OCPP 2.0.1 CSMS Server API

Complete developer guide and payload reference for the OCPP 2.0.1 Central Services Management System (CSMS).

Hybrid Architecture: The CSMS handles concurrent client WebSocket links from chargers, while hosting an HTTP REST API to allow remote control commands from external apps.

Default Port Configurations

Interface	Protocol / Path	Port	Access Scope
WebSocket (CP Connection)	`ws://<host>/csms2/<chargePointId>` (Profile 1) `wss://<host>/csms2/<chargePointId>` (Profile 2 & 3)	`9779`	Charge Point Handshake (subprotocol `ocpp2.0.1`)
HTTP REST API	`POST /remote`	`9779`	Internal Systems / Admin Controls

OCPP 2.0.1 Security Profiles

The CSMS fully supports the OCA Security Extensions and provides three communication profiles:

Security Profile 1 (Basic Auth): Unencrypted WebSocket connection using basic authentication credentials verified during connection handshake. Rejects connections on credential expiry (90 days configurable).
Security Profile 2 (Server TLS + Basic Auth): Secure WebSocket connection wrapped in TLS (using wss://). Enforces connection encryption via proxy headers or scheme verification, rejecting unsecure connection attempts with a 400 Bad Request. Chargers authenticate using hashed credentials stored in the CSMS database. Supports account lockout (15-minute freeze after 5 successive bad attempts), configurable password expiry (rejects connections on stale credentials), and administrative password rotation/generation.
Security Profile 3 (mTLS + Basic Auth + Fingerprint Binding): Mutual TLS WebSocket connection where both the server and client certificates are validated. In addition to certificate verification, the charger must authenticate using basic credentials (username and password) checked during the connection handshake. Enforces connection encryption, rejecting unsecure connection attempts. The CSMS verifies the client certificate signature chain against the configured Root/Intermediate CA, validates dates (checking expiry), checks revocation status using Certificate Revocation Lists (CRL) dynamically loaded from the certificate's Distribution Points, confirms the CN/SAN matches the target charger ID, and calculates its SHA-256 fingerprint to verify the database fingerprint binding. Rejection details (e.g. CERTIFICATE_EXPIRED, CERTIFICATE_REVOKED, CERTIFICATE_HOSTNAME_MISMATCH, CERTIFICATE_UNTRUSTED_CA) are audited individually.

WebSocket Protocol Frame Layout

All frames streaming over the WebSocket connection use the JSON-J frame structure defined by the OCPP specification:

JSON Frame Schema

[ <messageTypeId>, "<uniqueMessageId>", "<action>", <payload> ]

Element	Type	Value / Range	Description
`messageTypeId`	Integer	`2` (Call), `3` (CallResult), `4` (CallError)	Specifies the frame execution type.
`uniqueMessageId`	String	UUID/Auto-increment String	Correlates requests with response acknowledgements.
`action`	String	OCPP Message Action Name	Only present in Call (type `2`) frames.
`payload`	Object	JSON object	Action-specific data payload contents.

RequestStartTransaction (Remote Start)

Triggers a remote transaction start on a connected Charge Point.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "RequestStartTransaction",
  "payload": {
    "idTag": "abc",
    "connectorId": 1
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"RequestStartTransaction"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.idTag`	String	Required	The authorization ID token (RFID tag string, e.g. `"abc"`) to start charging.
`payload.connectorId`	Integer	Optional	The connector index on the EVSE. Defaults to `1`.

RequestStopTransaction (Remote Stop)

Stops an active charging transaction remotely.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "RequestStopTransaction",
  "payload": {
    "transactionId": "tx-123"
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"RequestStopTransaction"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.transactionId`	String	Required	The unique identifier of the active transaction to stop.

Reset (Reboot)

Commands the Charge Point to perform a hardware reset.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "Reset",
  "payload": {
    "type": "Immediate"
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"Reset"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.type`	String	Required	The reset execution type: `Immediate` (Hard reset) or `OnIdle` (Soft reset).

