build: Build and publish a proper CLI tool with options, also packaged as a Docker image (#2)

* Renamed environment variables * Moved MqttSettings to main.tsx * Using Commander for CLI arguments * PinoLogger * Option for json log format * Updated mysa-js-sdk to latest version * Moved options to their own module * Extracted session file management to the session module * Added deviceId meta to thermostat instance logger * Display version from package.json; added copyright * Create README.md * Build with tsup * Update .gitignore * Remove prepublishOnly npm script * Distributed CLI executable is now working * Update README.md * Dockerfile * Minify the build output * Update README.md * Create initial Github workflow * Create release.config.mjs * Read package version at run-time, not build-time * Update README.md * Create CONTRIBUTING.md * WIP: docker CI job * Trying multiple tags * Enable docker build cache * Testing the docker build cache * Dockerfile: set npm version in final stage for better caching * Testing docker build cache * Moved VERSION arg to the final build stage * Finalized the `docker` build job * Added copyright header to all source files * Specify radix when parsing integer options
2025-10-21 15:08:07 +00:00 · 2025-06-06 11:33:18 -04:00
parent 7a3f94c37e
commit b7a80cb072
22 changed files with 8654 additions and 238 deletions
--- a/.dockerignore
+++ b/.dockerignore
@@ -0,0 +1,4 @@
+node_modules
+dist
+.env.local
+session.json
--- a/.env
+++ b/.env
@@ -1,10 +0,0 @@
-# "silent" | "fatal" | "error" | "warn" | "info" | "debug" | "trace"
-MYSA_2_MQTT_LOG_LEVEL=info
-MYSA_2_MQTT_BROKER_HOST=localhost
-MYSA_2_MQTT_BROKER_PORT=1883
-
-# Set these variables in .env.local
-# MYSA_2_MQTT_USERNAME=your-mysa-username
-# MYSA_2_MQTT_PASSWORD=your-mysa-password
-# MYSA_2_MQTT_BROKER_USERNAME=mqtt-username
-# MYSA_2_MQTT_BROKER_PASSWORD=mqtt-password
--- a/.github/CODEOWNERS
+++ b/.github/CODEOWNERS
@@ -0,0 +1 @@
+* @bourquep
--- a/.github/FUNDING.yml
+++ b/.github/FUNDING.yml
@@ -0,0 +1,15 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+polar: # Replace with a single Polar username
+buy_me_a_coffee: bourquep
+thanks_dev: # Replace with a single thanks.dev username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']
--- a/.github/dependabot.yml
+++ b/.github/dependabot.yml
@@ -0,0 +1,25 @@
+# To get started with Dependabot version updates, you'll need to specify which
+# package ecosystems to update and where the package manifests are located.
+# Please see the documentation for all configuration options:
+# https://docs.github.com/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file
+
+version: 2
+updates:
+  - package-ecosystem: 'npm' # See documentation for possible values
+    directory: '/' # Location of package manifests
+    schedule:
+      interval: 'daily'
+    labels:
+      - 'dependencies'
+    commit-message:
+      prefix: 'chore'
+      include: 'scope'
+    groups:
+      dev-dependencies:
+        patterns:
+          - '@types/*'
+          - 'eslint*'
+          - 'prettier*'
+          - 'typescript'
+          - 'semantic-release'
+          - '@semantic-release/*'
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -0,0 +1,133 @@
+name: 'CI: lint, build and release'
+
+permissions:
+  contents: read
+  pull-requests: read
+
+concurrency:
+  group: ${{ github.workflow }}-${{ github.ref }}
+  cancel-in-progress: true
+
+on:
+  push:
+    branches: ['main']
+  pull_request:
+    branches: ['main']
+  workflow_dispatch:
+
+env:
+  NODE_VERSION: 22.x
+
+jobs:
+  lint:
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+
+      - run: npm ci
+      - run: npm run style-lint
+      - run: npm run lint
+
+  build:
+    needs:
+      - lint
+
+    runs-on: ubuntu-latest
+
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Use Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+
+      - run: npm ci
+      - run: npm run build
+
+      - uses: actions/upload-artifact@v4
+        with:
+          name: build-output
+          path: ./dist
+          retention-days: 1
+
+  release:
+    if: github.event_name == 'workflow_dispatch'
+    needs: build
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write # to be able to publish a GitHub release
+      issues: write # to be able to comment on released issues
+      pull-requests: write # to be able to comment on released pull requests
+      id-token: write # to be able to specify the provenance of the npm package
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Use Node.js ${{ env.NODE_VERSION }}
+        uses: actions/setup-node@v4
+        with:
+          node-version: ${{ env.NODE_VERSION }}
+          cache: 'npm'
+
+      - name: Download build output
+        uses: actions/download-artifact@v4
+        with:
+          name: build-output
+          path: ./dist
+
+      - run: npm ci -D
+
+      - name: Release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          NPM_TOKEN: ${{ secrets.NPM_TOKEN }}
+        run: npx semantic-release
+
+      - name: Get released version
+        id: version
+        run: |
+          version=$(node -p "require('./package.json').version")
+          echo "version=$version" >> $GITHUB_OUTPUT
+
+  docker:
+    if: github.event_name == 'workflow_dispatch' && needs.release.outputs.version
+    needs: release
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+
+      - name: Login to Docker Hub
+        uses: docker/login-action@v3
+        with:
+          username: ${{ vars.DOCKERHUB_USERNAME }}
+          password: ${{ secrets.DOCKERHUB_TOKEN }}
+
+      - name: Set up QEMU
+        uses: docker/setup-qemu-action@v3
+
+      - name: Set up Docker Buildx
+        uses: docker/setup-buildx-action@v3
+
+      - name: Build and push
+        uses: docker/build-push-action@v6
+        with:
+          cache-from: type=gha
+          cache-to: type=gha,mode=max
+          platforms: linux/amd64,linux/arm64
+          push: true
+          build-args: VERSION=${{ needs.release.outputs.version }}
+          tags: bourquep/mysa2mqtt:${{ needs.release.outputs.version }},bourquep/mysa2mqtt:latest
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 node_modules
+dist
 .env.local
 session.json
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -0,0 +1,160 @@
+# Contributing to mysa2mqtt
+
+First off, thank you for considering contributing to `mysa2mqtt`! Contributions from the community are essential in
+making this project better. Whether you want to report a bug, propose new features, improve documentation or submit code
+changes, I welcome your input and assistance. This guide will help you get started with contributing.
+
+## Development Environment
+
+This project uses Node.js and npm for development. Make sure you have Node.js 22.4.0 or higher installed.
+
+### Setting Up Your Development Environment
+
+1. Fork the repository on GitHub
+2. Clone your fork locally
+3. Navigate to the cloned directory
+4. Install dependencies using npm:
+
+```bash
+npm install
+```
+
+### Project Structure
+
+```
+mysa2mqtt/
+├── src/                          # Source code
+│   ├── commander.d.ts            # Commander type definitions
+│   ├── logger.ts                 # Logging utilities
+│   ├── main.ts                   # Main application entry point
+│   ├── options.ts                # Command line options handling
+│   ├── session.ts                # Session management
+│   └── thermostat.ts             # Thermostat control logic
+├── .github/                      # GitHub configuration
