4 from datetime
import datetime
, timezone
5 from threading
import Timer
9 from ocpp
.routing
import on
10 from ocpp
.v201
.enums
import (
12 AuthorizationStatusType
,
14 RegistrationStatusType
,
18 from websockets
import ConnectionClosed
20 # Setting up the logging configuration to display debug level messages.
21 logging
.basicConfig(level
=logging
.DEBUG
)
26 class RepeatTimer(Timer
):
27 """Class that inherits from the Timer class. It will run a
28 function at regular intervals."""
31 while not self
.finished
.wait(self
.interval
):
32 self
.function(*self
.args
, **self
.kwargs
)
35 # Define a ChargePoint class inheriting from the OCPP 2.0.1 ChargePoint class.
36 class ChargePoint(ocpp
.v201
.ChargePoint
):
37 # Message handlers to receive OCPP messages.
38 @on(Action
.BootNotification
)
39 async def on_boot_notification(self
, charging_station
, reason
, **kwargs
):
40 logging
.info("Received %s", Action
.BootNotification
)
41 # Create and return a BootNotification response with the current time,
42 # an interval of 60 seconds, and an accepted status.
43 return ocpp
.v201
.call_result
.BootNotification(
44 current_time
=datetime
.now(timezone
.utc
).isoformat(),
46 status
=RegistrationStatusType
.accepted
,
50 async def on_heartbeat(self
, **kwargs
):
51 logging
.info("Received %s", Action
.Heartbeat
)
52 return ocpp
.v201
.call_result
.Heartbeat(
53 current_time
=datetime
.now(timezone
.utc
).isoformat()
56 @on(Action
.StatusNotification
)
57 async def on_status_notification(
58 self
, timestamp
, evse_id
: int, connector_id
: int, connector_status
, **kwargs
60 logging
.info("Received %s", Action
.StatusNotification
)
61 return ocpp
.v201
.call_result
.StatusNotification()
64 async def on_authorize(self
, id_token
, **kwargs
):
65 logging
.info("Received %s", Action
.Authorize
)
66 return ocpp
.v201
.call_result
.Authorize(
67 id_token_info
={"status": AuthorizationStatusType
.accepted
}
70 @on(Action
.TransactionEvent
)
71 async def on_transaction_event(
73 event_type
: TransactionEventType
,
81 case TransactionEventType
.started
:
82 logging
.info("Received %s Started", Action
.TransactionEvent
)
83 return ocpp
.v201
.call_result
.TransactionEvent(
84 id_token_info
={"status": AuthorizationStatusType
.accepted
}
86 case TransactionEventType
.updated
:
87 logging
.info("Received %s Updated", Action
.TransactionEvent
)
88 return ocpp
.v201
.call_result
.TransactionEvent(total_cost
=10)
89 case TransactionEventType
.ended
:
90 logging
.info("Received %s Ended", Action
.TransactionEvent
)
91 return ocpp
.v201
.call_result
.TransactionEvent()
93 @on(Action
.MeterValues
)
94 async def on_meter_values(self
, evse_id
: int, meter_value
, **kwargs
):
95 logging
.info("Received %s", Action
.MeterValues
)
96 return ocpp
.v201
.call_result
.MeterValues()
98 @on(Action
.GetBaseReport
)
99 async def on_get_base_report(
100 self
, request_id
: int, report_base
: ReportBaseType
, **kwargs
102 logging
.info("Received %s", Action
.GetBaseReport
)
103 return ocpp
.v201
.call_result
.GetBaseReport(
104 id_token_info
={"status": ReportBaseType
.accepted
}
107 # Request handlers to emit OCPP messages.
108 async def send_clear_cache(self
):
109 request
= ocpp
.v201
.call
.ClearCache()
110 response
= await self
.call(request
)
112 if response
.status
== ClearCacheStatusType
.accepted
:
113 logging
.info("%s successful", Action
.ClearCache
)
115 logging
.info("%s failed", Action
.ClearCache
)
117 async def send_get_base_report(self
):
118 request
= ocpp
.v201
.call
.GetBaseReport(
119 reportBase
=ReportBaseType
.ConfigurationInventory
121 response
= await self
.call(request
)
123 if response
.status
== ReportBaseType
.accepted
:
124 logging
.info("%s successful", Action
.GetBaseReport
)
126 logging
.info("%s failed", Action
.GetBaseReport
)
129 # Function to send OCPP command
130 async def send_ocpp_command(cp
, command_name
, delay
=None, period
=None):
133 case Action
.ClearCache
:
134 logging
.info("%s Send:", Action
.ClearCache
)
135 await cp
.send_clear_cache()
136 case Action
.GetBaseReport
:
137 logging
.info("%s Send:", Action
.GetBaseReport
)
138 await cp
.send_get_base_report()
141 f
"Not supported or Failure while processing command {command_name}"
145 await asyncio
.sleep(delay
)
148 my_timer
= RepeatTimer(
149 period
, asyncio
.create_task
, [cp
.send_ocpp_command(command_name
)]
154 # Function to handle new WebSocket connections.
155 async def on_connect(websocket
, path
):
156 """For every new charge point that connects, create a ChargePoint instance and start
157 listening for messages."""
159 requested_protocols
= websocket
.request_headers
["Sec-WebSocket-Protocol"]
161 logging
.info("Client hasn't requested any Subprotocol. Closing Connection")
162 return await websocket
.close()
164 if websocket
.subprotocol
:
165 logging
.info("Protocols Matched: %s", websocket
.subprotocol
)
168 "Protocols Mismatched | Expected Subprotocols: %s,"
169 " but client supports %s | Closing connection",
170 websocket
.available_subprotocols
,
173 return await websocket
.close()
175 charge_point_id
= path
.strip("/")
176 cp
= ChargePoint(charge_point_id
, websocket
)
182 except ConnectionClosed
:
183 logging
.info("ChargePoint %s closed connection", cp
.id)
184 ChargePoints
.remove(cp
)
185 logging
.debug("Connected ChargePoint(s): %d", len(ChargePoints
))
188 # Main function to start the WebSocket server.
190 # Define argument parser
191 parser
= argparse
.ArgumentParser(description
="OCPP2 Charge Point Simulator")
192 parser
.add_argument("--command", type=str, help="OCPP2 Command Name")
193 parser
.add_argument("--delay", type=int, help="Delay in seconds")
194 parser
.add_argument("--period", type=int, help="Period in seconds")
196 # Create the WebSocket server and specify the handler for new connections.
197 server
= await websockets
.serve(
199 "127.0.0.1", # Listen on loopback.
201 subprotocols
=["ocpp2.0", "ocpp2.0.1"], # Specify OCPP 2.0.1 subprotocols.
203 logging
.info("WebSocket Server Started")
205 args
= parser
.parse_args()
208 for cp
in ChargePoints
:
210 send_ocpp_command(cp
, args
.command
, args
.delay
, args
.period
)
213 # Wait for the server to close (runs indefinitely).
214 await server
.wait_closed()
217 # Entry point of the script.
218 if __name__
== "__main__":
219 # Run the main function to start the server.