Merge pull request 'investigated dishwasher power consumption and generated notification for when machine is done' (#6) from add-dishwasher-done-notification into main

Reviewed-on: LilleVemmelund/home-assistant#6

.env.example

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+# PostgreSQL Database Configuration
+# Copy this file to .env and fill in your actual values
+
+POSTGRES_HOST=localhost
+POSTGRES_PORT=5432
+POSTGRES_DB=home_assistant
+POSTGRES_USER=your_username
+POSTGRES_PASSWORD=your_password

.gitignore

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+# Python
+__pycache__/
+*.py[cod]
+*$py.class
+*.so
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+
+# Virtual environments
+.venv/
+venv/
+ENV/
+env/
+
+# Jupyter Notebook
+.ipynb_checkpoints/
+*.ipynb_checkpoints
+
+# Environment variables
+.env
+.env.local
+
+# Database
+*.db
+*.sqlite
+*.sqlite3
+
+# IDEs
+.vscode/
+.idea/
+*.swp
+*.swo
+*~
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Project specific
+data/
+*.csv
+*.parquet

README.md

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+# Home Assistant Data Analysis
+
+Data analysis notebooks for investigating power consumption and other smart home metrics collected by Home Assistant.
+
+## Project Structure
+
+```bash
+.
+├── .gitea/
+│   └── workflows/
+│       └── setup_database.yml    # CI workflow to setup PostgreSQL database
+├── notebooks/
+│   └── boiler_warning.ipynb      # Power consumption analysis notebook
+├── utils/
+│   ├── __init__.py
+│   └── db_connection.py          # Shared database connection utilities
+├── .env.example                   # Example environment variables
+├── .gitignore
+├── pyproject.toml                # Project dependencies and configuration
+└── README.md
+```
+
+## Setup
+
+### 1. Install UV (Python Package Manager)
+
+```bash
+# macOS/Linux
+curl -LsSf https://astral.sh/uv/install.sh | sh
+
+# Or via Homebrew
+brew install uv
+```
+
+### 2. Create Virtual Environment and Install Dependencies
+
+```bash
+# Create and activate virtual environment with UV
+uv venv
+source .venv/bin/activate  # On macOS/Linux
+
+# Install dependencies
+uv pip install -e .
+```
+
+### 3. Configure Database Connection
+
+```bash
+# Copy example environment file
+cp .env.example .env
+
+# Edit .env with your PostgreSQL credentials
+nano .env  # or use your preferred editor
+```
+
+### 4. Run Jupyter Notebooks
+
+```bash
+# Start Jupyter Lab
+jupyter lab
+
+# Or Jupyter Notebook
+jupyter notebook
+```
+
+## Database Setup
+
+The repository includes a CI workflow (`.gitea/workflows/setup_database.yml`) that can be manually triggered to initialize the PostgreSQL database. Ensure the following secrets are configured in your Gitea repository:
+
+- `POSTGRES_HOST`
+- `POSTGRES_PORT`
+- `POSTGRES_ROOT_PASSWORD`
+- `DB_NAME`
+- `DB_USER`
+- `DB_PASSWORD`
+
+## Notebooks
+
+### Current Notebooks
+
+- **boiler_warning.ipynb**: Analysis of power consumption data from Home Assistant
+
+### Adding New Notebooks
+
+1. Create new notebook in the `notebooks/` directory
+2. Use descriptive names (e.g., `temperature_trends.ipynb`, `energy_efficiency.ipynb`)
+3. Import shared utilities: `from utils import get_db_connection, get_db_engine`
+
+## Shared Utilities
+
+The `utils/` module provides common functions for database connections:
+
+```python
+from utils import get_db_connection, get_db_engine
+
+# Using psycopg2 (for raw SQL)
+conn = get_db_connection()
+cursor = conn.cursor()
+cursor.execute("SELECT * FROM states LIMIT 10")
+
+# Using SQLAlchemy (for pandas integration)
+engine = get_db_engine()
+import pandas as pd
+df = pd.read_sql("SELECT * FROM states LIMIT 10", engine)
+```
+
+## Development
+
+### Optional Development Tools
+
+Install development dependencies for code formatting and linting:
+
+```bash
+uv pip install -e ".[dev]"
+```
+
+Format code with Black:
+
+```bash
+black utils/
+```
+
+Lint code with Ruff:
+
+```bash
+ruff check utils/
+```
+
+## Contributing
+
+When adding new analysis notebooks:
+
+1. Document the purpose and findings in the notebook
+2. Add any new dependencies to `pyproject.toml`
+3. Update this README if adding significant new functionality