+│   ├── workflows/                # GitHub Actions workflows
+│   │   └── ci.yml                # Continuous integration workflow
+│   ├── CODEOWNERS                # Code ownership definitions
+│   ├── FUNDING.yml               # GitHub Sponsors configuration
+│   └── dependabot.yml            # Dependabot configuration
+├── dist/                         # Built JavaScript files (generated)
+├── node_modules/                 # Dependencies (generated)
+├── .env.local                    # Local environment variables (not source-controlled)
+├── session.json                  # Session data file (not source-controlled)
+└── package.json                  # Project configuration and dependencies
+```
+
+### Development Workflow
+
+1. Create a new branch for your feature or bug fix
+2. Make your changes
+3. Run linting checks: `npm run lint` and `npm run style-lint`
+4. Build the project: `npm run build`
+5. Commit your changes using conventional commit format
+6. Push your changes to your fork
+7. Create a pull request
+
+### Building
+
+Build the project using [tsup](https://github.com/egoist/tsup):
+
+```bash
+npm run build
+```
+
+This will generate JavaScript files in the `dist/` directory.
+
+## Submitting Pull Requests
+
+### Conventional Commits
+
+This repository uses [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/). This means that each commit
+message must follow a specific format. The format is as follows:
+
+```
+<type>[optional scope]: <description>
+```
+
+The `type` must be one of the following:
+
+| Type       | Description                                                                        |
+| ---------- | ---------------------------------------------------------------------------------- |
+| `feat`     | A new feature.                                                                     |
+| `fix`      | A bug fix.                                                                         |
+| `docs`     | Documentation only changes.                                                        |
+| `test`     | Changes to tests.                                                                  |
+| `perf`     | A code change that improves performance.                                           |
+| `refactor` | A code change that neither fixes a bug nor adds a feature.                         |
+| `style`    | Changes that do not affect the meaning of the code (white-space, formatting, etc). |
+| `chore`    | Regular maintenance tasks and updates.                                             |
+| `build`    | Changes that affect the build system or external dependencies.                     |
+| `ci`       | Changes to CI configuration files and scripts.                                     |
+| `revert`   | Reverting a previous commit.                                                       |
+
+The `scope` is optional and should be used to specify the part of the codebase that the commit affects.
+
+The `description` should be a short, concise summary of the changes made in the commit. The description will appear
+as-is in the release notes, so make sure it is clear, informative and not too technical.
+
+For example:
+
+```
+feat: Added support for dark mode
+```
+
+### Semantic Versioning
+
+This repository uses [semantic versioning](https://semver.org/). This means that each release will be versioned
+according to the following rules:
+
+- Increment the major version for breaking changes
+- Increment the minor version for new features
+- Increment the patch version for bug fixes
+
+Releases are automatically generated by [semantic-release](https://github.com/semantic-release/semantic-release) based
+on the commit messages. The version number is determined by the type of commits since the last release.
+
+### Coding Standards
+
+This project adheres to a set of coding standards to ensure consistency and maintainability:
+
+1. **TypeScript**: Write all code in TypeScript with proper type annotations.
+2. **Documentation**: Use [TSDoc](https://tsdoc.org/) comments for all public APIs.
+3. **Clean Code**: Write clear, self-explanatory code with meaningful variable names.
+4. **Error Handling**: Properly handle errors and edge cases.
+
+### Code Style
+
+This repository uses [ESLint](https://eslint.org/) and [Prettier](https://prettier.io/) to enforce code style and
+formatting. All code must pass both linting checks:
+
+```bash
+# Run ESLint
+npm run lint
+
+# Run Prettier
+npm run style-lint
+```
+
+The project is configured with specific rules for:
+
+- Maximum line length
+- Indentation (2 spaces)
+- Quote style (single quotes)
+- Semi-colons (required)
+- Trailing commas
+- And more
+
+These rules are automatically enforced and cannot be overridden. Please make sure that your code follows these
+conventions.
+
+### Pull Request Checklist
+
+Before submitting a pull request, please make sure that:
+
+- Your code follows the coding standards and conventions used in the project
+- Your code passes linting checks: `npm run lint`
+- Your code passes style checks: `npm run style-lint`
+- The documentation has been updated to reflect any changes
+- Your commit messages follow the conventional commits format
+- The build completes successfully: `npm run build`
+- You've verified that your changes work as expected
--- a/53
+++ b/53
@@ -0,0 +1,53 @@
+################################################################################
+# Builder stage
+FROM node:22-alpine AS builder
+
+WORKDIR /app
+
+# Copy package files and install all dependencies for building
+COPY package*.json ./
+RUN npm ci --ignore-scripts
+
+# Copy source code and build
+COPY src ./src
+COPY tsconfig.json .
+COPY tsup.config.cjs .
+
+RUN npm run build
+
+################################################################################
+# Final stage
+FROM node:22-alpine AS final
+
+ARG VERSION
+
+# Metadata
+LABEL maintainer="Pascal Bourque <pascal@cosmos.moi>"
+LABEL description="Expose Mysa smart thermostats to home automation platforms via MQTT."
+LABEL org.opencontainers.image.source="https://github.com/bourquep/mysa2mqtt"
+LABEL org.opencontainers.image.description="Expose Mysa smart thermostats to home automation platforms via MQTT"
+LABEL org.opencontainers.image.licenses="MIT"
+
+# Install security updates
+RUN apk --no-cache upgrade
+
+WORKDIR /app
+
+# Create non-root user
+RUN addgroup -g 1001 -S nodejs && \
+  adduser -S mysa2mqtt -u 1001
+
+# Copy package files and install production dependencies only
+COPY --from=builder /app/package*.json ./
+RUN npm version ${VERSION} --no-git-tag-version && \
+  npm ci --only=production --ignore-scripts && \
+  npm cache clean --force
+
+# Copy built application
+COPY --from=builder /app/dist ./dist
+
+# Change ownership to non-root user
+RUN chown -R mysa2mqtt:nodejs /app
+USER mysa2mqtt
+
+ENTRYPOINT ["node", "dist/main.js"]
--- a/LICENSE.txt
+++ b/LICENSE.txt
@@ -0,0 +1,21 @@
+MIT License
+
+Copyright (c) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
--- a/README.md
+++ b/README.md
@@ -0,0 +1,359 @@
+# mysa2mqtt
+
+A Node.js application that bridges Mysa smart thermostats to MQTT, enabling integration with Home Assistant and other
+home automation platforms.
+
+## Features
+
+- **MQTT Integration**: Exposes Mysa thermostats as MQTT devices compatible with Home Assistant's auto-discovery
+- **Real-time Updates**: Live temperature, humidity, and power consumption monitoring
+- **Full Control**: Set temperature, change modes (heat/off), and monitor thermostat status
