Implement the OCPI 2.2.1 Commands module to remotely start and stop an EV charging session between an eMSP and CPO
domain: evroaming.org · 5 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
Implement the Receiver interface on the CPO side to accept START_SESSION/STOP_SESSION requests sent by the eMSP (Sender)
Include evse_uid (mandatory) and, as of OCPI 2.2.1, the connector_id field in a START_SESSION request
Embed a unique identifier in the response_url passed with each command so the asynchronous CommandResult POST can be matched back to the original request
For STOP_SESSION, reference the Session.id of the session being stopped
Implement the Sender interface to receive the asynchronous CommandResult callback once the charge point responds via the CPO
Known gotchas
Some charge points require the cable to already be plugged in before accepting a remote start, others allow or even require starting before plug-in; behavior varies by hardware vendor
Command results arrive asynchronously via a callback to response_url, not in the synchronous HTTP response, which only acknowledges receipt
connector_id in START_SESSION is new as of OCPI 2.2.1; implementations built against earlier OCPI versions need updating
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