pyproject.toml

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+[project]
+name = "home-assistant"
+version = "0.1.0"
+description = "Data analysis notebooks for Home Assistant smart home metrics"
+readme = "README.md"
+requires-python = ">=3.12"
+dependencies = [
+    "jupyter>=1.0.0",
+    "pandas>=2.0.0",
+    "matplotlib>=3.7.0",
+    "seaborn>=0.13.0",
+    "psycopg2-binary>=2.9.0",
+    "sqlalchemy>=2.0.0",
+    "python-dotenv>=1.0.0",
+    "ipykernel>=6.25.0",
+    "pandera>=0.28.1",
+    "plotly>=6.5.2",
+]
+
+[project.optional-dependencies]
+dev = [
+    "ruff>=0.1.0",
+]
+
+[build-system]
+requires = ["hatchling"]
+build-backend = "hatchling.build"
+
+[tool.hatch.build.targets.wheel]
+packages = ["utils"]
+
+[tool.ruff]
+line-length = 100
+target-version = "py312"
+
+[dependency-groups]
+dev = [
+    "pandas-stubs>=2.3.3.260113",
+    "ruff>=0.14.14",
+]

utils/database/__init__.py

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+"""Shared utilities for Home Assistant data analysis."""
+
+from .get_db_session import get_db_session
+from .get_state import get_state
+
+__all__ = [
+    "get_db_session",
+    "get_state",
+]

utils/database/dataframes/__init__.py

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+"""Definition of dataframes."""
+
+from .sensor_state import SensorStateSchema
+
+__all__ = [
+    "SensorStateSchema",
+]

utils/database/dataframes/sensor_state.py

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+"""Definition of SensorStateSchema dataframe schema."""
+
+from typing import Optional
+import pandera.pandas as pa
+import pandas as pd
+
+
+class SensorStateSchema(pa.DataFrameModel):
+    """Schema for sensor state dataframe."""
+
+    time: pd.DatetimeTZDtype = pa.Field(dtype_kwargs={"tz": "UTC"})
+    state: Optional[str]

utils/database/get_db_session.py

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+"""Database connection utilities for Home Assistant PostgreSQL database."""
+
+import os
+from functools import lru_cache
+
+from dotenv import load_dotenv
+from sqlalchemy import create_engine, text
+from sqlalchemy.orm import sessionmaker
+
+# Load environment variables from .env file
+load_dotenv()
+
+
+@lru_cache(maxsize=1)
+def _get_engine(echo: bool = False):
+    """Create and cache the database engine (singleton)."""
+    required_vars = [
+        "POSTGRES_HOST",
+        "POSTGRES_PORT",
+        "POSTGRES_DB",
+        "POSTGRES_USER",
+        "POSTGRES_PASSWORD",
+    ]
+    missing_vars = [var for var in required_vars if not os.getenv(var)]
+
+    if missing_vars:
+        raise ValueError(f"Missing required environment variables: {', '.join(missing_vars)}")
+
+    connection_string = (
+        f"postgresql://{os.getenv('POSTGRES_USER')}:{os.getenv('POSTGRES_PASSWORD')}"
+        f"@{os.getenv('POSTGRES_HOST')}:{os.getenv('POSTGRES_PORT')}/{os.getenv('POSTGRES_DB')}"
+    )
+
+    return create_engine(connection_string, echo=echo)
+
+
+def get_db_session(echo: bool = False) -> sessionmaker:
+    """
+    Create a SQLAlchemy sessionmaker for the Home Assistant PostgreSQL database.
+
+    Args:
+        echo: If True, log all SQL statements (default: False)
+
+    Returns:
+        sessionmaker: Database session maker object
+
+    Raises:
+        ValueError: If required environment variables are not set
+    """
+
+    # Create the SQLAlchemy engine
+    engine = _get_engine(echo=echo)
+
+    # Create a session maker
+    session = sessionmaker(bind=engine)
+
+    # Test connection to database
+    with session.begin() as s:
+        s.execute(text("SELECT 1"))
+
+    return session

