question

Hi, the relevant documentation is here:

https://www.victronenergy.com/media/pg/Cerbo_GX/en/installation.html#UUID-c7db2b89-2d01-5e09-a678-4951c47b0d3d

Chapter 2.7

Usually, what is happening is that the GPS is not sending its data on the N2K format in the way we expect it.

Do you have actisense or some other tooling that allows you to make some screenshots of all details there mentioned in the manual, such as the NMEA2000 device class?

1) One USB port is changed to be “power only”
There are three USB ports in the Cerbo GX, and one has proven to be unreliable for use with a VE.Direct to USB cable or other data connections. We spent a lot of effort to make it work reliably, but that proved impossible – unfortunately. The other two do work properly.

The USB port affected is the one closest to the HDMI port. This new firmware version changes its function to “power only”: to power the GX Touch. The Cerbo GX manual as well as the datasheet have been updated with this new specification. Newly produced units will have a different marking on the product, to make it clear that that USB port is different than the other two.

Installations in which this port is now used, with for example a VE.Direct to USB Cable, will lose connection to that VE.Direct device. I fully understand how this can be very inconvenient, especially for remote installations.

Temporary work around for installations using that USB port

In case you prefer to change the wiring later, and keep a working system until then, here is what to do:

1. Revert to the previous installed firmware in the Settings -> Firmware -> Stored backup firmware menu. Now the USB port will work again.
2. Logging the VRM Portal won’t work yet. Normally, reverting to a prior firmware version does not cause an issue, but unfortunately this time it does. Only for Cerbo GX devices. Our support engineers will need to make a change in the VRM Portal after reverting to a version prior to v2.57. Without the change, no data will appear on the VRM Portal. To have that done, please contact your Dealer. They will need to contact our repairs department.
3. Finally, at a more convenient time, rewire the system and update to the new version. When required, the number of USB ports can be extended with a USB hub, refer to the manual for more information. As the issue causing an unreliable data connection is extremely rare, chances that you’ll have an issue while still using the port for a short while are very slim. There is no need to contact us again when doing the upgrade – only during the downgrade as explained in step 2.

Any solution? I connected my cerbo-gx with my SeaTalk NG network, but can't get gps signal of my Axiom+.