+import argparse
import asyncio
import logging
from datetime import datetime, timezone
from threading import Timer
-from typing import Sequence
import ocpp.v201
import websockets
from ocpp.routing import on
-from ocpp.v201 import call_result
-from ocpp.v201.enums import RegistrationStatusType, ClearCacheStatusType
+from ocpp.v201.enums import (
+ Action,
+ AuthorizationStatusType,
+ ClearCacheStatusType,
+ RegistrationStatusType,
+ ReportBaseType,
+ TransactionEventType,
+)
+from websockets import ConnectionClosed
# Setting up the logging configuration to display debug level messages.
logging.basicConfig(level=logging.DEBUG)
+ChargePoints = set()
+
class RepeatTimer(Timer):
- """ Class that inherits from the Timer class. It will run a
+ """Class that inherits from the Timer class. It will run a
function at regular intervals."""
def run(self):
# Define a ChargePoint class inheriting from the OCPP 2.0.1 ChargePoint class.
class ChargePoint(ocpp.v201.ChargePoint):
# Message handlers to receive OCPP messages.
- @on('BootNotification')
+ @on(Action.BootNotification)
async def on_boot_notification(self, charging_station, reason, **kwargs):
- logging.info("Received BootNotification")
+ logging.info("Received %s", Action.BootNotification)
# Create and return a BootNotification response with the current time,
- # an interval of 10 seconds, and an accepted status.
- return call_result.BootNotification(
+ # an interval of 60 seconds, and an accepted status.
+ return ocpp.v201.call_result.BootNotification(
current_time=datetime.now(timezone.utc).isoformat(),
- interval=10,
- status=RegistrationStatusType.accepted
+ interval=60,
+ status=RegistrationStatusType.accepted,
+ )
+
+ @on(Action.Heartbeat)
+ async def on_heartbeat(self, **kwargs):
+ logging.info("Received %s", Action.Heartbeat)
+ return ocpp.v201.call_result.Heartbeat(
+ current_time=datetime.now(timezone.utc).isoformat()
+ )
+
+ @on(Action.StatusNotification)
+ async def on_status_notification(
+ self, timestamp, evse_id: int, connector_id: int, connector_status, **kwargs
+ ):
+ logging.info("Received %s", Action.StatusNotification)
+ return ocpp.v201.call_result.StatusNotification()
+
+ @on(Action.Authorize)
+ async def on_authorize(self, id_token, **kwargs):
+ logging.info("Received %s", Action.Authorize)
+ return ocpp.v201.call_result.Authorize(
+ id_token_info={"status": AuthorizationStatusType.accepted}
+ )
+
+ @on(Action.TransactionEvent)
+ async def on_transaction_event(
+ self,
+ event_type: TransactionEventType,
+ timestamp,
+ trigger_reason,
+ seq_no: int,
+ transaction_info,
+ **kwargs,
+ ):
+ match event_type:
+ case TransactionEventType.started:
+ logging.info("Received %s Started", Action.TransactionEvent)
+ return ocpp.v201.call_result.TransactionEvent(
+ id_token_info={"status": AuthorizationStatusType.accepted}
+ )
+ case TransactionEventType.updated:
+ logging.info("Received %s Updated", Action.TransactionEvent)
+ return ocpp.v201.call_result.TransactionEvent(total_cost=10)
+ case TransactionEventType.ended:
+ logging.info("Received %s Ended", Action.TransactionEvent)
+ return ocpp.v201.call_result.TransactionEvent()
+
+ @on(Action.MeterValues)
+ async def on_meter_values(self, evse_id: int, meter_value, **kwargs):
+ logging.info("Received %s", Action.MeterValues)
+ return ocpp.v201.call_result.MeterValues()
+
+ @on(Action.GetBaseReport)
+ async def on_get_base_report(
+ self, request_id: int, report_base: ReportBaseType, **kwargs
+ ):
+ logging.info("Received %s", Action.GetBaseReport)
+ return ocpp.v201.call_result.GetBaseReport(
+ id_token_info={"status": ReportBaseType.accepted}
)