UnlockConnector

Force unlocks a physical socket connection on an EVSE.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "UnlockConnector",
  "payload": {
    "evseId": 1,
    "connectorId": 1
  }
}

{
  "status": "Unlocked"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"UnlockConnector"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.connectorId`	Integer	Required	The target connector index to unlock.
`payload.evseId`	Integer	Optional	The EVSE containing the connector. Defaults to `1`.

ChangeAvailability

Modifies operational statuses on connector/EVSE hardware components.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "ChangeAvailability",
  "payload": {
    "connectorId": 1,
    "type": "Inoperative"
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"ChangeAvailability"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.connectorId`	Integer	Required	The connector index on the EVSE to change availability. Use `0` for the entire Charge Point.
`payload.type`	String	Required	The target availability state: `Operative` or `Inoperative`.

ClearCache

Clears the local authorization cache tables stored inside the Charge Point.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "ClearCache",
  "payload": {}
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"ClearCache"`).
`payload`	Object	Required	Empty object `{}`. No additional parameters required.

GetVariables / SetVariables

Queries or modifies internal configuration variables inside the Charge Point device.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "GetVariables",
  "payload": {
    "key": "AuthCtrlr.Enabled"
  }
}

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "SetVariables",
  "payload": {
    "key": "AuthCtrlr.Enabled",
    "value": "true"
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"GetVariables"` or `"SetVariables"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.key`	String	Required	The dot-notation variable key string (e.g. `"AuthCtrlr.Enabled"`).
`payload.value`	String	Required (Set only)	The attribute value string to assign (only required for `SetVariables`).

SendLocalList

Sends an authorization list version updates to the local database of the Charge Point.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "SendLocalList",
  "payload": {
    "listVersion": 2,
    "updateType": "Full",
    "localAuthorizationList": [
      {
        "idTag": "abc",
        "idTagInfo": {
          "status": "Accepted"
        }
      }
    ]
  }
}

{
  "status": "Accepted"
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"SendLocalList"`).
`payload`	Object	Required	Object containing the request parameters.
`payload.listVersion`	Integer	Required	The version number of this local authorization list. Must be positive.
`payload.updateType`	String	Required	The list update type execution: `Full` (Overwrite list) or `Differential` (Patch list updates).
`payload.localAuthorizationList`	Array of Objects	Optional	List of credentials consisting of: `idTag` (String): The token identifier string (e.g. RFID value). `idTagInfo` (Object): Auth validation metadata (e.g. status `Accepted`).

GetLocalListVersion

Requests the current version number of the local authorization list from the Charge Point.

POST /remote

{
  "chargePointId": "tn001_cs001_cp001",
  "action": "GetLocalListVersion",
  "payload": {}
}

{
  "listVersion": 2
}

Field	Type	Status	Description
`chargePointId`	String	Required	The unique identifier of the target Charge Point (e.g. `"tn001_cs001_cp001"`).
`action`	String	Required	The OCPP action name to execute (must match `"GetLocalListVersion"`).
`payload`	Object	Required	Empty object `{}`. No additional parameters required.

GetSecurityLogs

Queries the recent security audit logs for a specific charger. Tracks access failures, lockout incidents, and certificate status changes.

GET /remote/security-logs?chargePointId=<chargePointId>

HTTP JSON Response Array

[
  {
    "id": 1,
    "chargePointId": "tn001_cs001_cp001",
    "event": "INVALID_PASSWORD_ATTEMPT",
    "severity": "WARN",
    "timestamp": "2026-07-03T11:00:00Z",
    "details": "Invalid password check from remote IP: 127.0.0.1"
  }
]

Rotate Credentials

Rotates the Basic Auth credentials hash in the database for a specific charger.

