Dear Nordic.
I want to connect multi devices(phones) to nrf51822 DK Board through BLE simultaneously
is it possible? please check image(concept)

Dear Nordic.
I want to connect multi devices(phones) to nrf51822 DK Board through BLE simultaneously
is it possible? please check image(concept)

Yes - make the 51822 a central, you can have up to 6 connected peripherals.
I don't. Look at all the many central examples in the SDK.
I don't. Look at all the many central examples in the SDK.