Hi, what I did is wrote below: 1/ I program the S120 softdevice to the nRF51822 board, using nRFgo studio software(the softdevice size is set to 80KB). 2/ I complied the code of "ble_app_hrs_c" by Kile, and download the code to the board.
problem: the scanning LED 0 didn't lit, which mean that the board didn't running rightly.
s120 softdevice version: s120_nrf51822_1.0.0-3.alpha the path of the example: C:\Nordic Semiconductor\nRF51 SDK_v5.2.0.39364\Nordic\nrf51822\Board\nrf6310\s120\experimental\ble_app_hrs_c