POST /remote/credentials/rotate?chargePointId=<id>&password=<password>

HTTP Response Status

"Credentials rotated successfully"

Generate Credentials

Generates a cryptographically secure random password, updates the Basic Auth hash in the database, sets the update timestamp, and returns the raw password in the response.

POST /remote/credentials/generate?chargePointId=<id>

HTTP Response (Plaintext Password)

"aB3dE5fG7hI9jK1lM3nO5pQ7"

Bind Fingerprint

Associates the client certificate's SHA-256 fingerprint value in the database to enable mutual TLS connections (Profile 3).

POST /remote/credentials/bind-fingerprint?chargePointId=<id>&fingerprint=<hash>

HTTP Response Status

"Certificate fingerprint bound successfully"

Change Security Profile

Updates the target charger's security profile (1, 2, or 3) inside the database to switch how the handshake is validated.

POST /remote/credentials/security-profile?chargePointId=<id>&profile=<1|2|3>

HTTP Response Status

"Security profile updated to 3 successfully"

GetSignedFirmwareUrl

Generates a temporary, HMAC-SHA256 cryptographically signed URL pointing to local server resources to allow secure charger firmware downloading over HTTPS.

GET /remote/firmware/sign-url?chargePointId=<id>&validityMs=3600000

HTTP Response URL

"http://localhost:9779/firmware/download/tn001_cs001_cp001?expires=1783023000000&signature=a9fbc746d..."

BootNotification (WebSocket)

Fires immediately when the Charge Point starts up to initialize registration status with the CSMS.

[
  2,
  "1",
  "BootNotification",
  {
    "reason": "PowerUp",
    "chargingStation": {
      "vendorName": "TechLabs",
      "model": "SmartChargerV2",
      "serialNumber": "TL-99238",
      "firmwareVersion": "2.0.1-v1.4"
    }
  }
]

[
  3,
  "1",
  {
    "currentTime": "2026-06-24T10:14:26Z",
    "interval": 30,
    "status": "Accepted"
  }
]

Field	Type	Status	Description
`reason`	String	Required	The reason for sending the boot notification. E.g. `PowerUp`, `SystemReset`, `Triggered`.
`chargingStation`	Object	Required	Object containing physical charger details.
`chargingStation.vendorName`	String	Required	Name of the charger hardware vendor.
`chargingStation.model`	String	Required	Model designation of the charger hardware.
`chargingStation.serialNumber`	String	Optional	Serial number of the physical charger.
`chargingStation.firmwareVersion`	String	Optional	Firmware version currently loaded on the charger.
`chargingStation.chargeBoxSerialNumber`	String	Optional	Legacy charge box serial number mapping.
`status` (Response)	String	Required	CSMS registration decision status: `Accepted`, `Pending`, `Rejected`.
`interval` (Response)	Integer	Required	Requested heartbeat interval frequency in seconds.
`currentTime` (Response)	String	Required	CSMS server clock timestamp in ISO 8601 UTC format.

Heartbeat (WebSocket)

Sent periodically by the Charge Point to signal that it is online and running. Also synchronizes server time.

[
  2,
  "2",
  "Heartbeat",
  {}
]

[
  3,
  "2",
  {
    "currentTime": "2026-06-24T10:14:30Z"
  }
]

Field	Type	Status	Description
Request Payload is empty (`{}`).
`currentTime` (Response)	String	Required	Current server time in ISO 8601 UTC format synchronizing the charger clock.

Authorize (WebSocket)

Authorizes an RFID tag/token value before allowing transaction operations.

[
  2,
  "2",
  "Authorize",
  {
    "idToken": {
      "idToken": "abc",
      "type": "RFID"
    }
  }
]

[
  3,
  "2",
  {
    "idTokenInfo": {
      "status": "Accepted"
    }
  }
]

Field	Type	Status	Description
`idToken`	Object	Required	Container for identifier token information.
`idToken.idToken`	String	Required	The authorization identifier tag string (e.g. RFID hexadecimal value).
`idToken.type`	String	Required	The authorization type. E.g. `RFID`, `Central`, `Keycode`, `eMAID`.
`idTokenInfo` (Response)	Object	Required	Container for status information of the identifier.
`idTokenInfo.status` (Response)	String	Required	Authorization decision status. E.g. `Accepted`, `Blocked`, `Expired`, `Invalid`.

