January 2015 - Bluetooth-dev

Unable To Find Connected Bluetooth Devices In My App
by jose2q＠gmail.com 23 Jan '15

23 Jan '15

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didDiscoverPeripheral
by Ardıç Sobutay 22 Jan '15

22 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Hank Li 22 Jan '15

22 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Anton Lam 22 Jan '15

22 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Anton Lam 21 Jan '15

21 Jan '15

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Issue Porting CoreBluetooth Application from iOS to OS X
by Mark Gill 20 Jan '15

20 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Christopher Cotton 19 Jan '15

19 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by David Chu 19 Jan '15

19 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Hank Li 19 Jan '15

19 Jan '15

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Re: How to get the updated advertisementData (kCBAdvDataManufacturerData) value?
by Christopher Cotton 17 Jan '15

17 Jan '15

I think one issue with that code, is that you aren't keeping a reference the peripheral. Here is a sample file that works, I tested it on our device. We are not connecting to the device, just scanning. Our advertisement data change when you press a button to let the app know which device was just pressed. https://gist.github.com/christophercotton/0993c9702b416dcee242 import UIKit import CoreBluetooth class ViewController: UIViewController, CBCentralManagerDelegate, CBPeripheralDelegate { var centralManager:CBCentralManager! var queue:dispatch_queue_t! var datas = [String : String]() var peripherals = [CBPeripheral]() override func viewDidLoad() { super.viewDidLoad() // Do any additional setup after loading the view, typically from a nib. queue = dispatch_queue_create("MyBLE", DISPATCH_QUEUE_SERIAL) centralManager = CBCentralManager(delegate: self, queue: queue); } func centralManager(central: CBCentralManager!, didDiscoverPeripheral peripheral: CBPeripheral!, advertisementData: [NSObject : AnyObject]!, RSSI: NSNumber!) { if (!contains(peripherals, peripheral)) { peripherals.append(peripheral) } let key = peripheral.identifier.UUIDString let data = advertisementData.description if let previous = datas[key] { if (previous != data) { println("Different \(peripheral.name): \(data)") } } else { println("\(peripheral.name): \(data)"); datas[key] = data } } func centralManagerDidUpdateState(central: CBCentralManager!) { println("centralManagerDidUpdateState"); if (central.state == .PoweredOn ) { println("Scanning") centralManager.scanForPeripheralsWithServices(nil, options:[CBCentralManagerScanOptionAllowDuplicatesKey:true]); } } } On Fri, Jan 16, 2015 at 1:48 PM, Hank Li <hank.h.li(a)gmail.com> wrote: > Here is my testing code to get the advertisement data, the repeat scan does > not get the updated advertisement data. > > import UIKit > import CoreBluetooth > > class ViewController: UIViewController, CBCentralManagerDelegate, > CBPeripheralDelegate { > var centralManager:CBCentralManager! > override func viewDidLoad() { > super.viewDidLoad() > // Do any additional setup after loading the view, typically from a > nib. > centralManager = CBCentralManager(delegate: self, queue: nil); > } > override func viewWillAppear(animated: Bool) { > NSTimer.scheduledTimerWithTimeInterval(5, target: self, selector: > Selector("startScan"), userInfo: nil, repeats: true); > } > override func didReceiveMemoryWarning() { > super.didReceiveMemoryWarning() > } > func startScan() { > println("startScan"); > centralManager.scanForPeripheralsWithServices(nil, options: nil); > NSTimer.scheduledTimerWithTimeInterval(3, target: self, selector: > Selector("stopScan"), userInfo: nil, repeats: false); > } > func stopScan() { > println("stopScan"); > centralManager.stopScan(); > } > func centralManager(central: CBCentralManager!, didDiscoverPeripheral > peripheral: CBPeripheral!, advertisementData: [NSObject : AnyObject]!, RSSI: > NSNumber!) { > println("\(peripheral.name): \(advertisementData)"); > } > func centralManagerDidUpdateState(central: CBCentralManager!) { > println("centralManagerDidUpdateState"); > } > } > > > > > Thanks, > Hank Li > > > > On Fri, Jan 16, 2015 at 10:46 AM, Hank Li <hank.h.li(a)gmail.com> wrote: >> >> Hi, Chris: >> >> can you email me your test app? I'd like to test it on my phone. >> >> >> Thanks, >> Hank Li >> >> >> >> On Fri, Jan 16, 2015 at 7:32 AM, Christopher Cotton >> <christopher.cotton(a)gmail.com> wrote: >>> >>> I'll have to write a short simple app to demonstrate. But, we change >>> our manufacturer data and haven't had any issue with caching. The >>> change shows up almost immediately. We don't have to connect to it >>> either. >>> >>> Which part of the data are you changing? >>> >>> >>> >>> On Fri, Jan 16, 2015 at 9:20 AM, Zach Dennis <zach.dennis(a)gmail.com> >>> wrote: >>> > iOS caching will be problematic for purely advertisement data changes. >>> > We >>> > have seen related issues as well where it will cache advertisement data >>> > based on the advertiser's address in the advertisement. We have a >>> > switch >>> > that causes a BLE device to act as different devices when toggled, but >>> > iOS >>> > caching causes an issue. >>> > >>> > Our resolution so far is to have the user toggle wifi on and off which >>> > seems >>> > to force the iOS BLE cache to be cleared. >>> > >>> > One