ESP NOW - Intro (1)

 ESP NOW is a simple peer-to-peer

    wireless communication method.

It can be set up for one-to-one,

   one-to-many, and many-to-many comm.

Some people use it as a remote control solution.

How to use?

Summary of steps:

    1) init esp now

    2) add peer(s), statistically!

    2) register callbacks

    3) do send message

        // payload is 250 bytes max, C struct

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