OCPP 1.6J Message Reference

Complete reference for OCPP 1.6J messages with examples, schemas, and common use cases.

Core

BootNotification

CP->CSMS

Sent by the Charge Point to notify the Central System that it has booted and is ready to accept messages.

Heartbeat

CP->CSMS

Sent periodically by the Charge Point to notify the Central System that it is still alive.

Authorize

CP->CSMS

Sent by the Charge Point to authorize an identifier (RFID tag, credit card, etc.) before starting a transaction.

StartTransaction

CP->CSMS

Sent by the Charge Point when a charging transaction starts.

StopTransaction

CP->CSMS

Sent by the Charge Point when a charging transaction ends.

StatusNotification

CP->CSMS

Sent by the Charge Point to notify the Central System of a status change on a connector.

MeterValues

CP->CSMS

Sent periodically during charging to report meter readings and other measurands.

ChangeConfiguration

CSMS->CP

Sent by the Central System to change a configuration parameter on the Charge Point.

GetConfiguration

CSMS->CP

Sent by the Central System to retrieve configuration parameters from the Charge Point.

Reset

CSMS->CP

Sent by the Central System to reset (reboot) the Charge Point.

DataTransfer

Both

Used for vendor-specific data exchange between Charge Point and Central System.

Remote Trigger

RemoteStartTransaction

CSMS->CP

Sent by the Central System to remotely start a charging transaction.

RemoteStopTransaction

CSMS->CP

Sent by the Central System to remotely stop a charging transaction.

Firmware Management

DiagnosticsStatusNotification

CP->CSMS

Sent by the Charge Point to notify about the status of a diagnostics file upload.

FirmwareStatusNotification

CP->CSMS

Sent by the Charge Point to notify about firmware update progress.