Ocpp Message

IMPORTANT. :class: warning

This message supports only the OCPP messages listed in the table below.

How the envelope is used

The ocpp_message envelope is used in three ways. Which one applies depends on the OCPP message being sent and on who sends it:

A. OEM impersonates the CSMS. The OEM sends a CSMS-to-CS request on cs/josev. Josev handles it locally, exactly as if the CSMS had sent it, and answers on josev/cs with the response the CSMS would have received. Nothing is sent to the CSMS.

B. Josev forwards a CSMS request to the OEM. The CSMS sends a request that Josev cannot answer itself. Josev forwards it on josev/cs (or ocpp/smart_charging), the OEM (or smart charging service) answers on the inverted topic, and Josev relays that answer to the CSMS.

C. OEM sends a CS-to-CSMS message through Josev. The OEM sends a CS-to-CSMS request on cs/josev. Josev sends it to the CSMS over the websocket and relays the CSMS response back on josev/cs.

In every case the response carries the request’s id. A failure is returned as a response with message_type CallError, never as a missing response.

Allowed messages and how Josev handles them

Message	Usage	Behaviour
GetVariables	A	Josev answers from its device model.
SetVariables	A	Josev applies the change to its device model and answers as the CS would.
SetNetworkProfile	A	Josev stores the connection profile in the given slot.
RequestStartTransaction	A	Josev runs its remote start flow, as for a CSMS remote start.
GetInstalledCertificateIds	A or B	Depends on who manages the certificates. If Josev does (default), the OEM can send this to get the certificates installed in Josev’s keystore (A). If certificate management is delegated to the OEM (EXTERNAL_CERTIFICATE_MANAGER=true), Josev forwards the CSMS request to the OEM, which must answer with its own certificates (B).
InstallCertificate	A or B	Same as GetInstalledCertificateIds: installed in Josev’s keystore (A), or forwarded to the OEM when certificate management is external (B).
DeleteCertificate	A or B	Same as GetInstalledCertificateIds.
CertificateSigned	A or B	Same as GetInstalledCertificateIds. If requestId is given it must match a SignCertificate Josev is waiting on, or the request is rejected.
SetChargingProfile	B	Forwarded by Josev on ocpp/smart_charging; the smart charging service answers. An OEM that sends it on cs/josev is also forwarded there.
ClearChargingProfile	B	Same as SetChargingProfile.
GetChargingProfiles	B	Same as SetChargingProfile.
GetCompositeSchedule	B	Same as SetChargingProfile.
UpdateDynamicSchedule	B	Same as SetChargingProfile (OCPP 2.1 only).
SignCertificate	C	Sent to the CSMS; the CSMS response is relayed. The signed certificate arrives later as a CertificateSigned request from the CSMS.
NotifyEVChargingNeeds	C	Sent to the CSMS (OCPP 2.1); the CSMS response is relayed.
NotifyEvent	C	Sent to the CSMS; the CSMS response is relayed.
SecurityEvent	C	Sent to the CSMS as SecurityEventNotification; the CSMS response is relayed.
ReportChargingProfiles	C	Sent to the CSMS; the CSMS response is relayed.
SetDefaultTariff	A	OCPP 2.1. Allowed in the schema; not yet handled by Josev, which answers CallError.
GetTariffs	A	OCPP 2.1. Allowed in the schema; not yet handled by Josev, which answers CallError.
NotifySettlement	C	OCPP 2.1. Allowed in the schema; not yet handled by Josev, which answers CallError.

OcppMessageRequest

Description.

Used to embed OCPP request and response messages, allowing the OEM and Josev to exchange OCPP messages.

OCPP request messages can be sent by OEM or Josev using the MQTT OcppMessageRequest, where the CALL fields “Action” and “Payload” as defined in the OCPP specification (OCPP Ed.3 part 4 section 4.2.1) correspond to the “message_name” and the “payload” fields in the MQTT message.

OcppRequest

Topic: cs/josev or josev/cs. Used this message to embed an OCPP request message.
type	object
properties
id	type	string
	format	uuid
name	const	ocpp_message
type	const	request
data	type	object
	properties
	ocpp_version	type	string
		enum	ocpp1.6, ocpp2.0.1, ocpp2.1
	message_name	type	string
		enum	GetVariables, GetInstalledCertificateIds, SetVariables, InstallCertificate, DeleteCertificate, SetNetworkProfile, CertificateSigned, SignCertificate, NotifyEVChargingNeeds, UpdateDynamicSchedule, SetChargingProfile, NotifyEvent, SecurityEvent, ClearChargingProfile, GetChargingProfiles, GetCompositeSchedule, ReportChargingProfiles, NotifySettlement, SetDefaultTariff, GetTariffs, RequestStartTransaction
	payload	The payload is the OCPP request message payload. It is an object with the properties defined by the OCPP message schema.
		type	object

