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By jj8431
#74974 Hi,
I'm new to ESP8266 and just start learning it.
I found there are some changes in the document 2A-ESP8266-SDK__Getting_Started_Guide latest version 3.0.
In my previous version 2.8, there are some description about bin file master_device_key.bin, but in 3.0 these words are removed. To my understanding the file is used to link with espressif cloud IoT server. Does it mean it's not needed any more? (see screen captures of different version below)
Screenshot from 2018-03-29 20-32-56.png

above is of V2.8 file.
Screenshot from 2018-03-29 20-33-43.png

Above is of V3.0

There is another question about the SDK. In both V2.8 and V3.0, they mentioned about modifying SDK file according to different flash size before compile (Chapter 5.1), but I couldn't find these lines in any file in the SDK, anybody encountered the same problem? is this an mistake in the document?
Screenshot of the chapter 5.1
Screenshot from 2018-03-29 20-41-48.png


Thanks for any comments!
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