No, CoreBluetooth for Bluetooth Low Energy. Accessory external infrastructure can be used to connect classic Bluetooth. But in order to be able to open the serial channel from the iPhone, you need peripherals that correspond to the Made For iPhone (MFi) program, and you need to be an MFi member to be able to buy it. Have a look at this question for more information: What is needed to use the Apple Accessory Protocol?
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