didDiscoverPeripheral not called

问题

I need to send ASCII-codes via bluetooth to the third-party device. Hope it's possible to do with spp. I could be wrong in terminology. I don't know enough this programming area.

In centralManagerDidUpdateState I'm scanning for peripherals:

CBUUID *cbuuidService = [CBUUID UUIDWithString:@"0x1101"];
NSArray *service = @[ cbuuidService ];
NSDictionary *options = @{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES };
[central scanForPeripheralsWithServices:service options:options];

but didDiscoverPeripheral never called.

I tried to scan without services and it has the same effect.

What am I doing wrong? What cbuuid do I need and where can I find it? Thank for any help.

回答1:

You need to have one device act as a central (which you do) and one as a peripheral device. So assuming that you use your MB Air as the central, you need to start a CBPeripheralManager on your iPad and have it publish and advertise a service. Then you should be able to discover it on your MB.

I guess the easiest way would be to get a working peripheral (e.g. a heart rate belt), so you can familiarize yourself with the usage of CBCentralManager. Then you could start implementing your own peripheral.

PS: I am not sure it is correct to put 0x at the beginning of the identifier.

回答2:

Believe CoreBluetooth is very hard to use.

Instead of working with that messy framework use LGBluetooth (It woks over CoreBluetooth).

    [[LGCentralManager sharedInstance] scanForPeripheralsByInterval:10
                                                         completion:^(NSArray *peripherals)
     {
     }];

here is a example of scanning by interval.

Check it out https://github.com/l0gg3r/LGBluetooth

来源：https://stackoverflow.com/questions/21606577/diddiscoverperipheral-not-called