utils/database/get_state.py

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+"""Definition of get_state function."""
+
+from datetime import datetime, UTC
+from pandera.typing import DataFrame
+import pandas as pd
+import pandera.pandas as pa
+import sqlalchemy as sa
+
+from utils.database.tables import (
+    States,
+    StatesMeta,
+)
+from utils.database.dataframes import SensorStateSchema
+from utils.database import get_db_session
+
+
+@pa.check_types
+def get_state(
+    entity_id: str,
+    limit: int | None = None,
+    start_time: datetime | None = None,
+    end_time: datetime | None = None,
+) -> DataFrame[SensorStateSchema]:
+    """
+    Retrieve sensor state data.
+
+    Args:
+        entity_id: The entity ID of the sensor.
+        limit: Number of recent records to retrieve (default is None for all records).
+        start_time: Start of time range (inclusive). If None, no lower bound.
+        end_time: End of time range (inclusive). If None, no upper bound.
+
+    Returns:
+        DataFrame[SensorStateSchema]: The retrieved sensor state.
+    """
+
+    # Create a new database session
+    session = get_db_session()
+
+    # Prepare the base statement
+    stmt = (
+        sa.select(
+            States.state,
+            sa.func.to_timestamp(States.last_updated_ts).label("time"),
+        )
+        .join(
+            StatesMeta,
+            States.metadata_id == StatesMeta.metadata_id,
+        )
+        .where(StatesMeta.entity_id == entity_id)
+    )
+
+    # Add time range filters if provided
+    if start_time is not None:
+        start_ts = start_time.astimezone(UTC).timestamp()
+        stmt = stmt.where(States.last_updated_ts >= start_ts)
+
+    if end_time is not None:
+        end_ts = end_time.astimezone(UTC).timestamp()
+        stmt = stmt.where(States.last_updated_ts <= end_ts)
+
+    # Order by time descending and apply limit if specified
+    stmt = stmt.order_by(States.last_updated_ts.desc())
+
+    if limit is not None:
+        stmt = stmt.limit(limit)
+
+    # Execute query
+    with session.begin() as s:
+        df = pd.read_sql(stmt, s.connection())
+
+    # Handle empty results
+    if len(df) == 0:
+        # Create empty DataFrame with correct schema
+        empty_df = pd.DataFrame(
+            {
+                "time": pd.Series([], dtype="datetime64[ns, UTC]"),
+                "state": pd.Series([], dtype="object"),
+            }
+        )
+        return DataFrame[SensorStateSchema](empty_df)
+
+    # Reorder columns to match schema definition
+    df = df[["time", "state"]]
+
+    # Convert time column to nanosecond precision (PostgreSQL returns microseconds)
+    df["time"] = df["time"].dt.as_unit("ns")
+
+    return DataFrame[SensorStateSchema](df)

