File list (Check if you may need any files):
s110_nrf51822_5.2.1_softdevice.hex
....................API\doc
.......................\...\ble_api.dox
.......................\include
.......................\.......\ble.h
.......................\.......\ble_err.h
.......................\.......\ble_gap.h
.......................\.......\ble_gatt.h
.......................\.......\ble_gattc.h
.......................\.......\ble_gatts.h
.......................\.......\ble_hci.h
.......................\.......\ble_l2cap.h
.......................\.......\ble_ranges.h
.......................\.......\ble_types.h
.......................\.......\nrf_error.h
.......................\.......\nrf_error_sdm.h
.......................\.......\nrf_error_soc.h
.......................\.......\nrf_sdm.h
.......................\.......\nrf_soc.h
.......................\.......\nrf_svc.h
.......................\.......\softdevice_assert.h
s110_nrf51822_5.2.1_migration-document.pdf
s110_nrf51822_5.2.1_readme.txt
s110_nrf51822_5.2.1_releasenotes.pdf