TransactionEvent (WebSocket)

Controls active session telemetry, energy measurements, and start/stop transaction states.

[
  2,
  "3",
  "TransactionEvent",
  {
    "eventType": "Started",
    "timestamp": "2026-06-24T10:15:00Z",
    "triggerReason": "Authorized",
    "seqNo": 0,
    "transactionInfo": {
      "transactionId": "tx-123",
      "chargingState": "Charging"
    },
    "evse": {
      "id": 1,
      "connectorId": 1
    },
    "idToken": {
      "idToken": "abc",
      "type": "RFID"
    },
    "meterValue": [
      {
        "timestamp": "2026-06-24T10:15:00Z",
        "sampledValue": [
          {
            "value": "100",
            "measurand": "Energy.Active.Import.Register",
            "unit": "Wh"
          }
        ]
      }
    ]
  }
]

[
  2,
  "4",
  "TransactionEvent",
  {
    "eventType": "Updated",
    "timestamp": "2026-06-24T10:20:00Z",
    "triggerReason": "MeterValuePeriodic",
    "seqNo": 1,
    "transactionInfo": {
      "transactionId": "tx-123",
      "chargingState": "Charging"
    },
    "evse": {
      "id": 1,
      "connectorId": 1
    },
    "meterValue": [
      {
        "timestamp": "2026-06-24T10:20:00Z",
        "sampledValue": [
          {
            "value": "150",
            "measurand": "Energy.Active.Import.Register",
            "unit": "Wh"
          }
        ]
      }
    ]
  }
]

[
  2,
  "5",
  "TransactionEvent",
  {
    "eventType": "Ended",
    "timestamp": "2026-06-24T10:25:00Z",
    "triggerReason": "StopAuthorized",
    "seqNo": 2,
    "transactionInfo": {
      "transactionId": "tx-123",
      "chargingState": "Idle"
    },
    "evse": {
      "id": 1,
      "connectorId": 1
    },
    "idToken": {
      "idToken": "abc",
      "type": "RFID"
    },
    "meterValue": [
      {
        "timestamp": "2026-06-24T10:25:00Z",
        "sampledValue": [
          {
            "value": "200",
            "measurand": "Energy.Active.Import.Register",
            "unit": "Wh"
          }
        ]
      }
    ]
  }
]

[
  3,
  "3",
  {}
]

Field	Type	Status	Description
`eventType`	String	Required	The event status type: `Started`, `Updated`, or `Ended`.
`timestamp`	String	Required	ISO 8601 UTC timestamp of event generation.
`triggerReason`	String	Required	Trigger reason: `Authorized`, `CableDisconnect`, `ChargingStateChanged`, `EnergyLimitReached`, `RemoteStart`, `RemoteStop`, `MeterValuePeriodic`.
`seqNo`	Integer	Required	Incremental sequence number counter for ordering.
`transactionInfo`	Object	Required	Details about the active transaction.
`transactionInfo.transactionId`	String	Required	Globally unique identifier string for the active charging session.
`transactionInfo.chargingState`	String	Optional	Current state of the charging process: `Charging`, `SuspendedEV`, `SuspendedEVSE`, `Finishing`, `Idle`.
`transactionInfo.stoppedReason`	String	Optional	Reason for stopping the transaction: `DeAuthorized`, `EmergencyStop`, `EVDisconnected`, `Local`, `UnlockCommand`.
`transactionInfo.remoteStartId`	Integer	Optional	Remote transaction start request correlation ID.
`evse`	Object	Required	Physical EVSE outlet parameters.
`evse.id`	Integer	Required	The unique EVSE index on the charger hardware.
`evse.connectorId`	Integer	Optional	The specific connector index within the EVSE unit.
`idToken`	Object	Optional	The authorization credential token initiating/ending the transaction.
`meterValue`	Array of Objects	Optional	Energy and power telemetry register measurements: `timestamp` (String): Telemetry reading timestamp. `sampledValue` (Array): Telemetry values (value, measurand e.g. `Energy.Active.Import.Register`, unit).

