How to use bluetooth classic instead of le

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Joels there is a very clear way to use Bluetooth classic on iOS. It is with the External Accessory framework (it also includes direct hardware connections in addition to Bluetooth classic however).

You need to add the ExternalAccessory.framework and specify “App communicates with an accessory” in the required background modes inside your plist to get started. It should be noted however that with Bluetooth classic, the user must add your Bluetooth device from the System Bluetooth settings. It is only with Bluetooth LE that we are able to add devices from the app side.

Check out the docs on the External Accessory Framework

In response to your question regarding the MFi program, this should clarify:

I want to develop an iOS app that communicates with an MFi accessory. Do I need to join the MFi Program?
No. iOS app developers do not need to join the MFi Program. Everything app developers need is in the External Accessory Framework,
which is provided in the iOS SDK. To access the iOS SDK, please join
the iOS Developer Program: https://developer.apple.com/programs/ios/.

If you’d like to learn more, consult the MFi FAQ

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