Hi. I will make clock. I use RTC2 + Softdevice. (PCA10040 , NRF52832 , s132_nrf52_2.0.0_softdevice.hex ) Base Source code = nRF5_SDK_11.0.0_89a8197\examples\ble_peripheral\ble_app_uart const nrf_drv_rtc_t rtc = NRF_DRV_RTC_INSTANCE(2); static…