The Generic Attribute service (0x1801) has Service Changed characteristic (0x2A05). They are added automatically by Aci_Gatt_Init. Does BlueNRG-MS stack send indications with this characteristc when services and characteristics are being added or removed? Or I need to send indications manually? Central devices, e.g. mobiles phones, cache services and they need to be notified by Service Changed characteristic so they can rescan peripheral device and update their cache.