StatusNotification (WebSocket)

Transmits immediate physical availability state updates from the charger's plugs.

[
  2,
  "6",
  "StatusNotification",
  {
    "timestamp": "2026-06-24T10:14:00Z",
    "connectorStatus": "Available",
    "evseId": 1,
    "connectorId": 1
  }
]

[
  3,
  "6",
  {}
]

Field	Type	Status	Description
`timestamp`	String	Required	ISO 8601 UTC timestamp of status transition.
`connectorStatus`	String	Required	Plug occupancy status state: `Available`, `Occupied`, `Reserved`, `Unavailable`, `Faulted`.
`evseId`	Integer	Required	Target EVSE index.
`connectorId`	Integer	Required	Target connector index within the EVSE.

NotifyEvent (Fault Alerts)

Triggers immediate system fault notifications. Configures error variables in the CSMS databases.

[
  2,
  "7",
  "NotifyEvent",
  {
    "generatedAt": "2026-06-24T10:16:00Z",
    "seqNo": 0,
    "eventData": [
      {
        "eventId": 1,
        "timestamp": "2026-06-24T10:16:00Z",
        "trigger": "AlertOrCondition",
        "actualValue": "Faulted",
        "techCode": "InternalError",
        "techInfo": "Overheating detected",
        "cleared": false,
        "component": {
          "name": "Connector",
          "evse": {
            "id": 1,
            "connectorId": 1
          }
        },
        "variable": {
          "name": "Problem"
        }
      }
    ]
  }
]

[
  2,
  "8",
  "NotifyEvent",
  {
    "generatedAt": "2026-06-24T10:17:00Z",
    "seqNo": 1,
    "eventData": [
      {
        "eventId": 1,
        "timestamp": "2026-06-24T10:17:00Z",
        "trigger": "AlertOrCondition",
        "actualValue": "Available",
        "techCode": "NoError",
        "techInfo": "Temp normalized",
        "cleared": true,
        "component": {
          "name": "Connector",
          "evse": {
            "id": 1,
            "connectorId": 1
          }
        },
        "variable": {
          "name": "Problem"
        }
      }
    ]
  }
]

[
  3,
  "7",
  {}
]

Field	Type	Status	Description
`generatedAt`	String	Required	ISO 8601 UTC timestamp of event report generation.
`seqNo`	Integer	Required	Incremental sequence counter.
`eventData`	Array of Objects	Required	List of diagnostic alerts: `eventId` (Integer): Unique alert ID. `timestamp` (String): Timestamp when alert changed. `trigger` (String): Trigger rule type (e.g. `AlertOrCondition`). `actualValue` (String): Event parameter value (e.g. `"Faulted"`). `cleared` (Boolean): True if alert condition has resolved. `component` (Object): Target physical device block (e.g. name `"Connector"`). `variable` (Object): Parameter variable measured (e.g. name `"Problem"`).

NotifyReport (WebSocket)

Reports detailed component configuration inventories to the CSMS databases.

