OCPP 2.0.1 Test case TC_E_04 Local start transaction - Authorization first - Success

[rstanchak]

OCPP Version

OCPP2.0.1

Describe the problem

The purpose of TC_E_04 is to verify if the Charging Station is able to start a charging session when the EV driver first presents a form of identification, before connecting the EV and EVSE.

It is not clear how to satisfy this test case with libocpp on a multi-connector station because on_transaction_start has mandatory evse_id and connector_id arguments.

Am I missing something? I've replicated the test case and reusable state below for reference.

TC_E_04

Authorized (Local) reusable state

Describe your solution

No response

Additional context

TC_E_04 is a mandatory test case for OCPP 2.0.1 core profile certification.

[Pietfried]

Hi @rstanchak, thanks for reporting this issue. Currently the API of libocpp requires that the user application knows for which evse_id and connector_id the authorization is given. Inside libocpp a transaction is linked to an EVSE when it is started and therefore this information is required. Looking at the specification I found E01.FR.16:

After the EV is connected with the
Charging Station The next TransactionEventRequest SHALL contain evse.id AND
evse.connectorId.

So the issue you described is indeed present and we will work on making the API more flexible.