Example:

message = {
    "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
    "name": "ocpp_message",
    "type": "request",
    "data": {
       "ocpp_version": "ocpp2.0.1",
        "message_name": "GetVariables",
        "payload": {
            "getVariableData": [
                {"component": {"name": "TxCtrlr"}, "variable": {"name": "TxStartPoint"}}
            ]
        }
    }
}

OcppMessageResponse

Ocpp response messages can be sent by OEM or Josev using the MQTT OcppMessageResponse, where the CALLRESULT field “Payload” as defined in the OCPP specification (OCPP Ed.3 part 4 section 4.2.2) corresponds to the “payload” field in the MQTT message.

OcppResponse

Topic: josev/cs or cs/josev. Used this message to embed an OCPP response message.
type	object
properties
id	type	string
	format	uuid
name	const	ocpp_message
type	const	response
data	type	object
	properties
	ocpp_version	type	string
		enum	ocpp1.6, ocpp2.0.1, ocpp2.1
	message_type	type	string
		enum	CallResult, CallError
	payload	The payload is the OCPP response message payload. It is an object with the properties defined by the OCPP message schema.
		type	object
	error_code	The field must contain a string from the RPC Framework Error Codes Table.
		type	string
	error_description	The field must contain a string with a human-readable description of the error.
		type	string
		maxLength	255
	error_details	The field must contain an object with additional information about the error. The object can contain any additional information that can help to understand the error.
		type	object

Example:

message = {
    "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
    "name": "ocpp_message",
    "type": "response",
    "data": {
        "message_type": "CallResult", # or "CallError"
        "ocpp_version": "ocpp2.0.1",
        "payload": {
            "getVariableResult":[
                {
                "attributeStatus":"Accepted",
                "component":{"name":"TxCtrlr"},
                "variable":{"name":"TxStartPoint"},
                "attributeType":"Actual",
                "attributeValue":"Authorized,EVConnected"
                }
            ]
        }
    }
}

If an error is encounter while processing the request, the response will contain a message type CallError as described in the example below.

Example:

message = {
    "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
    "name": "ocpp_message",
    "type": "response",
    "data": {
        "message_type": "CallError",
        "ocpp_version": "ocpp2.0.1",
        "error_code": "FormatViolation",
        "error_description": "Payload for Action is syntactically incorrect or structure for Action"
        "error_details": {
            "details": "An internal error occurred"
        }
    }
}

OcppMessageRequest message examples:

Example GetVariables Multiple Variables:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.0.1",
    "message_name":"GetVariables",
    "payload":{
      "getVariableData":[
        {
          "attributeType":"Actual",
          "component":{
            "name":"OCPPCommCtrlr"
          },
          "variable":{
            "name":"OfflineThreshold"
          }
        },
        {
          "attributeType":"Actual",
          "component":{
            "name":"AuthCtrlr"
          },
          "variable":{
            "name":"LocalAuthorizeOffline"
          }
        }
      ]
    }
  }
}

Example GetInstalledCertificateIds:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.0.1",
    "message_name":"GetInstalledCertificateIds",
    "payload":{
      "certificateType": [
      "CSMSRootCertificate"
      ]
    }
  }
}

Example SetVariables:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "SetVariables",
    "payload": {
      "setVariableData": [
        {
          "attributeType": "Actual",
          "attributeValue": "300",
          "component": {
            "name": "OCPPCommCtrlr"
          },
          "variable": {
            "name": "OfflineThreshold"
          }
        },
        {
          "attributeType": "Actual",
          "attributeValue": "true",
          "component": {
            "name": "AuthCtrlr"
          },
          "variable": {
            "name": "LocalAuthorizeOffline"
          }
        }
      ]
    }
  }
}

Example InstallCertificate:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "InstallCertificate",
    "payload": {
      "certificate": "-----BEGIN CERTIFICATE-----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\nyS1DpSC11DclzOkvUw==\n-----END CERTIFICATE-----\n",
      "certificateType": "CSMSRootCertificate"
    }
  }
}

Example DeleteCertificate:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "DeleteCertificate",
    "payload": {
      "certificateHashData": {
        "hashAlgorithm": "SHA256",
        "issuerKeyHash": "6fb6606900c9143982873363e815ae67163667c5792cd919afd37783bbff3095",
        "issuerNameHash": "d1c53ae0a9d11dda803bf38fc580dc9869ffb234b561fa624a20e618ce4bb656",
        "serialNumber": "4"
      }
    }
  }
}

