Application background Hid nrf51822 mode hid nrf51822 mode hid nrf51822 mode hid nrf51822 mode hid nrf51822 mode hid nrf51822 mode hid nrf51822 mode Key Technology   nrf51822; the complete demo of the Bluetooth desktop keyboard.  nrf51822; the complete demo of the Bluetooth desktop keyboard.  nrf51822; the complete demo of the Bluetooth desktop keyboard.