I got the bluetooth low energy Heart Rate Monitor working using corebluetooth.framework on IOS 5.0. But some times I get the following problems.
1) Sometimes when I start the scan (with scanForPeripheralsWithServices method), It can not discover any BLE(Bluetooth Low Energy) devices until I turn off and turn on the Iphone Bluetooth manually. Occasionaly I had to reboot the phone also if the bluetooth turn off and turn on did not work.
2) Sometimes When I try to connect to the device for which I have stored the UUID previously, I was able to connect to the device, i.e, didConnectPeripheral delegate method was called but It never discovers any services even though I call [peripheral discoverServices:nil] i.e, I am not getting any data from the device in the delegate method didDiscoverServices. For this also I had to reboot the phone.
Try checking the archives here:
http://lists.apple.com/archives/bluetooth-dev
and if you don’t find it, send the question there. Many Apple Bluetooth engineers answer questions on that mailing list.