How to avoid the Not expected connect?

[ligang]

[ligang]

Now, I can send data to Nordic board through ble, and I can get the data from it. But , I can not sure that when I disconnect the board, then someone connect the board.

If I use the board to mark my box. When Someone connect the board, he can say that the box is his box.

So, we need safe connect.

[Alex]

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