Connecting as a CPO

Register as a Charge Point Operator

To obtain control of Enua Charge Points via OCPP, you have to be registered as a Charge Point Operator (CPO). A CPO is an entity listed in the Enua Cloud to whom charge point data and control can be directed. There is an onboarding process to become an operator, which is free of charge. To start the process, send an email to contact@enua.io and we will get in touch.

Once you are a registered CPO, you will be listed in the Enua Installer App so electricians can select you at the point of installation. Charge Points then automatically route their data to you.

How the connection works

Each Enua charger connects to your CSMS as a standard OCPP-J WebSocket client (wss://). Enua opens and maintains the connection on behalf of the charger; your CSMS acts as the server. The charger's OCPP identity is its Charging Station serialNumber (the Enua Wallmount serial number — see Architecture & Topology).

During onboarding you provide, and we jointly confirm, the connection parameters:

Parameter	Description
CSMS endpoint	The `wss://` URL of your CSMS. May include the charger identity in the path.
OCPP version	`ocpp2.0.1` or `ocpp1.6`, negotiated as the WebSocket subprotocol.
Credentials	A per-charger identity and password, sent as HTTP Basic authentication on the WebSocket upgrade request.

Authentication

Enua authenticates to your CSMS using HTTP Basic authentication over TLS — the Authorization: Basic header on the WebSocket upgrade request, carrying the charger identity and its password. This corresponds to OCPP Security Profile 1/2.

Note

Security Profile 3 (mutual TLS with client certificates) and OCPP certificate management are not currently supported. See Deviations from the Standard.

Connection and boot handshake

Once the WebSocket is established, the charger boots onto your CSMS by sending a BootNotification. Your CSMS replies with an interval and a status; on Accepted the charger begins its normal Heartbeat and StatusNotification traffic.

sequenceDiagram
    participant CS as Enua Charging Station
    participant CSMS as Your CSMS
    CS->>CSMS: WebSocket upgrade (wss, Basic auth, subprotocol ocpp2.0.1/ocpp1.6)
    CSMS-->>CS: 101 Switching Protocols
    CS->>CSMS: BootNotification
    CSMS-->>CS: BootNotificationResponse {status: Accepted, interval, currentTime}
    CS->>CSMS: StatusNotification (Available)
    loop every <interval> seconds
        CS->>CSMS: Heartbeat
        CSMS-->>CS: HeartbeatResponse {currentTime}
    end