+- **Session Management**: Persistent authentication sessions to minimize API calls
+- **Configurable Logging**: Support for JSON and pretty-printed log formats with adjustable levels
+
+## Disclaimer
+
+This tool was developed without the consent of the Mysa Smart Thermostats company, and makes use of undocumented and
+unsupported APIs. Use at your own risk, and be aware that Mysa may change the APIs at any time and break this tool
+permanently.
+
+## Prerequisites
+
+- Node.js 18+
+- A Mysa account with configured thermostats
+- An MQTT broker (like Mosquitto)
+- Optional: Home Assistant for auto-discovery
+
+## Installation
+
+### Option 1: Global Installation (Recommended)
+
+Install globally via npm to use the `mysa2mqtt` command anywhere:
+
+```bash
+npm install -g mysa2mqtt
+```
+
+### Option 2: Run with npx (No Installation Required)
+
+Run directly without installing:
+
+```bash
+npx mysa2mqtt --help
+```
+
+### Option 3: Development Setup
+
+For development or custom modifications:
+
+1. Clone the repository:
+
+   ```bash
+   git clone https://github.com/bourquep/mysa2mqtt.git
+   cd mysa2mqtt
+   ```
+
+2. Install dependencies:
+
+   ```bash
+   npm install
+   ```
+
+3. Run the tool:
+
+   ```bash
+   npm run dev
+   ```
+
+## Quick Start
+
+1. **Install the CLI tool**:
+
+   ```bash
+   npm install -g mysa2mqtt
+   ```
+
+2. **Run with basic configuration**:
+
+   ```bash
+   mysa2mqtt --mqtt-host your-mqtt-broker.local --mysa-username your-email@example.com --mysa-password your-password
+   ```
+
+3. **For persistent configuration**, create a `.env` file:
+
+   ```bash
+   M2M_MQTT_HOST=your-mqtt-broker.local
+   M2M_MYSA_USERNAME=your-mysa-email@example.com
+   M2M_MYSA_PASSWORD=your-mysa-password
+   ```
+
+   Then simply run:
+
+   ```bash
+   mysa2mqtt
+   ```
+
+4. **Check Home Assistant** (if using auto-discovery):
+   - Go to Settings → Devices & Services
+   - Look for automatically discovered Mysa devices
+   - Configure and add to your dashboard
+
+## Configuration
+
+The application can be configured using either command-line arguments or environment variables. Environment variables
+take precedence over command-line defaults.
+
+### Required Configuration
+
+| CLI Option            | Environment Variable | Description                      |
+| --------------------- | -------------------- | -------------------------------- |
+| `-H, --mqtt-host`     | `M2M_MQTT_HOST`      | Hostname of the MQTT broker      |
+| `-u, --mysa-username` | `M2M_MYSA_USERNAME`  | Your Mysa account username/email |
+| `-p, --mysa-password` | `M2M_MYSA_PASSWORD`  | Your Mysa account password       |
+
+### Optional Configuration
+
+#### MQTT Settings
+
+| CLI Option                | Environment Variable    | Default     | Description                             |
+| ------------------------- | ----------------------- | ----------- | --------------------------------------- |
+| `-P, --mqtt-port`         | `M2M_MQTT_PORT`         | `1883`      | Port of the MQTT broker                 |
+| `-U, --mqtt-username`     | `M2M_MQTT_USERNAME`     | -           | Username for MQTT broker authentication |
+| `-B, --mqtt-password`     | `M2M_MQTT_PASSWORD`     | -           | Password for MQTT broker authentication |
+| `-N, --mqtt-client-name`  | `M2M_MQTT_CLIENT_NAME`  | `mysa2mqtt` | Name of the MQTT client                 |
+| `-T, --mqtt-topic-prefix` | `M2M_MQTT_TOPIC_PREFIX` | `mysa2mqtt` | Prefix for MQTT topics                  |
+
+#### Application Settings
+
+| CLI Option                | Environment Variable    | Default        | Description                                                             |
+| ------------------------- | ----------------------- | -------------- | ----------------------------------------------------------------------- |
+| `-l, --log-level`         | `M2M_LOG_LEVEL`         | `info`         | Log level: `silent`, `fatal`, `error`, `warn`, `info`, `debug`, `trace` |
+| `-f, --log-format`        | `M2M_LOG_FORMAT`        | `pretty`       | Log format: `pretty`, `json`                                            |
+| `-s, --mysa-session-file` | `M2M_MYSA_SESSION_FILE` | `session.json` | Path to Mysa session file                                               |
+
+## Usage Examples
+
+### Using Environment Variables (.env file)
+
+Create a `.env` file:
+
+```bash
+# Required
+M2M_MQTT_HOST=mosquitto.local
+M2M_MYSA_USERNAME=user@example.com
+M2M_MYSA_PASSWORD=your-password
+
+# Optional
+M2M_MQTT_PORT=1883
+M2M_MQTT_USERNAME=mqtt-user
+M2M_MQTT_PASSWORD=mqtt-password
+M2M_LOG_LEVEL=info
+M2M_LOG_FORMAT=pretty
+```
+
+Then run:
+
+```bash
+mysa2mqtt
+```
+
+### Using Command Line Arguments
+
+```bash
+mysa2mqtt \
+  --mqtt-host mosquitto.local \
+  --mqtt-port 1883 \
+  --mqtt-username mqtt-user \
+  --mqtt-password mqtt-password \
+  --mysa-username user@example.com \
+  --mysa-password your-password \
+  --log-level debug \
+  --log-format json
+```
+
+### Mixed Configuration
+
+You can combine both approaches. Environment variables will override command-line defaults:
+
+```bash
+# .env file
+M2M_MQTT_HOST=mosquitto.local
+M2M_MYSA_USERNAME=user@example.com
+M2M_MYSA_PASSWORD=your-password
+
+# Command line (will override .env if present)
+mysa2mqtt --log-level debug --mqtt-port 8883
+```
+
+## Home Assistant Integration
+
+When using Home Assistant, devices will be automatically discovered and appear in:
+
+- **Settings → Devices & Services → MQTT**
+- **Climate entities** for temperature control
+- **Sensor entities** for power monitoring
+
+## Troubleshooting
+
+### Common Issues
+
+1. **Authentication Failures**
+
+   - Verify your Mysa username and password
+   - Check if session.json exists and is valid
+   - Try deleting session.json to force re-authentication
+
+2. **MQTT Connection Issues**
+
+   - Verify MQTT broker hostname and port
+   - Check MQTT credentials if authentication is required
+   - Ensure the MQTT broker is accessible from your network
+
+3. **No Devices Found**
+   - Ensure your Mysa thermostats are properly configured in the Mysa app
+   - Check logs for API errors
+   - Verify your Mysa account has active devices
+
+### Debug Mode
+
+Enable debug logging to get more detailed information:
+
+```bash
+mysa2mqtt --log-level debug
+```
+
+Or set in environment:
+
+```bash
+M2M_LOG_LEVEL=debug
+```
+
+### Log Formats
+
+- **Pretty format** (default): Human-readable colored output
+- **JSON format**: Structured logging suitable for log aggregation
+
+## Docker Usage
+
+### Option 1: Pre-built Image (Recommended)
+
+Use the official pre-built Docker image:
+
+```bash
+docker run -d --name mysa2mqtt \
+  -e M2M_MQTT_HOST=your-mqtt-broker \
+  -e M2M_MYSA_USERNAME=your-email \
+  -e M2M_MYSA_PASSWORD=your-password \
+  bourquep/mysa2mqtt:latest
+```
+
+With additional configuration:
+
+```bash
+docker run -d --name mysa2mqtt \
+  -e M2M_MQTT_HOST=your-mqtt-broker \
+  -e M2M_MQTT_PORT=1883 \
+  -e M2M_MQTT_USERNAME=mqtt-user \
+  -e M2M_MQTT_PASSWORD=mqtt-password \
+  -e M2M_MYSA_USERNAME=your-email \
+  -e M2M_MYSA_PASSWORD=your-password \
+  -e M2M_LOG_LEVEL=info \
+  -v $(pwd)/session.json:/app/session.json \
+  bourquep/mysa2mqtt:latest
+```
+
+### Option 2: Build Your Own Image
+
+If you prefer to build your own image, create a `Dockerfile`:
+
+```dockerfile
+FROM node:22-alpine
+
+WORKDIR /app
+
+# Install mysa2mqtt globally
+RUN npm install -g mysa2mqtt
+
+CMD ["mysa2mqtt"]
+```
+
+Build and run:
+
+```bash
