Hello,everyone,I encountered a confusing problem. My device is nrf51822. I want to test whether the communication between two equipments is normal . So I choose one as central and the other one as peripheral. Meanwhile I download the sample program called "ble_app_hrs_rscs_relay_s130_pca10028" into the central. However it's sorry to find that the central can't scan to the peripheral which can scanned by my phone. I test the program by flashing led lights and I discover that the period code called "on_ble_central_evt" can't be executed. Hope that you can help me to solve the problem.