Bluez Maintainers Here is a fix for attribute writes not working in src/shared/gatt-db.c https://github.com/tramsay/bluez-tramsay/commit/246bc960629dff34e744c728f048e9f50f1a005d shared/gatt-db: Prepare Write req error BT_ATT_ERROR_UNLIKELY Fixes Prepare Write req error: BT_ATT_ERROR_UNLIKELY ATT: Error (0x01) Error: Unlikely error (14) Prepare Write req (0x16) on handle 0x0069 The prep_write_complete_cb was not getting called The attrib->write_func code block should not be called when len is 0 Internal Use - Confidential