Example SetNetworkProfile:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "SetNetworkProfile",
    "payload": {
      "configurationSlot": 2,
      "connectionData": {
        "messageTimeout": 75,
        "ocppCsmsUrl": "wss://324595e6999a17ae.octt.openchargealliance.org:18603",
        "ocppInterface": "Wired0",
        "ocppTransport": "JSON",
        "ocppVersion": "OCPP20",
        "securityProfile": 2
      }
    }
  }
}

Example CertificateSigned:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "CertificateSigned",
    "payload": {
      "certificateChain": "-----BEGIN CERTIFICATE-----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\nrgqq1n32rktoZEUzP2W29xmKkQ==\n-----END CERTIFICATE-----",
      "certificateType": "V2GCertificate"
    }
  }
}

Example SignCertificate:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "request",
  "data": {
    "ocpp_version": "ocpp2.0.1",
    "message_name": "SignCertificate",
    "payload": {
      "csr": "-----BEGIN CERTIFICATE REQUEST-----\nMIIBNTCB2wIBADBKMRYwFAYDVQQDDA05NzgzMTYxNDg0MTAwMQ8wDQYDVQQKDAZT\nd2l0Y2gxCzAJBgNVBAYTAkdCMRIwEAYKCZImiZPyLGQBGRYCQ1MwWTATBgcqhkjO\nPQIBBggqhkjOPQMBBwNCAARoXZcBZ1c6zGw0aXBYq3vSsFMFYIXe9H8MJRnWXb2h\na0HhGW8tzH4VGk3+NFOBZdbvg2FaXzrGSYSsLgTQNObuoC8wLQYJKoZIhvcNAQkO\nMSAwHjAOBgNVHQ8BAf8EBAMCB4AwDAYDVR0TAQH/BAIwADAKBggqhkjOPQQDAgNJ\nADBGAiEAsQIGFrb+KkXhpwRHoNA9g/7dp9rKzmhxLvSH81Zwj+MCIQC9RiTISte0\nSnBGle3oydnj7SskFtucdCqA7jeomE0fNw==\n-----END CERTIFICATE REQUEST-----\n",
      "certificateType": "ChargingStationCertificate"
    }
  }
}

Example SetChargingProfile:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.0.1",
    "message_name":"SetChargingProfile",
    "payload":{
      "chargingProfile":{
        "evseId":1,
        "chargingProfile":{
          "id":1,
          "stackLevel":1,
          "chargingProfilePurpose":"TxProfile",
          "chargingProfileKind":"Dynamic",
          "chargingSchedule":[
            {
              "id":1,
              "chargingRateUnit":"W",
              "chargingSchedulePeriod":[
                {
                  "startPeriod":1,
                  "operationMode":"CentralSetpoint",
                  "setpoint":5000,
                  "setpointReactive":0
                }
              ]
            }
          ]
        }
      }
    }
  }
}

Example NotifyEVChargingNeeds:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.1",
    "message_name":"NotifyEVChargingNeeds",
    "payload":{
      "evseId":1,
      "chargingNeeds":{
        "requestedEnergyTransfer":"DC_BPT",
        "controlMode":"DynamicControl",
        "mobilityNeedsMode":"EVCC",
        "v2xChargingParameters":{
          "minChargePower":500,
          "maxChargePower":7000,
          "minDischargePower":500,
          "maxDischargePower":7000,
          "minChargeCurrent":2.2,
          "maxChargeCurrent":30,
          "minDischargeCurrent":2.2,
          "maxDischargeCurrent":30,
          "minVoltage":300,
          "maxVoltage":450,
          "evTargetEnergyRequest":65000,
          "evMinEnergyRequest":50000,
          "evMaxEnergyRequest":70000,
          "targetSoC":80
        },
        "departureTime":"2025-09-23T10:00:00Z"
      }
    }
  }
}

Example UpdateDynamicSchedule:

  message = {
    "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
    "name":"ocpp_message",
    "type":"request",
    "data":{
    "ocpp_version": "ocpp2.1",
    "message_name": "UpdateDynamicSchedule",
    "payload": {
        "chargingProfileId": 1,
        "scheduleUpdate": {
            "setpoint": 5000,
            "setpointReactive": 0
        }
    }
}

}

Example NotifySettlement:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.1",
    "message_name":"NotifySettlement",
    "payload":{
      "transactionId":"b1c2d3e4-5f60-4a7b-8c9d-0e1f2a3b4c5d",
      "pspRef":"PSP-2026-000123456",
      "status":"Settled",
      "settlementAmount":12.45,
      "settlementTime":"2026-09-22T14:32:10Z"
    }
  }
}

