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it depends.iOS 13 / 13.1 introduces support for GATT via BR/EDR and adds a new API to Core Bluetooth where you can register for connection / disconnection events of Classic devices, based on the GATT service UUIDs (see WWDC 2019 Session #901 - "What's New in Core Bluetooth")So if the Classic device supports GATT via BR/EDR and the services have been discovered upfront, then yes, you can query these devices without the need to do a BLE scan. Essentially, this is a subset of the paired devices. Not sure if this is what you need.If not, you'll need the External Accessory framework and MFi support on the Bluetooth accessory.