thing to try if you own the firmware code on the BLE device is to >>> > change >>> > the advertiser address whenever you change advertising data, then iOS >>> > will >>> > think it sees a new device. But, that may defeat whatever it is you're >>> > trying to do. I'm assuming you're trying to avoid making the device >>> > connectable. >>> > >>> > Zach >>> > >>> > On Fri, Jan 16, 2015 at 6:09 AM, David Chu <storywithoutend(a)gmail.com> >>> > wrote: >>> >> >>> >> Hey Hank, >>> >> >>> >> I believe this is the problem. >>> >> >>> >> CoreBluetooth only discovers a device once and then caches the data to >>> >> save energy. In order to keep getting the updated data you would need >>> >> to do >>> >> one of two things. >>> >> >>> >> - Connect to the device and then ask for an update of the advertising >>> >> data. >>> >> It seems this is what you are avoiding. >>> >> >>> >> - Stop stop and restart your scan. (perhaps on a time delay? I have >>> >> never >>> >> stopped and restarted a scan right after each other. But I can confirm >>> >> that >>> >> restarting the scan will make the device discoverable again). >>> >> >>> >> Dave >>> >> >>> >> >>> >> On Jan 16, 2015, at 10:52 AM, Hank Li <hank.h.li(a)gmail.com> wrote: >>> >> >>> >> The peripheral is saved. the issue is that when the advertisement data >>> >> is >>> >> changed on the device, the ios app could not get the updated value. It >>> >> seems >>> >> the ios cached the advertisementdata. >>> >> >>> >> >>> >> Thanks, >>> >> Hank Li >>> >> >>> >> >>> >> >>> >> On Thu, Jan 15, 2015 at 5:05 PM, Christopher Cotton >>> >> <me(a)christophercotton.com> wrote: >>> >>> >>> >>> We use changing advertisement data just fine in our iOS app. Are you >>> >>> keeping a reference to the peripheral that is given to you? you >>> >>> should >>> >>> get a ton of logs. You need to keep a reference otherwise it discards >>> >>> that peripheral as per the docs in the header: >>> >>> >>> >>> >>> >>> * @discussion This method is invoked while >>> >>> scanning, upon the discovery of <i>peripheral</i> by <i>central</i>. >>> >>> A >>> >>> discovered peripheral must >>> >>> >>> >>> * be retained in order to use it; >>> >>> otherwise, it is assumed to not be of interest and will be cleaned up >>> >>> by the central manager. >>> >>> >>> >>> >>> >>> >>> >>> >>> >>> On Thu, Jan 15, 2015 at 6:33 PM, Hank Li <hank.h.li(a)gmail.com> wrote: >>> >>> > For my IOS app (on ios8), once it get the advertisementData, it >>> >>> > will >>> >>> > stay >>> >>> > the same, even the data has been changed on the BLE device. How can >>> >>> > I >>> >>> > get >>> >>> > the updated advertisementData in my ios app? >>> >>> > >>> >>> > Here is the code, the startScan is called every 5 seconds. >>> >>> > >>> >>> > func startScan() { >>> >>> > let opts = [CBCentralManagerScanOptionAllowDuplicatesKey:true]; >>> >>> > centralManager.scanForPeripheralsWithServices(nil, options:opts); >>> >>> > } >>> >>> > >>> >>> > func centralManager(central: CBCentralManager!, >>> >>> > didDiscoverPeripheral >>> >>> > peripheral: CBPeripheral!, advertisementData: [NSObject : >>> >>> > AnyObject]!, >>> >>> > RSSI: >>> >>> > NSNumber!) { >>> >>> > println("\(advertisementData)"); >>> >>> > } >>> >>> > >>> >>> > Here is the output, >>> >>> > [kCBAdvDataLocalName: MyDevice001, kCBAdvDataIsConnectable: 1, >>> >>> > kCBAdvDataManufacturerData: <11e467f7 7ec2ed>] >>> >>> > >>> >>> > the output will never change. how to get the updated >>> >>> > advertisementData >>> >>> > value? >>> >>> > >>> >>> > Thanks, >>> >>> > Hank Li >>> >>> > >>> >>> > >>> >>> > >>> >>> > _______________________________________________ >>> >>> > Do not post admin requests to the list. They will be ignored. >>> >>> > Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >>> >>> > Help/Unsubscribe/Update your Subscription: >>> >>> > >>> >>> > >>> >>> > https://lists.apple.com/mailman/options/bluetooth-dev/christopher.cotton%40… >>> >>> > >>> >>> > This email sent to christopher.cotton(a)gmail.com >>> >>> >>> >>> >>> >>> >>> >>> -- >>> >>> Christopher >>> >> >>> >> >>> >> _______________________________________________ >>> >> Do not post admin requests to the list. They will be ignored. >>> >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >>> >> Help/Unsubscribe/Update your Subscription: >>> >> >>> >> >>> >> https://lists.apple.com/mailman/options/bluetooth-dev/storywithoutend%40gma… >>> >> >>> >> This email sent to storywithoutend(a)gmail.com >>> >> >>> >> >>> >> >>> >> _______________________________________________ >>> >> Do not post admin requests to the list. They will be ignored. >>> >> Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) >>> >> Help/Unsubscribe/Update your Subscription: >>> >> >>> >> >>> >> https://lists.apple.com/mailman/options/bluetooth-dev/zach.dennis%40gmail.c… >>> >> >>> >> This email sent to zach.dennis(a)gmail.com >>> > >>> > >>> > >>> > >>> > -- >>> > @zachdennis >>> > http://www.continuousthinking.com >>> > http://www.mutuallyhuman.com >>> >>> >>> >>> -- >>> Christopher >> >> > -- Christopher _______________________________________________ Do not post admin requests to the list. They will be ignored. Bluetooth-dev mailing list (Bluetooth-dev(a)lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/bluetooth-dev/site_archiver%40lists… This email sent to site_archiver(a)lists.apple.com

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