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xzv avatar image
xzv asked

Bricked my Multiplus II GX during downgrade

Hi,

because I'm investigating a potential bug, I tried to downgrade my Multiplus II GX to a previous version.

I followed this guide which says it's okay to do this:

Note that while backporting is no problem in general, it may be that some settings are reset to their default values. Be sure to check this.

I loaded the .swu file (venus-swu-nanopi-20181016100243-v2.20.swu) from the nanopi folder onto an USB stick and started the downgrade via the Remote Console from v3.14 to v2.20.

After a while the screen went blank and this is the situation I'm stuck in.

screen.png

The GX is not reachable in the network via Wifi or Ethernet. Pushing the reset button didn't help either.

The Inverter card is still accessible through VE Connect.

Any chance to force an upgrade from an attached USB drive? How can I recover from this state where the GX is "broken"?

Multiplus-IIfirmware update
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3 Answers
nickdb avatar image
nickdb answered ·

As Matt said, that was a bad idea. With dependencies between the GX and the Multi leaping that far back was unwise.

A reflash may well resolve it for you.


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xzv avatar image xzv commented ·

Now I know that :)

How do I reflash it? Providing the GX with the venus-data.tgz file as Matthias suggested didn't change the situation.

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Alex Pescaru avatar image
Alex Pescaru answered ·

Hi @XZv

For recover: https://community.victronenergy.com/questions/204255/cerbo-gx-bricked-how-to-recover.html

I've also written to you in the other thread with CAN dropped messages what to do.

Alex

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xzv avatar image xzv commented ·
Will the flashing also work with an USB drive, as the MP II GX doesn't have a SD card slot?


Once I've unbricked the device I will continue investigating on that CAN issue :) Thanks!

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Matthias Lange - DE avatar image
Matthias Lange - DE answered ·

2.20 is a huge step, it's over 5 years old!
Why did you do such a big jump?

You could try a factory reset:
https://www.victronenergy.com/media/pg/CCGX/en/reset-to-factory-defaults-procedure.html

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xzv avatar image xzv commented ·
Thanks for the hint. The .tgz file didn't seem to help, I see no display content and it's not creating its Wifi access point.
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