# Internet and network

The controller manages your installation (battery, inverter, etc.) and communicates with both the Voltmasters platform and your on-site equipment. Most communication is outbound: the controller "calls out" to the cloud and to your devices. You typically do not need to open any inbound ports for normal operation.

**Requirements**

* Static IP or DHCP configuration
* Stable internet connection at the location where the controller is installed. Wired network.
* Access to the same local network (LAN) as your energy devices (inverter, battery controller, meter, etc.).
* Allow outbound internet access for the controller. Ports 1883, 22, and 443 must be open.
* DNS must be functional.

**Linking to an EMS account**

A code is printed on the controller. When creating [**a new project**](https://platform.voltmasters.be/projects), enter this code as the Controller ID.