utils/database/tables/__init__.py

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+"""Database table definitions for Home Assistant PostgreSQL database."""
+
+from .event_data import EventData
+from .event_types import EventTypes
+from .events import Events
+from .migration_changes import MigrationChanges
+from .recorder_runs import RecorderRuns
+from .schema_changes import SchemaChanges
+from .state_attributes import StateAttributes
+from .states_meta import StatesMeta
+from .states import States
+from .statistics_meta import StatisticsMeta
+from .statistics_runs import StatisticsRuns
+from .statistics_short_term import StatisticsShortTerm
+from .statistics import Statistics
+
+__all__ = [
+    "EventData",
+    "EventTypes",
+    "Events",
+    "MigrationChanges",
+    "RecorderRuns",
+    "SchemaChanges",
+    "StateAttributes",
+    "StatesMeta",
+    "States",
+    "StatisticsMeta",
+    "StatisticsRuns",
+    "StatisticsShortTerm",
+    "Statistics",
+]

utils/database/tables/base.py

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+"""Base declarative class for SQLAlchemy ORM models."""
+
+from sqlalchemy.orm import declarative_base
+
+Base = declarative_base()

utils/database/tables/event_data.py

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+"""SQLAlchemy model for the 'event_data' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, Text
+
+from .base import Base
+
+
+class EventData(Base):
+    """SQLAlchemy model for the 'event_data' table."""
+
+    __tablename__ = "event_data"
+    __table_args__ = {"schema": "public"}
+
+    data_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    hash = Column(BigInteger, nullable=True)
+    shared_data = Column(Text, nullable=True)

utils/database/tables/event_types.py

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+"""SQLAlchemy model for the 'event_types' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, String
+
+from .base import Base
+
+
+class EventTypes(Base):
+    """SQLAlchemy model for the 'event_types' table."""
+
+    __tablename__ = "event_types"
+    __table_args__ = {"schema": "public"}
+
+    event_type_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    event_type = Column(String(64), nullable=True)

utils/database/tables/events.py

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+"""SQLAlchemy model for the 'events' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import (
+    Column,
+    BigInteger,
+    CHAR,
+    SmallInteger,
+    TIMESTAMP,
+    Float,
+    LargeBinary,
+    ForeignKey,
+)
+
+from .base import Base
+
+
+class Events(Base):
+    """SQLAlchemy model for the 'events' table."""
+
+    __tablename__ = "events"
+    __table_args__ = {"schema": "public"}
+
+    event_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    event_type = Column(CHAR(1), nullable=True)
+    event_data = Column(CHAR(1), nullable=True)
+    origin = Column(CHAR(1), nullable=True)
+    origin_idx = Column(SmallInteger, nullable=True)
+    time_fired = Column(TIMESTAMP(timezone=True), nullable=True)
+    time_fired_ts = Column(Float, nullable=True)
+    context_id = Column(CHAR(1), nullable=True)
+    context_user_id = Column(CHAR(1), nullable=True)
+    context_parent_id = Column(CHAR(1), nullable=True)
+    data_id = Column(BigInteger, ForeignKey("public.event_data.data_id"), nullable=True)
+    context_id_bin = Column(LargeBinary, nullable=True)
+    context_user_id_bin = Column(LargeBinary, nullable=True)
+    context_parent_id_bin = Column(LargeBinary, nullable=True)
+    event_type_id = Column(
+        BigInteger, ForeignKey("public.event_types.event_type_id"), nullable=True
+    )

utils/database/tables/migration_changes.py

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+"""SQLAlchemy model for the 'migration_changes' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, String, SmallInteger
+
+from .base import Base
+
+
+class MigrationChanges(Base):
+    """SQLAlchemy model for the 'migration_changes' table."""
+
+    __tablename__ = "migration_changes"
+    __table_args__ = {"schema": "public"}
+
+    migration_id = Column(String(255), primary_key=True)
+    version = Column(SmallInteger, nullable=False)

