import asyncio
import logging
-import websockets
from datetime import datetime, timezone
+from typing import Sequence
+import websockets
from ocpp.routing import on
from ocpp.v201 import ChargePoint as cp
from ocpp.v201 import call_result
-from ocpp.v201.enums import RegistrationStatusType, GenericDeviceModelStatusType
+from ocpp.v201.enums import RegistrationStatusType
# Setting up the logging configuration to display debug level messages.
logging.basicConfig(level=logging.DEBUG)
+
# Define a ChargePoint class inheriting from the OCPP 2.0.1 ChargePoint class.
class ChargePoint(cp):
- # Define a handler for the BootNotification message.
+ # Message handlers to receive OCPP message.
@on('BootNotification')
async def on_boot_notification(self, charging_station, reason, **kwargs):
logging.info("Received BootNotification")
# Create and return a BootNotification response with the current time,
# an interval of 10 seconds, and an accepted status.
return call_result.BootNotification(
- current_time = datetime.now(timezone.utc).isoformat(),
+ current_time=datetime.now(timezone.utc).isoformat(),
interval=10,
status=RegistrationStatusType.accepted
)
- # Define a handler for the GetBaseReport message.
- @on('GetBaseReport')
- async def on_get_base_report(self, request_id, report_base, **kwargs):
- try:
- logging.info(f"Received GetBaseReport request with RequestId: {request_id} and ReportBase: {report_base}")
+ # Request handlers to emit OCPP messages.
- # Create a mock response for demonstration purposes, indicating the report is accepted.
- response = call_result.GetBaseReport(
- status=GenericDeviceModelStatusType.accepted
- )
-
- logging.info(f"Sending GetBaseReport response: {response}")
- return response
- except Exception as e:
- # Log any errors that occur while handling the GetBaseReport request.
- logging.error(f"Error handling GetBaseReport request: {e}", exc_info=True)
- # Return a rejected status in case of error.
- return call_result.GetBaseReport(
- status=GenericDeviceModelStatusType.rejected
- )
# Function to handle new WebSocket connections.
async def on_connect(websocket, path):
- """ For every new charge point that connects, create a ChargePoint instance and start listening for messages. """
+ """ For every new charge point that connects, create a ChargePoint instance and start
+ listening for messages."""
try:
requested_protocols = websocket.request_headers['Sec-WebSocket-Protocol']
except KeyError:
# Start the ChargePoint instance to listen for incoming messages.
await cp.start()
+
# Main function to start the WebSocket server.
async def main():
# Create the WebSocket server and specify the handler for new connections.
server = await websockets.serve(
on_connect,
- '0.0.0.0', # Listen on all available interfaces.
- 9000, # Port number.
- subprotocols=['ocpp2.0.1'] # Specify the OCPP 2.0.1 subprotocol.
+ '127.0.0.1', # Listen on loopback.
+ 9000, # Port number.
+ subprotocols=Sequence['ocpp2.0', 'ocpp2.0.1'] # Specify OCPP 2.0.1 subprotocols.
)
logging.info("WebSocket Server Started")
# Wait for the server to close (runs indefinitely).
await server.wait_closed()
+
# Entry point of the script.
if __name__ == '__main__':
# Run the main function to start the server.