Cerbo app on Garmin GPSMap 923 via GMS 10

Q&A and troubleshooting
, , ,
1

I have added GMS 10 (Garmin ethernet switch) to my Garmin network to connect my radar to two plotters (GPSMap 923 and GPSMap 820). Since Cerbo should also support connecting to newer Garmin MFD devices via ethernet, I have decided to try it out.

I have switched Cerbo to connect to my local LAN via WiFi to free up the ethernet port. Then I have connected Cerbo via ethernet cable to Garmin GMS 10. It seems that Cerbo get IP address from Garmin DHCP server:

image
image800×466 43.3 KB

But when I check for Victron icon on my GPSMap 923, there is none. I have also checked documentation and it seems I have all needed settings (MQTT), even though I am not sure as I have new UI and the documentation is for old UI.

image
image2100×662 36.2 KB

Also, the app works on my WiFi if I access it via https://venus.local/app/

BTW, I have also noticed another side effect of Cerbo connected to GMS 10: when Cerbo is connected to GMS 10, then shutting down my Garmin plotter does not shutdown GMS 10 anymore. GMS 10 stays On (consuming power) even when my plotters are shutdown/Off. When I disconnect Cerbo from GMS 10, then Power off of plotter also shutdowns the GMS 10 switch.

Note: using latesest beta 3.53~2 firmware.

2

Is it possible to enable MQTT Plaintext on new UI as required in docs?

image
image1262×556 57 KB

Or is this now handled with new security modes? I use Secured:

image
image2242×798 66.5 KB

3

I was able to spend some more time today with this setup.

Result: Cerbo Venus app shows on GPSMap 923 only if Cerbo security profile is set to None.

If I have set the profile to Secured, no Venus app appear on the plotter.

If I have set the profile to Weak, Venus app appears on plotter, but when I start it I just get “Searching for OneHelm Device Victron” message.

If I set profile to None, Venus app appears on plotter and I can open the app and it works.

However, I have found even bigger problem with Cerbo GX connected via Ethernet to Garmin GMS 10 network switch: when Cerbo is connected, when my NMEA2000 network is turned on, my GPSMap 923 plotter auto-starts (even though I have Auto-power-on turned to OFF) and then fails in “Recovery Loader Ready” screen. I have to turn of power on NMEA2000 network again to recover.
I have to disconnect Cerbo GX from Garmin ethernet in order to get GSMMap 923 to work again.

It seems that Cerbo is doing something on Garmin network that confuses GPSMap plotters.