+docker build -t mysa2mqtt .
+docker run -d --name mysa2mqtt \
+  -e M2M_MQTT_HOST=your-mqtt-broker \
+  -e M2M_MYSA_USERNAME=your-email \
+  -e M2M_MYSA_PASSWORD=your-password \
+  mysa2mqtt
+```
+
+### Option 3: Use Official Node.js Image
+
+Run directly with the official Node.js image:
+
+```bash
+docker run -d --name mysa2mqtt \
+  -e M2M_MQTT_HOST=your-mqtt-broker \
+  -e M2M_MYSA_USERNAME=your-email \
+  -e M2M_MYSA_PASSWORD=your-password \
+  node:22-alpine \
+  sh -c "npm install -g mysa2mqtt && mysa2mqtt"
+```
+
+### Docker Compose
+
+For easier management, create a `docker-compose.yml` file:
+
+```yaml
+services:
+  mysa2mqtt:
+    image: bourquep/mysa2mqtt:latest
+    container_name: mysa2mqtt
+    restart: unless-stopped
+    environment:
+      - M2M_MQTT_HOST=your-mqtt-broker
+      - M2M_MYSA_USERNAME=your-email
+      - M2M_MYSA_PASSWORD=your-password
+      - M2M_LOG_LEVEL=info
+    volumes:
+      - ./session.json:/app/session.json
+```
+
+Then run:
+
+```bash
+docker-compose up -d
+```
+
+## Contributing
+
+If you want to contribute to this project, please read the [CONTRIBUTING.md](CONTRIBUTING.md) file for guidelines.
+
+## License
+
+`mysa2mqtt` is licensed under the MIT License. This is a permissive license that allows you to use, modify, and
+redistribute this software in both private and commercial projects. You can change the code and distribute your changes
+without being required to release your source code. The MIT License only requires that you include the original
+copyright notice and license text in any copy of the software or substantial portion of it.
+
+## Copyright
+
+© 2025 Pascal Bourque
+
+## Support
+
+- **Issues**: Report bugs and feature requests on [GitHub Issues](https://github.com/bourquep/mysa2mqtt/issues)
+- **Discussions**: Join the conversation on [GitHub Discussions](https://github.com/bourquep/mysa2mqtt/discussions)
+
+## Acknowledgments
+
+- [mysa-js-sdk](https://github.com/bourquep/mysa-js-sdk) - Mysa API client library
+
+  - This library would not be possible without the amazing work by [@dlenski](https://github.com/dlenski) in his
+    [mysotherm](https://github.com/dlenski/mysotherm) repository. He's the one who reversed-engineered the Mysa MQTT
+    protocol which is being used by this library.
+
+- [mqtt2ha](https://github.com/bourquep/mqtt2ha) - MQTT to Home Assistant bridge library
+- [Commander.js](https://github.com/tj/commander.js) - Command-line argument parsing
+- [Pino](https://github.com/pinojs/pino) - Fast JSON logger
--- a/package-lock.json
+++ b/package-lock.json
--- a/package.json
+++ b/package.json
@@ -1,26 +1,72 @@
 {
+  "name": "mysa2mqtt",
+  "version": "0.0.0",
+  "license": "MIT",
+  "private": false,
+  "description": "Expose Mysa smart thermostats to home automation platforms via MQTT.",
+  "keywords": [
+    "mysa",
+    "thermostat",
+    "mqtt",
+    "homeassistant",
+    "home-assistant"
+  ],
+  "publishConfig": {
+    "provenance": true
+  },
+  "author": {
+    "name": "Pascal Bourque",
+    "email": "pascal@cosmos.moi"
+  },
+  "bugs": {
+    "url": "https://github.com/bourquep/mysa2mqtt/issues"
+  },
+  "homepage": "https://github.com/bourquep/mysa2mqtt",
+  "repository": {
+    "type": "git",
+    "url": "git+https://github.com/bourquep/mysa2mqtt.git"
+  },
+  "files": [
+    "README.md",
+    "LICENSE.txt",
+    "dist"
+  ],
  "type": "module",
+  "bin": {
+    "mysa2mqtt": "dist/main.js"
+  },
+  "engines": {
+    "node": ">=22.4.0"
+  },
+  "browser": false,
  "scripts": {
-    "mysa2mqtt": "tsx src/main.ts",
+    "dev": "tsx src/main.ts",
    "lint": "eslint --max-warnings 0 src/**/*.ts",
-    "style-lint": "prettier -c ."
+    "style-lint": "prettier -c .",
+    "build": "tsup"
  },
  "dependencies": {
+    "commander": "14.0.0",
    "dotenv": "16.5.0",
    "mqtt2ha": "4.0.0",
-    "mysa-js-sdk": "1.1.0",
+    "mysa-js-sdk": "1.1.2",
    "pino": "9.7.0",
    "pino-pretty": "13.0.0"
  },
  "devDependencies": {
+    "@commander-js/extra-typings": "14.0.0",
    "@eslint/js": "9.27.0",
+    "@semantic-release/npm": "12.0.1",
    "@types/node": "22.15.21",
+    "conventional-changelog-conventionalcommits": "9.0.0",
    "eslint": "9.27.0",
    "eslint-plugin-jsdoc": "50.6.17",
    "eslint-plugin-tsdoc": "0.4.0",
    "prettier": "3.5.3",
    "prettier-plugin-jsdoc": "1.3.2",
    "prettier-plugin-organize-imports": "4.1.0",
+    "semantic-release": "24.2.5",
+    "tsup": "8.5.0",
    "tsx": "4.19.4",
    "typescript": "5.8.3",
    "typescript-eslint": "8.32.1"
--- a/release.config.mjs
+++ b/release.config.mjs
@@ -0,0 +1,38 @@
+/** @type {import('semantic-release').GlobalConfig} */
+const semanticReleaseConfig = {
+  branches: ['main'],
+  plugins: [
+    [
+      '@semantic-release/commit-analyzer',
+      {
+        preset: 'conventionalcommits',
+        releaseRules: [{ type: 'chore', scope: 'deps', release: 'patch' }]
+      }
+    ],
+    [
+      '@semantic-release/release-notes-generator',
+      {
+        preset: 'conventionalcommits',
+        presetConfig: {
+          types: [
+            { type: 'feat', section: '✨ Features' },
+            { type: 'fix', section: '🐛 Bug Fixes' },
+            { type: 'docs', section: '📚 Documentation' },
+            { type: 'test', section: '🧪 Tests' },
+            { type: 'perf', section: '⚡️ Performance Improvements' },
+            { type: 'refactor', section: '♻️ Code Refactoring' },
+            { type: 'style', section: '💄 Style' },
+            { type: 'chore', section: '🔧 Maintenance' },
+            { type: 'build', section: '📦 Build System' },
+            { type: 'ci', section: '👷 Continuous Integration' },
+            { type: 'revert', section: '⏪ Reverts' }
+          ]
+        }
+      }
+    ],
+    '@semantic-release/npm',
+    '@semantic-release/github'
+  ]
+};
+
+export default semanticReleaseConfig;
--- a/src/commander.d.ts
+++ b/src/commander.d.ts
@@ -0,0 +1,27 @@
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+// commander.d.ts
+declare module 'commander' {
+  export * from '@commander-js/extra-typings';
+}
--- a/src/logger.ts
+++ b/src/logger.ts
@@ -0,0 +1,65 @@
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import { Logger } from 'mqtt2ha';
+import { pino } from 'pino';
+
+export class PinoLogger implements Logger {
+  constructor(private readonly logger: pino.Logger) {}
+
+  debug(message: string, ...meta: unknown[]): void {
+    const obj = meta.at(0);
+    if (obj) {
+      this.logger.debug(obj, message, ...meta);
+    } else {
+      this.logger.debug(message, ...meta);
+    }
+  }
+
+  info(message: string, ...meta: unknown[]): void {
+    const obj = meta.at(0);
+    if (obj) {
+      this.logger.info(obj, message, ...meta);
+    } else {
+      this.logger.info(message, ...meta);
+    }
+  }
+
+  warn(message: string, ...meta: unknown[]): void {
+    const obj = meta.at(0);
+    if (obj) {
+      this.logger.warn(obj, message, ...meta);
+    } else {
+      this.logger.warn(message, ...meta);
+    }
+  }
+
+  error(message: string, ...meta: unknown[]): void {
+    const obj = meta.at(0);
+    if (obj) {
+      this.logger.error(obj, message, ...meta);
+    } else {
+      this.logger.error(message, ...meta);
+    }
+  }
+}
--- a/src/main.ts
+++ b/src/main.ts
@@ -1,73 +1,89 @@
-import { configDotenv } from 'dotenv';
-import { readFile, rm, writeFile } from 'fs/promises';
-import { MysaApiClient, MysaSession } from 'mysa-js-sdk';
-import { pino } from 'pino';
-import { Thermostat } from './thermostat';
+#!/usr/bin/env node

