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1 | import asyncio |
2 | import logging | |
fa16d389 S |
3 | from datetime import datetime, timezone |
4 | ||
1a0d2c47 | 5 | import websockets |
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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 | |
10 | ||
11 | # Setting up the logging configuration to display debug level messages. | |
12 | logging.basicConfig(level=logging.DEBUG) | |
13 | ||
1a0d2c47 | 14 | |
fa16d389 S |
15 | # Define a ChargePoint class inheriting from the OCPP 2.0.1 ChargePoint class. |
16 | class ChargePoint(cp): | |
1a0d2c47 JB |
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(), | |
25 | interval=10, | |
26 | status=RegistrationStatusType.accepted | |
27 | ) | |
28 | ||
29 | # Define a handler for the GetBaseReport message. | |
30 | @on('GetBaseReport') | |
31 | async def on_get_base_report(self, request_id, report_base, **kwargs): | |
32 | try: | |
33 | logging.info( | |
34 | f"Received GetBaseReport request with RequestId: {request_id} and ReportBase: {report_base}") | |
35 | ||
36 | # Create a mock response for demonstration purposes, indicating the report is accepted. | |
37 | response = call_result.GetBaseReport( | |
38 | status=GenericDeviceModelStatusType.accepted | |
39 | ) | |
40 | ||
41 | logging.info(f"Sending GetBaseReport response: {response}") | |
42 | return 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 | |
49 | ) | |
50 | ||
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51 | |
52 | # Function to handle new WebSocket connections. | |
53 | async def on_connect(websocket, path): | |
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54 | """ For every new charge point that connects, create a ChargePoint instance and start |
55 | listening for messages.""" | |
56 | try: | |
57 | requested_protocols = websocket.request_headers['Sec-WebSocket-Protocol'] | |
58 | except KeyError: | |
59 | logging.info("Client hasn't requested any Subprotocol. Closing Connection") | |
60 | return await websocket.close() | |
61 | ||
62 | if websocket.subprotocol: | |
63 | logging.info("Protocols Matched: %s", websocket.subprotocol) | |
64 | else: | |
65 | logging.warning('Protocols Mismatched | Expected Subprotocols: %s,' | |
66 | ' but client supports %s | Closing connection', | |
67 | websocket.available_subprotocols, | |
68 | requested_protocols) | |
69 | return await websocket.close() | |
70 | ||
71 | charge_point_id = path.strip('/') | |
72 | cp = ChargePoint(charge_point_id, websocket) | |
73 | ||
74 | # Start the ChargePoint instance to listen for incoming messages. | |
75 | await cp.start() | |
76 | ||
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77 | |
78 | # Main function to start the WebSocket server. | |
79 | async def main(): | |
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80 | # Create the WebSocket server and specify the handler for new connections. |
81 | server = await websockets.serve( | |
82 | on_connect, | |
83 | '127.0.0.1', # Listen on loopback. | |
84 | 9000, # Port number. | |
85 | subprotocols=['ocpp2.0', 'ocpp2.0.1'] # Specify OCPP 2.0.1 subprotocols. | |
86 | ) | |
87 | logging.info("WebSocket Server Started") | |
88 | # Wait for the server to close (runs indefinitely). | |
89 | await server.wait_closed() | |
90 | ||
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91 | |
92 | # Entry point of the script. | |
93 | if __name__ == '__main__': | |
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94 | # Run the main function to start the server. |
95 | asyncio.run(main()) |