Every embedded device needs device firmware update (DFU) capability. Why?
Inevitably, you are bound to ship bugs. You can’t anticipate every user’s input, and you can’t anticipate all the ways in which end users will use your device. But that’s only half of it; devices are now increasingly complex. Even the best QA teams won’t be able to catch every issue. Consider NASA, which is no stranger to needed firmware updates for the Mars Rover, whether due to an unintended crash bug or a crash after a software update. No one disputes NASA’s extremely rigorous process and well-documented testing regimens but, even NASA relies on firmware updates.
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