Issues Fixed

1. Missing Dependencies

The project was missing several Python packages required for the OCPP implementation and UI:

Fixed by creating requirements.txt with: - websockets>=15.0 - For WebSocket communication - jsonschema>=4.23.0 - For OCPP message validation - pyscard>=2.0.0 - For RFID card reader functionality - PyQt5>=5.15.0 - For the charging station UI

2. Module Import Path Issue

The ui_hori/charge_point.py file couldn't import the ocpp module because it's located in the parent directory.

Fixed by adding path resolution in ui_hori/charge_point.py:

import sys
import os

# Add parent directory to path to import ocpp module
sys.path.insert(0, os.path.dirname(os.path.dirname(os.path.abspath(__file__))))

Installation

To set up the environment, run:

# Activate the virtual environment
source venv/bin/activate

# Install dependencies
pip install -r requirements.txt

Running the Applications

Central System (OCPP Server)

python central_system.py

This starts the OCPP central system server on ws://0.0.0.0:9000 supporting OCPP 2.1 protocol.

Charge Point UI

cd ui_hori
python charging_ui.py

This starts the PyQt5-based charging station user interface.

Standalone Charge Point

cd ui_hori
python charge_point.py

This runs the charge point client that connects to the central system.

Architecture

  • ocpp/ - Core OCPP library implementation
  • messages.py - OCPP message handling and validation
  • routing.py - Message routing decorators
  • charge_point.py - Base ChargePoint class

  • v21/ - OCPP 2.1 specific implementations

  • central_system.py - OCPP central system server

  • ui_hori/ - Charging station UI application
  • charging_ui.py - Main PyQt5 UI application
  • charge_point.py - OCPP charge point client

Verified Functionality

✓ All Python module imports work correctly ✓ Central system can start and listen for connections ✓ Charge point can connect to central system ✓ BootNotification and Heartbeat messages exchange successfully ✓ UI can import all required modules (PyQt5, charge_point, ocpp, smartcard)