Connecting a charging station (OCPP)

Prerequisites

• A charging station supporting OCPP 1.6J or 2.0.1 (WebSocket / OCPP-J).
• Network access from the station to the internet (cloud) or to the same LAN as an EvEdge server.
• Access to the station's own management panel (usually a web UI at the station's IP).
• An Optimaatti account and a household to attach the station to.

Pairing details from Optimaatti

Open Optimaatti → Charge points → Add charge point. The service gives three values to enter on the station:

1. Station ID (identity): enter it in the station's "Charge point ID" field.
2. Connection address: in the form wss://<host>/ocpp/<id> → the station's "Central system URL". If it won't connect, try the address without the ID path segment.
3. Pairing token: the station's "AuthorizationKey" / Basic Auth password. Copy it immediately — shown only once. You can rotate it if needed.

Station OCPP settings (recommended)

The most important settings on a typical OCPP 1.6 station. Names match the standard OCPP keys; your station may show a subset.

• OcppSecurityProfile: use 1 (ws) or 2 (wss, recommended). Do not use 0 on a public network.
• HeartbeatInterval 240, WebSocketPingInterval 10: keeps the connection alive through NAT/firewalls.
• MeterValuesSampledData = Energy.Active.Import.Register, MeterValueSampleInterval 60: required for consumption and savings tracking — without it the energy counter won't grow.
• SupportedFeatureProfiles includes SmartCharging: required for power control (solar, spot and load management).
• AuthorizeRemoteTxRequests False: remote start from Optimaatti works without an extra authorization round.
• FreeModeActive: True = charging without an RFID tag (simplest for home use), False = RFID in use.
• Station's own load management (Master/Slave, Modbus TCP): set to Off when Optimaatti controls charging — two overlapping controllers fight each other.

OCPP 2.0.1 stations

Same three pairing values. Differences:

• The station offers ocpp2.0.1 in the handshake and the server prefers it automatically (2.0.1 > 1.6).
• Settings are configured as Device Model variables (the station vendor's UI handles this): heartbeat, metering interval and measurands as above.
• Optimaatti detects smart charging support automatically after the first connection.
• The charge point list shows an OCPP 2.0.1 badge once negotiation succeeds.

Commissioning checklist

• Station on the network and has an IP address.
• Charge point created in Optimaatti; ID, URL and token saved.
• URL, ID and AuthorizationKey entered on the station, saved and the station rebooted.
• Optimaatti shows the station as Online.
• Test charge: transaction visible in Optimaatti and the energy counter grows.
• Power control test: "Smart charging OK" turns green after the first accepted command.

Troubleshooting