Does this code works for anyone ?

[gyzod]

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'

[rzylius]

Hi, the code works for me, but I guess it may depend on specific implementation of the protocol in your charger.

e.g. from log it seems that the message you received does not conform to the expected OCPP format. The CallError class expects three arguments: error_code, error_description, and optionally error_details. However, the received message does not provide these elements.

What is the charger? does it implement ocpp v1.6, maybe there are caveats? e.g. my charger Elinta had settings which I had to change in order to be able to send profile commad with max current.