Finding generic Bluetooth devices within reach

Question

We are using the iOS private framework BluetoothManager for a simple experiment -- to find discoverable generic (non-iOS) BT devices within reach. Now, only the fol

Answer 1

Rather than using the private BluetoothManager framework, why not use the publicly available Game Kit framework which exposes several methods to support detecting & connecting two devices via Bluetooth and exchanging data between them (and it's not restricted to just being used in games despite its name)

There's a pretty comprehensive tutorial here.

You can either use the built-in GKPeerPickerController, or manage it yourself with the following

// create a session on each of your devices
GKSession *session = [[GKSession alloc] initWithSessionID:@"uniqueSessionID" displayName:@"deviceDisplayName" sessionMode:GKSessionModePeer
// set the delegate on the session
session.delegate = self;

make sure to use the same session id across all devices, but make the name unique to the device

then implement the following delegate method

- (void)session:(GKSession *)session peer:(NSString *)peerID didChangeState:(GKPeerConnectionState)state

and when new peers advertise themselves with the same session id, this will be called and their state should be

GKPeerStateAvailable