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V5 firmware upgrade from older than 2017-02-15

When upgrading from a firmware older than 2017-02-15. The first firmware upgrade typically fails and the embosser gives an error message "failed to upgrade firmware". 
Now re-start the embosser and make a firmware upgrade again. This time it typically succeeds.

In case the firmware upgrade don't work, contact support@indexbraille.com and the support team will send you a new SD card to re-booth the V5 printer.