[
  2,
  "9",
  "NotifyReport",
  {
    "requestId": 1,
    "generatedAt": "2026-06-24T10:14:00Z",
    "seqNo": 0,
    "reportData": [
      {
        "component": {
          "name": "Connector",
          "evse": {
            "id": 1,
            "connectorId": 1
          }
        },
        "variable": {
          "name": "AvailabilityState"
        },
        "variableAttribute": [
          {
            "value": "Available"
          }
        ]
      }
    ]
  }
]

[
  3,
  "9",
  {}
]

Field	Type	Status	Description
`requestId`	Integer	Required	Correlation request reference identifier.
`generatedAt`	String	Required	ISO 8601 UTC timestamp of configuration snapshot.
`seqNo`	Integer	Required	Incremental sequence index.
`reportData`	Array of Objects	Required	Configuration inventory records containing: `component` (Object): Target logical component. `variable` (Object): Configuration setting name. `variableAttribute` (Array): Attributes (e.g. attribute `value` string).

NotifyMonitoringReport (WebSocket)

Fires to notify the CSMS of active alerts, component variables, and monitoring configuration logs.

[
  2,
  "10",
  "NotifyMonitoringReport",
  {
    "requestId": 1,
    "generatedAt": "2026-06-24T10:14:00Z",
    "seqNo": 0,
    "monitor": [
      {
        "id": "mon-1",
        "severity": "Critical",
        "component": {
          "name": "Connector",
          "instance": "plug-1",
          "evse": {
            "id": 1,
            "connectorId": 1
          }
        },
        "variable": {
          "name": "Problem",
          "instance": "temp-sensor"
        }
      }
    ]
  }
]

[
  3,
  "10",
  {}
]

Field	Type	Status	Description
`requestId`	Integer	Required	Correlation monitor request reference ID.
`generatedAt`	String	Required	ISO 8601 UTC report generation timestamp.
`seqNo`	Integer	Required	Incremental sequence number counter.
`monitor`	Array of Objects	Required	Monitored logic parameters: `id` (String): Unique monitor threshold rule ID. `severity` (String): Severity level: `Critical`, `Error`, `Warning`. `component` (Object): Target physical device component block. `variable` (Object): Monitored sensor variable parameter.

SecurityEventNotification (WebSocket)

Sent by the Charge Point to report physical tampering, diagnostic warnings, or internal security alarms.

[
  2,
  "11",
  "SecurityEventNotification",
  {
    "type": "TamperDetection",
    "timestamp": "2026-07-03T11:00:00Z",
    "techInfo": "Cabinet door opened"
  }
]

[
  3,
  "11",
  {}
]

SignCertificate (WebSocket)

Sent by the Charge Point to request certificate signing (CSR validation) from the Central System CA.

[
  2,
  "12",
  "SignCertificate",
  {
    "csr": "-----BEGIN CERTIFICATE REQUEST-----\nMOCK_CSR_DATA\n-----END CERTIFICATE REQUEST-----"
  }
]

[
  3,
  "12",
  {
    "status": "Accepted"
  }
]

LogStatusNotification (WebSocket)

Sent by the Charge Point to update the CSMS on the diagnostic or security logs upload progress.

[
  2,
  "13",
  "LogStatusNotification",
  {
    "status": "Uploaded",
    "requestId": 12
  }
]

[
  3,
  "13",
  {}
]

SignedUpdateFirmware (WebSocket)

Sent remotely by the CSMS to trigger a cryptographically signed firmware download and install sequence on the charger.

[
  2,
  "14",
  "SignedUpdateFirmware",
  {
    "requestId": 101,
    "firmware": {
      "location": "https://localhost:9779/firmware/download/tn001_cs001_cp001?expires=...",
      "retrieveDateTime": "2026-07-03T12:00:00Z",
      "signingCertificate": "-----BEGIN CERTIFICATE-----\n...",
      "signature": "304502210086..."
    }
  }
]

[
  3,
  "14",
  {
    "status": "Accepted"
  }
]

SignedFirmwareStatusNotification (WebSocket)

Sent by the Charge Point to update the CSMS on the installation status of a signed firmware binary.

[
  2,
  "15",
  "SignedFirmwareStatusNotification",
  {
    "status": "Installed",
    "requestId": 101
  }
]

[
  3,
  "15",
  {}
]