-configDotenv({
-  path: ['.env', '.env.local'],
-  override: true
-});
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import { MqttSettings } from 'mqtt2ha';
+import { MysaApiClient } from 'mysa-js-sdk';
+import { pino } from 'pino';
+import { PinoLogger } from './logger';
+import { options } from './options';
+import { loadSession, saveSession } from './session';
+import { Thermostat } from './thermostat';

 const rootLogger = pino({
  name: 'mysa2mqtt',
-  level: process.env.MYSA_2_MQTT_LOG_LEVEL,
-  transport: {
-    target: 'pino-pretty',
-    options: {
-      colorize: true,
-      singleLine: true,
-      ignore: 'hostname,module',
-      messageFormat: '\x1b[33m[{module}]\x1b[39m {msg}'
-    }
-  }
-}).child({ module: 'mysa2mqtt' });
+  level: options.logLevel,
+  transport:
+    options.logFormat === 'pretty'
+      ? {
+          target: 'pino-pretty',
+          options: {
+            colorize: true,
+            singleLine: true,
+            ignore: 'hostname,module',
+            messageFormat: '\x1b[33m[{module}]\x1b[39m {msg}'
+          }
+        }
+      : undefined
+});

 /** Mysa2mqtt entry-point. */
 async function main() {
  rootLogger.info('Starting mysa2mqtt...');

