3 from datetime
import datetime
, timezone
6 from ocpp
.routing
import on
7 from ocpp
.v201
import ChargePoint
as cp
8 from ocpp
.v201
import call_result
9 from ocpp
.v201
.enums
import RegistrationStatusType
, GenericDeviceModelStatusType
11 # Setting up the logging configuration to display debug level messages.
12 logging
.basicConfig(level
=logging
.DEBUG
)
15 # Define a ChargePoint class inheriting from the OCPP 2.0.1 ChargePoint class.
16 class ChargePoint(cp
):
17 # Define a handler for the BootNotification message.
18 @on('BootNotification')
19 async def on_boot_notification(self
, charging_station
, reason
, **kwargs
):
20 logging
.info("Received BootNotification")
21 # Create and return a BootNotification response with the current time,
22 # an interval of 10 seconds, and an accepted status.
23 return call_result
.BootNotification(
24 current_time
=datetime
.now(timezone
.utc
).isoformat(),
26 status
=RegistrationStatusType
.accepted
29 # Define a handler for the GetBaseReport message.
31 async def on_get_base_report(self
, request_id
, report_base
, **kwargs
):
34 f
"Received GetBaseReport request with RequestId: {request_id} and ReportBase: {report_base}")
36 # Create a mock response for demonstration purposes, indicating the report is accepted.
37 response
= call_result
.GetBaseReport(
38 status
=GenericDeviceModelStatusType
.accepted
41 logging
.info(f
"Sending GetBaseReport response: {response}")
43 except Exception as e
:
44 # Log any errors that occur while handling the GetBaseReport request.
45 logging
.error(f
"Error handling GetBaseReport request: {e}", exc_info
=True)
46 # Return a rejected status in case of error.
47 return call_result
.GetBaseReport(
48 status
=GenericDeviceModelStatusType
.rejected
52 # Function to handle new WebSocket connections.
53 async def on_connect(websocket
, path
):
54 """ For every new charge point that connects, create a ChargePoint instance and start
55 listening for messages."""
57 requested_protocols
= websocket
.request_headers
['Sec-WebSocket-Protocol']
59 logging
.info("Client hasn't requested any Subprotocol. Closing Connection")
60 return await websocket
.close()
62 if websocket
.subprotocol
:
63 logging
.info("Protocols Matched: %s", websocket
.subprotocol
)
65 logging
.warning('Protocols Mismatched | Expected Subprotocols: %s,'
66 ' but client supports %s | Closing connection',
67 websocket
.available_subprotocols
,
69 return await websocket
.close()
71 charge_point_id
= path
.strip('/')
72 cp
= ChargePoint(charge_point_id
, websocket
)
74 # Start the ChargePoint instance to listen for incoming messages.
78 # Main function to start the WebSocket server.
80 # Create the WebSocket server and specify the handler for new connections.
81 server
= await websockets
.serve(
83 '127.0.0.1', # Listen on loopback.
85 subprotocols
=['ocpp2.0', 'ocpp2.0.1'] # Specify OCPP 2.0.1 subprotocols.
87 logging
.info("WebSocket Server Started")
88 # Wait for the server to close (runs indefinitely).
89 await server
.wait_closed()
92 # Entry point of the script.
93 if __name__
== '__main__':
94 # Run the main function to start the server.