# Request handlers to emit OCPP messages.
response = await self.call(request)
if response.status == ClearCacheStatusType.accepted:
- logging.info("Cache clearing successful")
+ logging.info("%s successful", Action.ClearCache)
+ else:
+ logging.info("%s failed", Action.ClearCache)
+
+ async def send_get_base_report(self):
+ request = ocpp.v201.call.GetBaseReport(
+ reportBase=ReportBaseType.ConfigurationInventory
+ )
+ response = await self.call(request)
+
+ if response.status == ReportBaseType.accepted:
+ logging.info("%s successful", Action.GetBaseReport)
else:
- logging.info("Cache clearing failed")
+ logging.info("%s failed", Action.GetBaseReport)
+
+
+# Function to send OCPP command
+async def send_ocpp_command(cp, command_name, delay=None, period=None):
+ try:
+ match command_name:
+ case Action.ClearCache:
+ logging.info("%s Send:", Action.ClearCache)
+ await cp.send_clear_cache()
+ case Action.GetBaseReport:
+ logging.info("%s Send:", Action.GetBaseReport)
+ await cp.send_get_base_report()
+ except Exception:
+ logging.exception(
+ f"Not supported or Failure while processing command {command_name}"
+ )
+
+ if delay:
+ await asyncio.sleep(delay)
+
+ if period:
+ my_timer = RepeatTimer(
+ period, asyncio.create_task, [cp.send_ocpp_command(command_name)]
+ )
+ my_timer.start()
# 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
+ """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']
+ requested_protocols = websocket.request_headers["Sec-WebSocket-Protocol"]
except KeyError:
logging.info("Client hasn't requested any Subprotocol. Closing Connection")
return await websocket.close()
if websocket.subprotocol:
logging.info("Protocols Matched: %s", websocket.subprotocol)
else:
- logging.warning('Protocols Mismatched | Expected Subprotocols: %s,'
- ' but client supports %s | Closing connection',
- websocket.available_subprotocols,
- requested_protocols)
+ logging.warning(
+ "Protocols Mismatched | Expected Subprotocols: %s,"
+ " but client supports %s | Closing connection",
+ websocket.available_subprotocols,
+ requested_protocols,
+ )
return await websocket.close()
- charge_point_id = path.strip('/')
+ charge_point_id = path.strip("/")
cp = ChargePoint(charge_point_id, websocket)
- # Start the ChargePoint instance to listen for incoming messages.
- await cp.start()
+ ChargePoints.add(cp)
+ try:
+ await cp.start()
+
+ except ConnectionClosed:
+ logging.info("ChargePoint %s closed connection", cp.id)
+ ChargePoints.remove(cp)
+ logging.debug("Connected ChargePoint(s): %d", len(ChargePoints))
# Main function to start the WebSocket server.
async def main():
+ # Define argument parser
+ parser = argparse.ArgumentParser(description="OCPP2 Charge Point Simulator")
+ parser.add_argument("--command", type=str, help="OCPP2 Command Name")
+ parser.add_argument("--delay", type=int, help="Delay in seconds")
+ parser.add_argument("--period", type=int, help="Period in seconds")
+
# Create the WebSocket server and specify the handler for new connections.
server = await websockets.serve(
on_connect,
- '127.0.0.1', # Listen on loopback.
+ "127.0.0.1", # Listen on loopback.
9000, # Port number.
- subprotocols=Sequence['ocpp2.0', 'ocpp2.0.1'] # Specify OCPP 2.0.1 subprotocols.
+ subprotocols=["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__':
+if __name__ == "__main__":
# Run the main function to start the server.
asyncio.run(main())
repositories / e-mobility-charging-stations-simulator.git / blobdiff