Calyx

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Calyx tracks indoor garden environments, plant schedules, and hardware. Commercial alternatives lock features behind cloud subscriptions and isolate data from local smart devices. Calyx stores its 30,000-strain database entirely offline and integrates directly with Home Assistant to control grow room sockets without a monthly fee.

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# Calyx

Calyx tracks indoor garden environments, plant schedules, and hardware. Commercial alternatives lock features behind cloud subscriptions and isolate data from local smart devices. Calyx stores its 30,000-strain database entirely offline and integrates directly with Home Assistant to control grow room sockets without a monthly fee. The application runs as a standalone tool, writing records to a local SQLite database. Growers who require multi-device synchronization can deploy the provided Docker container to connect the application to a self-hosted backend.

## Environment and hardware control

The application queries the Home Assistant REST API to display temperature, relative humidity, and Vapor Pressure Deficit (VPD). Users toggle smart sockets directly from the application interface. Calyx also monitors for light bleed during scheduled dark periods and pushes an alert through `ntfy` if it detects illumination.

## Plant and tent management

Users define physical grow tents and assign plants to them. The application references an offline database of 30,000 strains. When a user logs a plant, an automatic calculator uses the strain genetics to determine the optimal harvest window. Growers capture and view chronological photos in a full-screen gallery overlay, which renders the days since germination and current growth phase on the image. The gallery interface provides controls to delete individual photos.

## Feeding and scheduling

The application provides a nutrient solution recipe database to store feeding mixtures. Users assign custom quick actions, such as pruning or nutrient application, to individual plants. Tapping a nutrient action automatically attaches a specific recipe and liquid volume to the plant's history. The log interface formats each entry based on its action type, displaying only the exact variables (pH, EC, recipe scale, or text notes) recorded during the task. A soil moisture reading below 30% places a watering indicator on the calendar.

## Architecture

The frontend requires React 19 and Vite. Capacitor packages the web code into an Android application. The codebase relies on Zustand for state management and React Router for view navigation.

## Build instructions

Install the dependencies:
```bash
npm install
```

Start the development server:
```bash
npm run dev
```

### Android APK

Build the web assets and synchronize them to the Android project:
```bash
npm run build
npx cap sync android
```

### Web application

The interface runs in a web browser without requiring the Android APK. Navigate to the hosted URL and select the browser's "Add to Home Screen" option. This installs a progressive web app shortcut. The browser deployment executes the identical React codebase as the Capacitor build.

### Docker Deployment (Recommended)

Multi-architecture Docker images (supporting `amd64`, `arm64` for Raspberry Pi, etc.) are automatically built and published to the GitHub Container Registry (`ghcr.io`).

Run the frontend container directly:
```bash
docker run -d -p 8080:80 ghcr.io/stefexec/calyx-frontend:latest
```

### Docker Compose

The easiest way to deploy Calyx is using Docker Compose, which pulls the pre-built `ghcr.io` images for both the frontend and backend services. The configuration maps local directories for the SQLite database and image uploads to ensure data persists across container restarts.

A sample `docker-compose.yml`:
```yaml
services:
  calyx-backend:
    image: ghcr.io/stefexec/calyx-backend:latest
    container_name: calyx-backend
    restart: unless-stopped
    volumes:
      - ./data:/app/data
      - ./uploads:/app/uploads
    environment:
      - DATABASE_URL=sqlite:////app/data/calyx.db
      - ENVIRONMENT=production

calyx-frontend:
    image: ghcr.io/stefexec/calyx-frontend:latest
    container_name: calyx-frontend
    restart: unless-stopped
    ports:
      - "8080:80"
    volumes:
      - ./nginx.conf:/etc/nginx/conf.d/default.conf:ro
    depends_on:
      - calyx-backend
```

Run the stack:
```bash
docker compose up -d
```

Calyx

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