typedef void (*notify_callback)(int conn_id, btgatt_notify_params_t *p_data);
/** Registers service changed callback operation */
-typedef void (*service_changed_callback)(bt_bdaddr_t *bd_addr, int change_type, uint8_t *uuid, int conn_id);
+typedef void (*service_changed_callback)(bt_bdaddr_t *bd_addr, int change_type, uint8_t *uuid, int conn_id, int inst_id);
/** Reports result of a GATT read operation */
typedef void (*read_characteristic_callback)(int conn_id, int status,