No BLE device founfd

CHip:52840

Flash Assign:softdevice S140 0x00000000-0x0026000   Ram 0x20000000-0x20003000

                         SDK  v15.3    0x0026000-0x00800000        Ram 0x20003000-0x40000000

example:  ble_app_hids_mouse

Compile OK

But Can not  find BLE device  in app.how?