Cerbo GX Manual

3.7. Connecting both Ethernet and Wi-Fi (failover)

It is possible to connect the Cerbo GX to both Ethernet and Wi-Fi. In this case, the Cerbo GX will try to determine which interface

provides an active internet connection and then use that interface. When both have an active internet connection, the Ethernet

connection is used. The Cerbo GX will automatically check again for active internet connections when something changes on the

interfaces.

3.8. Minimize internet traffic

In situations where internet traffic is expensive, for example a satellite uplink or with roaming GSM/cellular charges, you may want

to minimize the internet traffic. The steps to take are:

• Disable auto-update

• Do not enable remote support

• Reduce the Logging interval to a very low frequency. Note that state changes (charging → inverting, or bulk→float) and also

alarms will cause extra messages to be sent

To find out how much data allowance you need to buy the best way is to let the system run for a couple of days and monitor the

internet RX and TX counters in your 3G or 4G router. Or even better, some mobile companies will report the data used via a

website.

The amount of data used is also very dependent on the system:

More products connected to the Cerbo GX will generate more data.

• A state change (from inverter to charger for example) will trigger a data transmission, so a system with very frequent state

changes will also tend to generate more data. This is especially true in certain Hub-1 and Hub-2 systems.

We recommend setting-up your data plan in such a way as to avoid costly 'excess' charges. Make sure you put a cap on your

data usage; or use a pre-paid plan.

One customer - burdened with global costs of between twenty cents and several euros per mb of data - invented a clever solu-

tion: Using a VPN he modified the IP to route ALL traffic to and from the GX device via his VPN. Using a firewall at the VPN

server allows him to control traffic according to time, connection type, place and destinations. Although this is beyond the scope

of this manual it works, and - with the help of a Linux and networking expert - it can work for you.

3.9. More information about setting up an internet connection and VRM

• Setting up a VRM account

• VRM Portal alarms and monitoring

• VRM Portal - Frequently asked questions

Cerbo GX Manual