Why can't I use an adapter to connect a USB-C Echo Meter Touch to my Lightning iOS device?

Apple requires any accessories for iOS devices with Lightning ports to undergo "Made for iPhone" (MFi) certification, but they do not issue this certificate to Micro-USB or USB-C accessories. Apple's current policies make it impossible to use USB-C-equipped EMT modules with Lightning-equipped iOS devices, even with an adapter that fits both connections.

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