str,
+) -> None:
+    """Test exception handling when controlling switches."""
+    mock_api = setup_redgtech_integration
+    mock_api.set_switch_state.side_effect = exception
+
+    with pytest.raises(HomeAssistantError, match=error_message):
+        await hass.services.async_call(
+            SWITCH_DOMAIN,
+            SERVICE_TURN_ON,
+            {ATTR_ENTITY_ID: "switch.living_room_switch"},
+            blocking=True,
+        )
+
+
+async def test_switch_auth_error_with_retry(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+) -> None:
+    """Test handling auth errors with token renewal."""
+    mock_api = setup_redgtech_integration
+    # Mock fails with auth error
+    mock_api.set_switch_state.side_effect = RedgtechAuthError("Auth failed")
+
+    # Expect HomeAssistantError to be raised
+    with pytest.raises(
+        HomeAssistantError,
+        match="Authentication failed when controlling Redgtech switch",
+    ):
+        await hass.services.async_call(
+            SWITCH_DOMAIN,
+            SERVICE_TURN_ON,
+            {ATTR_ENTITY_ID: "switch.living_room_switch"},
+            blocking=True,
+        )
+
+
+@freeze_time("2023-01-01 12:00:00")
+async def test_coordinator_data_update_success(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    freezer: FrozenDateTimeFactory,
+) -> None:
+    """Test successful data update through coordinator."""
+    mock_api = setup_redgtech_integration
+
+    # Update mock data
+    mock_api.get_data.return_value = {
+        "boards": [
+            {
+                "endpointId": "switch_001",
+                "friendlyName": "Living Room Switch",
+                "value": True,  # Changed to True
+                "displayCategories": ["SWITCH"],
+            }
+        ]
+    }
+
+    # Use freezer to advance time and trigger update
+    freezer.tick(delta=timedelta(minutes=2))
+    await hass.async_block_till_done()
+
+    # Verify the entity state was updated successfully
+    living_room_state = hass.states.get("switch.living_room_switch")
+    assert living_room_state is not None
+    assert living_room_state.state == "on"
+
+
+@freeze_time("2023-01-01 12:00:00")
+async def test_coordinator_connection_error_during_update(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    freezer: FrozenDateTimeFactory,
+) -> None:
+    """Test coordinator handling connection errors during data updates."""
+    mock_api = setup_redgtech_integration
+    mock_api.get_data.side_effect = RedgtechConnectionError("Connection failed")
+
+    # Use freezer to advance time and trigger update
+    freezer.tick(delta=timedelta(minutes=2))
+    await hass.async_block_till_done()
+
+    # Verify entities become unavailable due to coordinator error
+    living_room_state = hass.states.get("switch.living_room_switch")
+    kitchen_state = hass.states.get("switch.kitchen_switch")
+
+    assert living_room_state.state == STATE_UNAVAILABLE
+    assert kitchen_state.state == STATE_UNAVAILABLE
+
+
+@freeze_time("2023-01-01 12:00:00")
+async def test_coordinator_auth_error_with_token_renewal(
+    hass: HomeAssistant,
+    setup_redgtech_integration: MagicMock,
+    mock_config_entry: MockConfigEntry,
+    freezer: FrozenDateTimeFactory,
+) -> None:
+    """Test coordinator handling auth errors with token renewal."""
+    mock_api = setup_redgtech_integration
+
+    # First call fails with auth error, second succeeds after token renewal
+    mock_api.get_data.side_effect = [
+        RedgtechAuthError("Auth failed"),
+        {
+            "boards": [
+                {
+                    "endpointId": "switch_001",
+                    "friendlyName": "Living Room Switch",
+                    "value": True,
+                    "displayCategories": ["SWITCH"],
+                }
+            ]
+        },
+    ]
+
+    # Use freezer to advance time and trigger update
+    freezer.tick(delta=timedelta(minutes=2))
+    await hass.async_block_till_done()
+
+    # Verify token renewal was attempted
+    assert mock_api.login.call_count >= 2
+    # Verify entity is available after successful token renewal
+    living_room_state = hass.states.get("switch.living_room_switch")
+    assert living_room_state is not None
+    assert living_room_state.state != STATE_UNAVAILABLE