ocpp 0.1.1

Python implementation of the Open Charge Point Protocol

OCPP

Python package implementing the JSON version of the Open Charge Point Protocol (OCPP). Currently only OCPP 1.6 is supported.

Installation

You can either install from Pypi:

$ pip install ocpp

Or install the package by running:

$ python setup.py install

Usage

Below you can find examples on how to create a simple charge point as well as a charge point.

Note: to run these examples the dependency websockets is required! Install it by running:

$  pip install websockets

Central system

import asyncio
import websockets
from datetime import datetime

from ocpp.routing import on
from ocpp.v16 import ChargePoint as cp
from ocpp.v16.enums import Action, RegistrationStatus
from ocpp.v16 import call_result


class ChargePoint(cp):
    @on(Action.BootNotification)
    def on_boot_notitication(self, charge_point_vendor, charge_point_model, **kwargs):
        return call_result.BootNotificationPayload(
	    current_time=datetime.utcnow().isoformat(),
	    interval=10,
	    status=RegistrationStatus.accepted
	)


async def on_connect(websocket, path):
    """ For every new charge point that connects, create a ChargePoint instance
    and start listening for messages.

    """
    charge_point_id = path.strip('/')
    cp = ChargePoint(charge_point_id, websocket)

    await cp.start()


async def main():
    server = await websockets.serve(
        on_connect,
        '0.0.0.0',
        9000,
        subprotocols=['ocpp1.6']
    )

    await server.wait_closed()


if __name__ == '__main__':
    asyncio.run(main())

Charge point

import asyncio
import websockets

from ocpp.v16 import call, ChargePoint as cp
from ocpp.v16.enums import RegistrationStatus


class ChargePoint(cp):
    async def send_boot_notification(self):
        request = call.BootNotificationPayload(
            charge_point_model="Optimus",
            charge_point_vendor="The Mobility House"
        )

        response = await self.call(request)

        if response.status ==  RegistrationStatus.accepted:
            print("Connected to central system.")


async def main():
    async with websockets.connect(
        'ws://localhost:9000/CP_1',
         subprotocols=['ocpp1.6']
    ) as ws:

        cp = ChargePoint('CP_1', ws)

        await asyncio.gather(cp.start(), cp.send_boot_notification())


if __name__ == '__main__':
    asyncio.run(main())

License

Except from the documents in docs/v16/specification/ everything is licensed under MIT. © The Mobility House.

The documents in docs/v16/specification/ are licensed under Creative Commons Attribution-NoDerivatives 4.0 International Public License.