9.4.2. Install a specific firmware version from SD/USB
There may be reasons why it is necessary to manually download and install a specific firmware version (e.g. an older firmware
version that is not stored under "Stored backup firmware" on the GX device). This chapter explains how to do that.
1. Old Venus OS firmware versions are available for download here: https://updates.victronenergy.com/feeds/venus/release/
images/
2. For Color Control GX use the ccgx folder.
3. Download the .swu file of the version required.
4. Store the .swu file in the root folder of a USB-stick or MicroSD-card.
5. Insert the USB-stick or MicroSD-card into your GX device.
6. Note that you will see a warning “Attached storage contains a firmware image, not using for data logging.”. The warning can
safely be ignored.
7. Navigate to Settings → Firmware → Install firmware from SD/USB.
8. It should show the specific firmware version under 'Firmware found'. Click on it to install.
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.
Color Control GX Manual
Page 53 Firmware updates
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