utils/database/tables/recorder_runs.py

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+"""SQLAlchemy model for the 'recorder_runs' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, TIMESTAMP, Boolean
+
+from .base import Base
+
+
+class RecorderRuns(Base):
+    """SQLAlchemy model for the 'recorder_runs' table."""
+
+    __tablename__ = "recorder_runs"
+    __table_args__ = {"schema": "public"}
+
+    run_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    start = Column(TIMESTAMP(timezone=True), nullable=False)
+    end = Column(TIMESTAMP(timezone=True), nullable=True)
+    closed_incorrect = Column(Boolean, nullable=False)
+    created = Column(TIMESTAMP(timezone=True), nullable=False)

utils/database/tables/schema_changes.py

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+"""SQLAlchemy model for the 'schema_changes' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, Integer, TIMESTAMP
+
+from .base import Base
+
+
+class SchemaChanges(Base):
+    """SQLAlchemy model for the 'schema_changes' table."""
+
+    __tablename__ = "schema_changes"
+    __table_args__ = {"schema": "public"}
+
+    change_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    schema_version = Column(Integer, nullable=True)
+    changed = Column(TIMESTAMP(timezone=True), nullable=False)

utils/database/tables/state_attributes.py

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+"""SQLAlchemy model for the 'state_attributes' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, Text
+
+from .base import Base
+
+
+class StateAttributes(Base):
+    """SQLAlchemy model for the 'state_attributes' table."""
+
+    __tablename__ = "state_attributes"
+    __table_args__ = {"schema": "public"}
+
+    attributes_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    hash = Column(BigInteger, nullable=True)
+    shared_attrs = Column(Text, nullable=True)

utils/database/tables/states.py

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+"""SQLAlchemy model for the 'states' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import (
+    Column,
+    BigInteger,
+    CHAR,
+    String,
+    SmallInteger,
+    TIMESTAMP,
+    Float,
+    LargeBinary,
+    ForeignKey,
+)
+
+from .base import Base
+
+
+class States(Base):
+    """SQLAlchemy model for the 'states' table."""
+
+    __tablename__ = "states"
+    __table_args__ = {"schema": "public"}
+
+    state_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    entity_id = Column(CHAR(1), nullable=True)
+    state = Column(String(255), nullable=True)
+    attributes = Column(CHAR(1), nullable=True)
+    event_id = Column(SmallInteger, nullable=True)
+    last_changed = Column(TIMESTAMP(timezone=True), nullable=True)
+    last_changed_ts = Column(Float, nullable=True)
+    last_reported_ts = Column(Float, nullable=True)
+    last_updated = Column(TIMESTAMP(timezone=True), nullable=True)
+    last_updated_ts = Column(Float, nullable=True)
+    old_state_id = Column(BigInteger, ForeignKey("public.states.state_id"), nullable=True)
+    attributes_id = Column(
+        BigInteger, ForeignKey("public.state_attributes.attributes_id"), nullable=True
+    )
+    context_id = Column(CHAR(1), nullable=True)
+    context_user_id = Column(CHAR(1), nullable=True)
+    context_parent_id = Column(CHAR(1), nullable=True)
+    origin_idx = Column(SmallInteger, nullable=True)
+    context_id_bin = Column(LargeBinary, nullable=True)
+    context_user_id_bin = Column(LargeBinary, nullable=True)
+    context_parent_id_bin = Column(LargeBinary, nullable=True)
+    metadata_id = Column(BigInteger, ForeignKey("public.states_meta.metadata_id"), nullable=True)

utils/database/tables/states_meta.py

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+"""SQLAlchemy model for the 'states_meta' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, String
+
+from .base import Base
+
+
+class StatesMeta(Base):
+    """SQLAlchemy model for the 'states_meta' table."""
+
+    __tablename__ = "states_meta"
+    __table_args__ = {"schema": "public"}
+
+    metadata_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    entity_id = Column(String(255), nullable=True)