-  let session: MysaSession | undefined;
-  try {
-    rootLogger.debug('Loading Mysa session...');
-    const sessionJson = await readFile('session.json', 'utf8');
-    session = JSON.parse(sessionJson);
-  } catch {
-    rootLogger.debug('No valid Mysa session file found.');
-  }
-  const client = new MysaApiClient(session, { logger: rootLogger.child({ module: 'mysa-js-sdk' }) });
+  const session = await loadSession(options.mysaSessionFile, rootLogger);
+  const client = new MysaApiClient(session, { logger: new PinoLogger(rootLogger.child({ module: 'mysa-js-sdk' })) });

  client.emitter.on('sessionChanged', async (newSession) => {
-    if (newSession) {
-      rootLogger.debug('Saving new Mysa session...');
-      await writeFile('session.json', JSON.stringify(newSession));
-    } else {
-      try {
-        rootLogger.debug('Removing Mysa session file...');
-        await rm('session.json');
-      } catch {
-        // Ignore error if file does not exist
-      }
-    }
+    await saveSession(newSession, options.mysaSessionFile, rootLogger);
  });

  if (!client.isAuthenticated) {
    rootLogger.info('Logging in...');
-    const username = process.env.MYSA_2_MQTT_USERNAME;
-    const password = process.env.MYSA_2_MQTT_PASSWORD;
-
-    if (!username || !password) {
-      throw new Error('Missing MYSA_2_MQTT_USERNAME or MYSA_2_MQTT_PASSWORD environment variables.');
-    }
-
-    await client.login(username, password);
+    await client.login(options.mysaUsername, options.mysaPassword);
  }

  const [devices, firmwares] = await Promise.all([client.getDevices(), client.getDeviceFirmwares()]);

+  const mqttSettings: MqttSettings = {
+    host: options.mqttHost,
+    port: options.mqttPort,
+    username: options.mqttUsername,
+    password: options.mqttPassword,
+    client_name: options.mqttClientName,
+    state_prefix: options.mqttTopicPrefix
+  };
+
  const thermostats = Object.entries(devices.DevicesObj).map(
    ([, device]) =>
-      new Thermostat(client, device, rootLogger.child({ module: 'thermostat' }), firmwares.Firmware[device.Id])
+      new Thermostat(
+        client,
+        device,
+        mqttSettings,
+        new PinoLogger(rootLogger.child({ module: 'thermostat', deviceId: device.Id })),
+        firmwares.Firmware[device.Id]
+      )
  );