Example SetDefaultTariff:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.1",
    "message_name":"SetDefaultTariff",
    "payload":{
      "evseId":0,
      "tariff":{
        "tariffId":"tariff-default-2026-q4",
        "currency":"EUR",
        "description":[
          {
            "language":"en",
            "content":"0.35 EUR/kWh"
          }
        ],
        "energy":{
          "prices":[
            {"priceKwh":0.35}
          ],
          "taxRates":[
            {"type":"VAT","tax":21.0}
          ]
        },
        "validFrom":"2026-10-01T00:00:00Z"
      }
    }
  }
}

Example GetTariffs:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.1",
    "message_name":"GetTariffs",
    "payload":{
      "evseId":1
    }
  }
}

Example RequestStartTransaction:

message = {
  "id":"2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name":"ocpp_message",
  "type":"request",
  "data":{
    "ocpp_version":"ocpp2.0.1",
    "message_name":"RequestStartTransaction",
    "payload":{
      "remoteStartId":12345,
      "evseId":1,
      "idToken":{
        "idToken":"046DE3A0BA2A80",
        "type":"ISO14443"
      }
    }
  }
}

OcppMessageResponse message examples:

Example GetInstalledCertificateIds response:

message = {
    "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
    "name": "ocpp_message",
    "type": "response",
    "data": {
        "message_type": "CallResult", # or "CallError"
        "ocpp_version": "ocpp2.0.1",
        "payload": {
          "status":"Accepted",
          "certificateHashDataChain":[{
            "certificateType":
            "CSMSRootCertificate",
            "certificateHashData":{
              "hashAlgorithm":"SHA256",
              "issuerNameHash":"de61235ee2958b67c7a47469cccb7ccbf77501d57af72c437ca092467fa00cac",
              "issuerKeyHash":"84c8c4dfdec3696e58c124c76ed430f20c6fbcfaec0c4fbbe77b834c54d12e27",
              "serialNumber":"2"
            }
          }]
        }
    }
}

Example SetVariables response:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
    "message_type": "CallResult",  # or "CallError"
    "ocpp_version": "ocpp2.0.1",
    "payload": {
      "setVariableResult": [
        {
          "attributeStatus": "Accepted",
          "component": {
            "name": "OCPPCommCtrlr"
          },
          "variable": {
            "name": "OfflineThreshold"
          },
          "attributeType": "Actual"
        },
        {
          "attributeStatus": "Accepted",
          "component": {
            "name": "AuthCtrlr"
          },
          "variable": {
            "name": "LocalAuthorizeOffline"
          },
          "attributeType": "Actual"
        }
      ]
    }
  }
}

Example CertificateSigned response:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
    "message_type": "CallResult",  # or "CallError"
    "ocpp_version": "ocpp2.0.1",
    "payload": {
      "status": "Accepted"
    }
  }
}

Example CertificateSigned response::

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
    "message_type": "CallResult",  # or "CallError"
    "ocpp_version": "ocpp2.0.1",
    "payload": {
      "status": "Accepted"
    }
  }

Example SetChargingProfile response:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
        "message_type": "CallResult",  # or "CallError"
        "ocpp_version": "ocpp2.0.1",
        "payload": {
          "status": "Accepted" # or "Rejected"
        }
  }
}

Example NotifyEVChargingNeeds response::

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
        "message_type": "CallResult",  # or "CallError"
        "ocpp_version": "ocpp2.1",
        "payload": {
          "status": "Accepted" # or "Rejected" or "Processing"
        }
  }
}

Example UpdateDynamicSchedule response::

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
        "message_type": "CallResult",  # or "CallError"
        "ocpp_version": "ocpp2.1",
        "payload": {
          "status": "Accepted" # or "Rejected"
        }
  }
}

Example RequestStartTransaction response:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
    "message_type": "CallResult",  # or "CallError"
    "ocpp_version": "ocpp2.0.1",
    "payload": {
      "status": "Accepted",  # or "Rejected"
      "transactionId": "b1c2d3e4-5f60-4a7b-8c9d-0e1f2a3b4c5d"
    }
  }
}

Example GetTariffs response:

message = {
  "id": "2b0aa109-21a1-4f2f-bdbd-6cdf139e7bb1",
  "name": "ocpp_message",
  "type": "response",
  "data": {
    "message_type": "CallResult",  # or "CallError"
    "ocpp_version": "ocpp2.1",
    "payload": {
      "status": "Accepted",  # or "Rejected"
      "tariff": {
        "tariffId": "tariff-default-2026-q4",
        "currency": "EUR",
        "validFrom": "2026-10-01T00:00:00Z"
      }
    }
  }
}