utils/database/tables/statistics.py

@@ -0,0 +1,29 @@
+"""SQLAlchemy model for the 'statistics' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, TIMESTAMP, Float, ForeignKey
+
+from .base import Base
+
+
+class Statistics(Base):
+    """SQLAlchemy model for the 'statistics' table."""
+
+    __tablename__ = "statistics"
+    __table_args__ = {"schema": "public"}
+
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    created = Column(TIMESTAMP(timezone=True), nullable=True)
+    created_ts = Column(Float, nullable=True)
+    metadata_id = Column(
+        BigInteger, ForeignKey("public.statistics_meta.id", ondelete="CASCADE"), nullable=True
+    )
+    start = Column(TIMESTAMP(timezone=True), nullable=True)
+    start_ts = Column(Float, nullable=True)
+    mean = Column(Float, nullable=True)
+    mean_weight = Column(Float, nullable=True)
+    min = Column(Float, nullable=True)
+    max = Column(Float, nullable=True)
+    last_reset = Column(TIMESTAMP(timezone=True), nullable=True)
+    last_reset_ts = Column(Float, nullable=True)
+    state = Column(Float, nullable=True)
+    sum = Column(Float, nullable=True)

utils/database/tables/statistics_meta.py

@@ -0,0 +1,22 @@
+"""SQLAlchemy model for the 'statistics_meta' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, String, Boolean, SmallInteger
+
+from .base import Base
+
+
+class StatisticsMeta(Base):
+    """SQLAlchemy model for the 'statistics_meta' table."""
+
+    __tablename__ = "statistics_meta"
+    __table_args__ = {"schema": "public"}
+
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    statistic_id = Column(String(255), nullable=True)
+    source = Column(String(32), nullable=True)
+    unit_of_measurement = Column(String(255), nullable=True)
+    unit_class = Column(String(255), nullable=True)
+    has_mean = Column(Boolean, nullable=True)
+    has_sum = Column(Boolean, nullable=True)
+    name = Column(String(255), nullable=True)
+    mean_type = Column(SmallInteger, nullable=False)

utils/database/tables/statistics_runs.py

@@ -0,0 +1,15 @@
+"""SQLAlchemy model for the 'statistics_runs' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, TIMESTAMP
+
+from .base import Base
+
+
+class StatisticsRuns(Base):
+    """SQLAlchemy model for the 'statistics_runs' table."""
+
+    __tablename__ = "statistics_runs"
+    __table_args__ = {"schema": "public"}
+
+    run_id = Column(BigInteger, primary_key=True, autoincrement=True)
+    start = Column(TIMESTAMP(timezone=True), nullable=False)

utils/database/tables/statistics_short_term.py

@@ -0,0 +1,29 @@
+"""SQLAlchemy model for the 'statistics_short_term' table in the Home Assistant PostgreSQL database."""
+
+from sqlalchemy import Column, BigInteger, TIMESTAMP, Float, ForeignKey
+
+from .base import Base
+
+
+class StatisticsShortTerm(Base):
+    """SQLAlchemy model for the 'statistics_short_term' table."""
+
+    __tablename__ = "statistics_short_term"
+    __table_args__ = {"schema": "public"}
+
+    id = Column(BigInteger, primary_key=True, autoincrement=True)
+    created = Column(TIMESTAMP(timezone=True), nullable=True)
+    created_ts = Column(Float, nullable=True)
+    metadata_id = Column(
+        BigInteger, ForeignKey("public.statistics_meta.id", ondelete="CASCADE"), nullable=True
+    )
+    start = Column(TIMESTAMP(timezone=True), nullable=True)
+    start_ts = Column(Float, nullable=True)
+    mean = Column(Float, nullable=True)
+    mean_weight = Column(Float, nullable=True)
+    min = Column(Float, nullable=True)
+    max = Column(Float, nullable=True)
+    last_reset = Column(TIMESTAMP(timezone=True), nullable=True)
+    last_reset_ts = Column(Float, nullable=True)
+    state = Column(Float, nullable=True)
+    sum = Column(Float, nullable=True)