MFI ios app before the signing the program

I am working on the ios swiftui app, and I need to communicate with an external embedded device using a USB cable and Bluetooth, I read some articles about MFI, and I figured out that I need to enroll in the MFI program.

My questions:

  1. Am I need to apply the MFI and sign the NDA before starting the development and testing the communication?

  2. Is there any tutorial, demo app illustrating the process of using the EA framework using the app?

MFI ios app before the signing the program
 
 
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