  for (const thermostat of thermostats) {
--- a/src/options.ts
+++ b/src/options.ts
@@ -0,0 +1,146 @@
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import { Command, InvalidArgumentError, Option } from 'commander';
+import { configDotenv } from 'dotenv';
+import { readFileSync } from 'fs';
+import { dirname, join } from 'path';
+import { fileURLToPath } from 'url';
+
+configDotenv({
+  path: ['.env', '.env.local'],
+  override: true
+});
+
+/**
+ * Gets the package version at runtime.
+ *
+ * @returns The package version or 'unknown' if it cannot be read.
+ */
+function getPackageVersion(): string {
+  try {
+    const __filename = fileURLToPath(import.meta.url);
+    const __dirname = dirname(__filename);
+    const packageJsonPath = join(__dirname, '..', 'package.json');
+    const packageJson = JSON.parse(readFileSync(packageJsonPath, 'utf-8'));
+    return packageJson.version || 'unknown';
+  } catch {
+    return 'unknown';
+  }
+}
+
+/**
+ * Parses a required integer value.
+ *
+ * @param value - The value to parse.
+ * @returns The parsed integer value.
+ * @throws InvalidArgumentError if the value is not a valid integer.
+ */
+function parseRequiredInt(value: string) {
+  const parsedValue = parseInt(value, 10);
+  if (isNaN(parsedValue)) {
+    throw new InvalidArgumentError('Must be a number.');
+  }
+  return parsedValue;
+}
+
+const extraHelpText = `
+Copyright (c) 2025 Pascal Bourque
+Licensed under the MIT License
+
+Source code and documentation available at: https://github.com/bourquep/mysa2mqtt
+`;
+
+export const options = new Command('mysa2mqtt')
+  .version(getPackageVersion())
+  .description('Expose Mysa smart thermostats to home automation platforms via MQTT.')
+  .addHelpText('afterAll', extraHelpText)
+  .addOption(
+    new Option('-l, --log-level <logLevel>', 'log level')
+      .choices(['silent', 'fatal', 'error', 'warn', 'info', 'debug', 'trace'])
+      .env('M2M_LOG_LEVEL')
+      .default('info')
+      .helpGroup('Configuration')
+  )
+  .addOption(
+    new Option('-f, --log-format <logFormat>', 'log format')
+      .choices(['pretty', 'json'])
+      .env('M2M_LOG_FORMAT')
+      .default('pretty')
+      .helpGroup('Configuration')
+  )
+  .addOption(
+    new Option('-H, --mqtt-host <mqttHost>', 'hostname of the MQTT broker')
+      .env('M2M_MQTT_HOST')
+      .makeOptionMandatory()
+      .helpGroup('MQTT')
+  )
+  .addOption(
+    new Option('-P, --mqtt-port <mqttPort>', 'port of the MQTT broker')
+      .env('M2M_MQTT_PORT')
+      .argParser(parseRequiredInt)
+      .default(1883)
+      .helpGroup('MQTT')
+  )
+  .addOption(
+    new Option('-U, --mqtt-username <mqttUsername>', 'username of the MQTT broker')
+      .env('M2M_MQTT_USERNAME')
+      .helpGroup('MQTT')
+  )
+  .addOption(
+    new Option('-B, --mqtt-password <mqttPassword>', 'password of the MQTT broker')
+      .env('M2M_MQTT_PASSWORD')
+      .helpGroup('MQTT')
+  )
+  .addOption(
+    new Option('-u, --mysa-username <mysaUsername>', 'Mysa account username')
+      .env('M2M_MYSA_USERNAME')
+      .makeOptionMandatory()
+      .helpGroup('Mysa')
+  )
+  .addOption(
+    new Option('-p, --mysa-password <mysaPassword>', 'Mysa account password')
+      .env('M2M_MYSA_PASSWORD')
+      .makeOptionMandatory()
+      .helpGroup('Mysa')
+  )
+  .addOption(
+    new Option('-s, --mysa-session-file <mysaSessionFile>', 'Mysa session file')
+      .env('M2M_MYSA_SESSION_FILE')
+      .default('session.json')
+      .helpGroup('Configuration')
+  )
+  .addOption(
+    new Option('-N, --mqtt-client-name <mqttClientName>', 'name of the MQTT client')
+      .env('M2M_MQTT_CLIENT_NAME')
+      .default('mysa2mqtt')
+      .helpGroup('MQTT')
+  )
+  .addOption(
+    new Option('-T, --mqtt-topic-prefix <mqttTopicPrefix>', 'prefix of the MQTT topic')
+      .env('M2M_MQTT_TOPIC_PREFIX')
+      .default('mysa2mqtt')
+      .helpGroup('MQTT')
+  )
+  .parse()
+  .opts();
--- a/src/session.ts
+++ b/src/session.ts
@@ -0,0 +1,69 @@
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
+import { readFile, rm, writeFile } from 'fs/promises';
+import { MysaSession } from 'mysa-js-sdk';
+import pino from 'pino';
+
+/**
+ * Loads a Mysa session from a file.
+ *
+ * @param filename - The path to the file containing the session data.
+ * @param logger - The logger instance to use for logging.
+ * @returns A promise that resolves to the loaded MysaSession object or undefined if the file is not found or invalid.
+ */
+export async function loadSession(filename: string, logger: pino.Logger): Promise<MysaSession | undefined> {
+  try {
+    logger.info('Loading Mysa session...');
+    const sessionJson = await readFile(filename, 'utf8');
+    return JSON.parse(sessionJson);
+  } catch {
+    logger.info('No valid Mysa session file found.');
+  }
+}
+
+/**
+ * Saves a Mysa session to a file.
+ *
+ * @param session - The MysaSession object to save.
+ * @param filename - The path to the file to save the session data to.
+ * @param logger - The logger instance to use for logging.
+ * @returns A promise that resolves when the session is saved.
+ */
+export async function saveSession(
+  session: MysaSession | undefined,
+  filename: string,
+  logger: pino.Logger
+): Promise<void> {
+  if (session) {
+    logger.info('Saving Mysa session...');
+    await writeFile(filename, JSON.stringify(session));
+  } else {
+    try {
+      logger.debug('Removing Mysa session file...');
+      await rm(filename);
+    } catch {
+      // Ignore error if file does not exist
+    }
+  }
+}
--- a/src/thermostat.ts
+++ b/src/thermostat.ts
@@ -1,37 +1,51 @@
+/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+
 import { Climate, ClimateAction, DeviceConfiguration, Logger, MqttSettings, Sensor } from 'mqtt2ha';
 import { DeviceBase, FirmwareDevice, MysaApiClient, MysaDeviceMode, StateChange, Status } from 'mysa-js-sdk';

 export class Thermostat {
  private isStarted = false;
-  private mqttSettings: MqttSettings;
-  private mqttDevice: DeviceConfiguration;
-  private mqttClimate: Climate;
-  private mqttPower: Sensor;
+  private readonly mqttDevice: DeviceConfiguration;
+  private readonly mqttClimate: Climate;
+  private readonly mqttPower: Sensor;

  private readonly mysaStatusUpdateHandler = this.handleMysaStatusUpdate.bind(this);
  private readonly mysaStateChangeHandler = this.handleMysaStateChange.bind(this);

  constructor(
-    public client: MysaApiClient,
-    public device: DeviceBase,
-    private logger: Logger,
-    public deviceFirmware?: FirmwareDevice
+    public readonly mysaApiClient: MysaApiClient,
+    public readonly mysaDevice: DeviceBase,
+    private readonly mqttSettings: MqttSettings,
+    private readonly logger: Logger,
+    public readonly mysaDeviceFirmware?: FirmwareDevice
  ) {
-    this.mqttSettings = {
-      host: process.env.MYSA_2_MQTT_BROKER_HOST || 'localhost',
-      port: parseInt(process.env.MYSA_2_MQTT_BROKER_PORT || '1883'),
-      username: process.env.MYSA_2_MQTT_BROKER_USERNAME,
-      password: process.env.MYSA_2_MQTT_BROKER_PASSWORD,
-      client_name: 'mysa2mqtt',
-      state_prefix: 'mysa2mqtt'
-    };
-
    this.mqttDevice = {
-      identifiers: device.Id,
-      name: device.Name,
+      identifiers: mysaDevice.Id,
+      name: mysaDevice.Name,
      manufacturer: 'Mysa',
-      model: device.Model,
-      sw_version: deviceFirmware?.InstalledVersion
+      model: mysaDevice.Model,
+      sw_version: mysaDeviceFirmware?.InstalledVersion
    };

