# ¶ Methods

We can integrate EV chargers using either:

- OCPP
- MQTT

# ¶ MQTT

Only the OpenEVSE / EmonEVSE supports MQTT for EV charger integration:

- Emon EVSE

# ¶ OCPP

We are developing the OCPP support for other brands of chargers. So far we can support:

- Sync EV
- Wallbox Pulsar Plus

We are using this homeassistant integration.

## ¶ Technical details

When we add the integration into homeassistant, it runs a server on port 9000. We expose this via nginx at `ws://IP_ADDRESS/ocpp/` for the websocket connection from the charger.

# ¶ Homeassistant integrations

Some other EV chargers have a custom homeassistant integration which we can use to interact with it:

- Zappi (myenergi)