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How to do if there is a problem during upgrading AVR firmware?
If FS28 does not respond for 3 minutes during upgrading the AVR firmware, then it may hang and
the upgrade process is fail. In this case, you need to re-enable program upgrade by following these
procedures below.
Step 1:
Short press the reset button to turn off FS28.
Step 2:
Holding the DOWN button and the EXIT button at the same time to re-enable program
upgrade.
Step 2:
Close the port and quit the application in PC side.
