# Calejo Control Adapter

**Multi-protocol integration adapter for municipal wastewater pump stations with comprehensive safety and security framework**

[![Python Version](https://img.shields.io/badge/python-3.11%2B-blue)](https://www.python.org/)
[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
[![Docker](https://img.shields.io/badge/docker-ready-blue)](https://www.docker.com/)

## Overview

The Calejo Control Adapter translates optimized pump control plans from Calejo Optimize into real-time control signals for municipal wastewater pump stations. It supports diverse SCADA systems with minimal configuration through automatic discovery and multiple protocol support.

### Key Features

- **Multi-Protocol Support**: OPC UA, Modbus TCP, and REST API simultaneously
- **Auto-Discovery**: Automatically discovers pump stations and pumps from database
- **Safety Framework**: Multi-layer limits, watchdogs, emergency stop, failsafe mechanisms
- **Security**: Authentication, authorization, encryption, audit logging
- **Compliance**: IEC 62443, NIS2 Directive, ISO 27001
- **High Availability**: Caching, failover, health monitoring

## Architecture

```
┌─────────────────────────────────────────────────────────┐
│  Calejo Optimize Container (Existing)                   │
│  - Optimization Engine                                  │
│  - PostgreSQL Database (pump plans)                     │
└─────────────────────────────────────────────────────────┘
                          ↓
┌─────────────────────────────────────────────────────────┐
│  Calejo Control Adapter (NEW - TO BE IMPLEMENTED)       │
│                                                          │
│  ┌────────────────────────────────────────────────┐    │
│  │  Core Components:                               │    │
│  │  1. Auto-Discovery Module                       │    │
│  │  2. Security Layer                              │    │
│  │  3. Safety Framework ⚠️ NEW                     │    │
│  │  4. Plan-to-Setpoint Logic Engine               │    │
│  │  5. Multi-Protocol Server                       │    │
│  │     - OPC UA Server                             │    │
│  │     - Modbus TCP Server                         │    │
│  │     - REST API                                  │    │
│  └────────────────────────────────────────────────┘    │
└─────────────────────────────────────────────────────────┘
                          ↓
                  (Multiple Protocols)
                          ↓
        ┌─────────────────┼─────────────────┐
        ↓                 ↓                  ↓
   Siemens WinCC    Schneider EcoStruxure  Rockwell FactoryTalk
```

## Project Structure

```
calejo-control-adapter/
├── src/
│   ├── core/
│   │   ├── auto_discovery.py     # Auto-discovery module
│   │   ├── security.py           # Security layer
│   │   ├── safety.py             # Safety framework
│   │   └── plan_to_setpoint.py   # Plan-to-setpoint logic
│   ├── protocols/
│   │   ├── opc_ua_server.py      # OPC UA server
│   │   ├── modbus_server.py      # Modbus TCP server
│   │   └── rest_api.py           # REST API server
│   ├── database/
│   │   ├── client.py             # Database client
│   │   └── models.py             # Data models
│   ├── monitoring/
│   │   ├── watchdog.py           # Database watchdog
│   │   └── alerts.py             # Alert manager
│   └── main.py                   # Main application
├── tests/
├── config/
│   ├── settings.py               # Application settings
│   └── docker-compose.yml        # Docker configuration
├── docs/
│   └── specification.txt         # Full implementation specification
├── requirements.txt              # Python dependencies
├── Dockerfile                    # Docker container definition
└── README.md                     # This file
```

## Getting Started

### Prerequisites

- Python 3.11+
- PostgreSQL 14+
- Docker (optional)

### Installation

1. **Clone the repository**
   ```bash
   git clone http://95.111.206.201:3000/calejocontrol/CalejoControl.git
   cd calejo-control-adapter
   ```

2. **Install dependencies**
   ```bash
   pip install -r requirements.txt
   ```

3. **Set up environment variables**
   ```bash
   cp config/.env.example config/.env
   # Edit config/.env with your database and security settings
   ```

4. **Run the application**
   ```bash
   python -m src.main
   ```

### Docker Deployment

```bash
# Build the container
docker build -t calejo-control-adapter .

# Run the container
docker run -p 8080:8080 -p 4840:4840 -p 502:502 calejo-control-adapter
```

## Configuration

Key configuration options:

- `DATABASE_URL`: PostgreSQL connection string
- `OPC_UA_ENDPOINT`: OPC UA server endpoint (default: opc.tcp://0.0.0.0:4840)
- `MODBUS_PORT`: Modbus TCP port (default: 502)
- `REST_API_PORT`: REST API port (default: 8080)
- `SAFETY_TIMEOUT_SECONDS`: Database watchdog timeout (default: 1200)

## Safety Framework

The adapter implements a comprehensive three-layer safety architecture:

1. **Layer 1**: Physical Hard Limits (PLC/VFD) - 15-55 Hz
2. **Layer 2**: Station Safety Limits (Database) - 20-50 Hz (enforced by adapter)
3. **Layer 3**: Optimization Constraints (Calejo Optimize) - 25-45 Hz

### Safety Features

- **Hard Operational Limits**: Speed, level, power, and flow limits
- **Rate of Change Limits**: Prevent sudden speed changes
- **Database Watchdog**: Reverts to safe defaults if updates stop
- **Emergency Stop**: Manual override capability
- **Failsafe Mode**: Automatic fallback to default setpoints

## Security & Compliance

- **Authentication**: JWT tokens and certificate-based authentication
- **Authorization**: Role-based access control (RBAC)
- **Encryption**: TLS/SSL for all communications
- **Audit Logging**: Immutable audit trail for compliance
- **Standards**: IEC 62443, ISO 27001, NIS2 Directive

## Development

### Running Tests

```bash
pytest tests/
```

### Code Quality

```bash
flake8 src/ tests/          # Linting
mypy src/                   # Type checking
black src/ tests/           # Code formatting
```

### Contributing

1. Fork the repository
2. Create a feature branch
3. Make your changes
4. Add tests
5. Submit a pull request

## License

This project is licensed under the MIT License - see the LICENSE file for details.

## Support

For support and documentation, refer to the specification in `docs/specification.txt` or contact the development team.