how to parir between board to board?

hi devzone

I have no idea to pair between one nrf52 dk board and other nrf52dk board, not using nrf connect app, without wiring board to board.

I understand if i do pair them, i set up that one is as periphral, the other is as central.

but i don't know how I pair them specifically


for example, if i press button 1 in one nRF52-dk board, LED1 on the other nRF52-dk board is turned on.
Likely, if I push button 2, 3, 4, LED2, LED3, LED4 on the other nRF52-dk board is turned on.


How can I do that? I don't know how to write code. Would anyone give me a little hint or know-how?
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