title: didDiscoverPeripheral not called
body: <p>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.</p>
  
  <p>In <code>centralManagerDidUpdateState</code> I'm scanning for peripherals:</p>
  
  <pre><code>CBUUID *cbuuidService = [CBUUID UUIDWithString:@"0x1101"];
  NSArray *service = @[ cbuuidService ];
  NSDictionary *options = @{ CBCentralManagerScanOptionAllowDuplicatesKey : @YES };
  [central scanForPeripheralsWithServices:service options:options];
  </code></pre>
  
  <p>but <code>didDiscoverPeripheral</code> never called.</p>
  
  <p>I tried to scan without services and it has the same effect.</p>
  
  <p>What am I doing wrong? What <code>cbuuid</code> do I need and where can I find it? Thank for any help.</p>