ocpp-mqtt's Introduction

Simple implementation of the OCPP - MQTT bridge

Enables to send mqtt commands (and receive mqtt messages as responses and status updates, though not implemented right now). I use this bridge for managing charge station from OpenHAB.

Send mqtt commands to /ocpp/cmd

Poetry is used to manage dependencies.

To start program: poetry run python ./central_system.py

For automation needs I implemented these commands:

start (start charging)
stop
trigger
profile [arg] ( set charging profile, in my implementation argument is max current in Amps, message e.g. profile 8)
configuration (read local CP configuration)
change_configuration (set local CP configuration item)
exit (stop bridge)

Note: to provide secrets, you need to place .env file in the directory: MQTT_USERNAME=xxx MQTT_PASSWORD=xxx LISTEN_ADDR=0.0.0.0 TAG_ID=xxx

Note: check specific dependencies if implemented without poetry, as latest versions of some packages break functionalities.

Note: Every charge station may have peculiarities of OCPP implementation. The code is tested and fully works with:

Elinta Charge https://elintacharge.com/product/private-ev-charging-station-homebox-slim/

Dependencies and Contributions

OCPP implementation: https://github.com/mobilityhouse/ocpp

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ocpp-mqtt's Issues

Does this code works for anyone ?

I'm trying to build something from this code and I get errors about missing arguments in the lines self.call(payload) like this :

    async def set_charging_profile(self, amps, **kwargs):
        print('set_charging_profile')
        return await self.call(call.SetChargingProfilePayload(
            connector_id=1,
            cs_charging_profiles={
                'charging_profile_id': int(amps),
                'stack_level': 0,
                'charging_profile_purpose': ChargingProfilePurposeType.tx_profile,
                'charging_profile_kind': ChargingProfileKindType.absolute,
                'charging_schedule': {
                    'charging_rate_unit': ChargingRateUnitType.amps,
                    'charging_schedule_period': [{
                        'start_period': 0,
                        'limit': float(amps),
                    }]
                },
                'transaction_id': 112
            }
        ))

errors are :

{'cmd': 'availability', 'values': [{'state': 'Operative'}]}
Changing availability to Operative
INFO:ocpp:EVB-P20261797: send [2,"0a475978-ffdf-4b6d-a30a-8cc620defb01","ChangeAvailability",{"connectorId":1,"type":"Inoperative"}]
INFO:ocpp:EVB-P20261797: receive message [4,"0a475978-ffdf-4b6d-a30a-8cc620defb01"]
ERROR:ocpp:Unable to parse message: '[4,"0a475978-ffdf-4b6d-a30a-8cc620defb01"]', it doesn't seem to be valid OCPP: ProtocolError: Payload for Action is incomplete, {'cause': 'Message is missing elements.'}
Traceback (most recent call last):
  File "/home/pagag186/ocpp/ocpp-mqtt-gateway/venv/lib/python3.10/site-packages/ocpp/messages.py", line 103, in unpack
    return cls(*msg[1:])
TypeError: CallError.__init__() missing 2 required positional arguments: 'error_code' and 'error_description'

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rzylius / ocpp-mqtt Goto Github PK

ocpp-mqtt's Introduction

Simple implementation of the OCPP - MQTT bridge

Dependencies and Contributions

ocpp-mqtt's People

Contributors

Stargazers

Watchers

ocpp-mqtt's Issues

Does this code works for anyone ?

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