    this.mqttClimate = new Climate(
@@ -41,10 +55,10 @@ export class Thermostat {
        component: {
          component: 'climate',
          device: this.mqttDevice,
-          unique_id: `mysa_${device.Id}_climate`,
+          unique_id: `mysa_${mysaDevice.Id}_climate`,
          name: 'Thermostat',
-          min_temp: device.MinSetpoint,
-          max_temp: device.MaxSetpoint,
+          min_temp: mysaDevice.MinSetpoint,
+          max_temp: mysaDevice.MaxSetpoint,
          modes: ['off', 'heat'], // TODO: AC
          precision: 0.1,
          temp_step: 0.5,
@@ -64,16 +78,16 @@ export class Thermostat {
      async (topic, message) => {
        switch (topic) {
          case 'mode_command_topic':
-            this.client.setDeviceState(
-              this.device.Id,
+            this.mysaApiClient.setDeviceState(
+              this.mysaDevice.Id,
              undefined,
              message === 'off' ? 'off' : message === 'heat' ? 'heat' : undefined
            );
            break;

          case 'power_command_topic':
-            this.client.setDeviceState(
-              this.device.Id,
+            this.mysaApiClient.setDeviceState(
+              this.mysaDevice.Id,
              undefined,
              message === 'OFF' ? 'off' : message === 'ON' ? 'heat' : undefined
            );
@@ -81,9 +95,9 @@ export class Thermostat {

          case 'temperature_command_topic':
            if (message === '') {
-              this.client.setDeviceState(this.device.Id, undefined, undefined);
+              this.mysaApiClient.setDeviceState(this.mysaDevice.Id, undefined, undefined);
            } else {
-              this.client.setDeviceState(this.device.Id, parseFloat(message), undefined);
+              this.mysaApiClient.setDeviceState(this.mysaDevice.Id, parseFloat(message), undefined);
            }
            break;
        }
@@ -96,7 +110,7 @@ export class Thermostat {
      component: {
        component: 'sensor',
        device: this.mqttDevice,
-        unique_id: `mysa_${device.Id}_power`,
+        unique_id: `mysa_${mysaDevice.Id}_power`,
        device_class: 'power',
        state_class: 'measurement',
        unit_of_measurement: 'W',
@@ -114,8 +128,8 @@ export class Thermostat {
    this.isStarted = true;

    try {
-      const deviceStates = await this.client.getDeviceStates();
-      const state = deviceStates.DeviceStatesObj[this.device.Id];
+      const deviceStates = await this.mysaApiClient.getDeviceStates();
+      const state = deviceStates.DeviceStatesObj[this.mysaDevice.Id];

      this.mqttClimate.currentTemperature = state.CorrectedTemp.v;
      this.mqttClimate.currentHumidity = state.Humidity.v;
@@ -129,10 +143,10 @@ export class Thermostat {
      await this.mqttPower.setState('state_topic', 'None');
      await this.mqttPower.writeConfig();

-      this.client.emitter.on('statusChanged', this.mysaStatusUpdateHandler);
-      this.client.emitter.on('stateChanged', this.mysaStateChangeHandler);
+      this.mysaApiClient.emitter.on('statusChanged', this.mysaStatusUpdateHandler);
+      this.mysaApiClient.emitter.on('stateChanged', this.mysaStateChangeHandler);

-      await this.client.startRealtimeUpdates(this.device.Id);
+      await this.mysaApiClient.startRealtimeUpdates(this.mysaDevice.Id);
    } catch (error) {
      this.isStarted = false;
      throw error;
@@ -146,16 +160,16 @@ export class Thermostat {

    this.isStarted = false;

-    await this.client.stopRealtimeUpdates(this.device.Id);
+    await this.mysaApiClient.stopRealtimeUpdates(this.mysaDevice.Id);

-    this.client.emitter.off('statusChanged', this.mysaStatusUpdateHandler);
-    this.client.emitter.off('stateChanged', this.mysaStateChangeHandler);
+    this.mysaApiClient.emitter.off('statusChanged', this.mysaStatusUpdateHandler);
+    this.mysaApiClient.emitter.off('stateChanged', this.mysaStateChangeHandler);

    await this.mqttPower.setState('state_topic', 'None');
  }

  private async handleMysaStatusUpdate(status: Status) {
-    if (!this.isStarted || status.deviceId !== this.device.Id) {
+    if (!this.isStarted || status.deviceId !== this.mysaDevice.Id) {
      return;
    }

@@ -165,7 +179,7 @@ export class Thermostat {
    this.mqttClimate.targetTemperature = this.mqttClimate.currentMode !== 'off' ? status.setPoint : undefined;

    if (status.current != null) {
-      const watts = this.device.Voltage * status.current;
+      const watts = this.mysaDevice.Voltage * status.current;
      await this.mqttPower.setState('state_topic', watts.toFixed(2));
    } else {
      await this.mqttPower.setState('state_topic', 'None');
@@ -173,7 +187,7 @@ export class Thermostat {
  }

  private async handleMysaStateChange(state: StateChange) {
-    if (!this.isStarted || state.deviceId !== this.device.Id) {
+    if (!this.isStarted || state.deviceId !== this.mysaDevice.Id) {
      return;
    }

--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,10 +6,12 @@
    "allowJs": false,
    "strict": true,
    "noEmit": true,
+    "resolveJsonModule": true,
+    "module": "ESNext",
    "paths": {
      "@/*": ["./src/*"]
    }
  },
  "include": ["src/**/*.ts"],
-  "exclude": ["node_modules"]
+  "exclude": ["node_modules", "dist"]
 }
--- a/tsup.config.cjs
+++ b/tsup.config.cjs
@@ -0,0 +1,38 @@
+import { defineConfig } from 'tsup';
+
+const banner = `/*
+mysa2mqtt
+Copyright (C) 2025 Pascal Bourque
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+*/
+`;
+
+export default defineConfig({
+  entry: ['src/main.ts'],
+  platform: 'node',
+  format: ['esm'],
+  clean: true,
+  dts: false,
+  sourcemap: false,
+  minify: true,
+  banner: {
+    js: banner
+  }
+});