Hi, Thanks irahul for pointing out to the missing store_read_cb callback. I work with the Dave on the same project and allocating callbacks to ble_hs_cfg from ble_store_config.c got us further. ble_hs_cfg.reset_cb = bleprph_on_reset; ble_hs_cfg.sync_cb = ble_app_on_sync; ble_hs_cfg.store_status_cb =...