Anyone can explain why NavIO+ need MB85RC04 FRAM chip ? what type of data storage in this chip?

It was mainly intended for developers, it is not used by APM code. FRAM allows you to store some data in your Navio+ and rewrite it as many times as you wish. It is very robust.

Got it, thanks Igor .
Navio+ will be an open hardware ?

Probably in the future.

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