hi everyone. im new to xcode and wondering if anyone has any idea for what to do when your initial view controller keeps showing a black screen. ive done the following ensured Main storyboard file base name in info.pl is set to my storyboard. also under application scene manifest --> scene configurations --> application session role --> item 0 i have storyboard name as my storyboard and delegate class name as my SceneDelegate but I keep receiving this error 2024-02-13 22:42:47.452242-0500 PROJECT-NAME[11302:838011] [SceneConfiguration] Info.plist configuration "(no name)" for UIWindowSceneSessionRoleApplication contained UISceneDelegateClassName key, but could not load class with name "SceneDelegate". 2024-02-13 22:42:47.452641-0500 PROJECT-NAME[11302:838011] [SceneConfiguration] Info.plist configuration "(no name)" for UIWindowSceneSessionRoleApplication contained UISceneDelegateClassName key, but could not load class with name "SceneDelegate". 2024-02-13 22:42:47.456532-0500 PROJECT-NAME[11302:838011] [WindowScene] There is no scene delegate set. A scene delegate class must be specified to use a main storyboard file. the initial view controller box is checked for the correct controller (HomePageController) ive added print statements to my viewDidLoad() in my HomePageController (i guess one weird thing is that i cant set 'main interface' to my main storyboard in the deployment info section) im really not sure what else to do, and any help would be really appreciated. im a beginner so all of this is a bit difficult. this is my info.pl file: https://drive.google.com/file/d/1W-KOH3BjqgfJf10n9LM5bRTYHXQYM9ER/view?usp=sharing

Hello, We are working with Nearby Interaction (UWB) technology to provide high-accurate location use cases to our customers. According to Apple's documentation, in order to enable background sessions starting iOS16, the two devices need to be paired. The accessory needs to implement Nearby service and mandated encrypted characteristic. https://developer.apple.com/documentation/nearbyinteraction/ninearbyaccessoryconfiguration So far we tested this with "PIN-based" secure pairing and everything works fine. Can you confirm if "Just works" PIN-less pairing is expected to work as well here? The documentation is not clear on this respect. We would basically indicate IoNone local capabitilities for the accessory gap parameters if this is expected to work. Thanks in advance! Regards.

Currently working on an emergency app paired with a BLE device, and the desired use case is: When the device is triggered, it sends your location to your emergency contacts an API we've built. This flow works while the app is open, but we need things to obviously work while in background (while the phone is sleeping as well, of course, for emergency contexts) From what I've researched and understood, background fetches don't really work, because the intervals are a maximum of about 15 minutes, and iOS will make them less frequent based on app usage, and that window in an emergency situation isn't good enough. Having read around, I've bumped into a couple resources that suggest background bluetooth processing is possible, if I listen for a particular service being advertised, but I haven't been able to make things work so far. I wanted some help on this.

We do have an app where we try to connect via BLE to our own hardware. To trigger the pairing process we attempt a read operation on an encrypted characteristic. If the devices are note paired/bonded yet we do receive the expected CBATTErrorInsufficientEncryption Error and the native alert opens to enter the PIN. If the native pairing alert is now canceled 2-3 times the native alert will not be shown for any attempt afterwards unless I wait around 3 minutes. Is there a certain timeout for BLE devices when the system shows the pairing alert again in case it failed multiple times? I didn't find anything in that regard in the documentation.

I have an app to communicate with a peripheral via L2CAP channel. Even I already enabled "Uses Bluetooth LE accessories" in "Background Mode", it still stop working when I lock the screen. Did some search and found these two posts: CBL2CAPChannel not responsive while app is backgrounded iOS Swift CoreBluetooth CBL2CAPChannel L2CAP Channel Oriented Connection Cannot Reconnect After Close From Central I am wondering if there are any solutions or work around about this. Based on the use case, I prefer to use L2CAP to transfer large data between two devices, so won't consider GATT.

Hi Team, 

I am developing a sample authPluggin which should connect to a mobile app via bluetooth connection, 
So here are the scenario

 Authplugin with Bluetooth connection shoould work on lockscreen+login 

I have created mechanism- prepared:privillaged, main, clean:Privilaged Calling corebluetoothmanager initiation at the time of prepared:privilaged mechanism I have to add my auth plugin’s mechanism before loginwindow:success mechanism

 But I always gets unauthorized = 3, from power state of bluetooth

 Note: With App, bluetooth connection is working fine, Its giving error with authPlugin How to achieve my ultimate goal, is this the right way?

We are implementing indoor positioning and proximity sensing in our iOS app using iBeacons. We have placed multiple beacons to detect the proximity of one point of interest(POI). We are using the startRangingBeacons method in the CLLocationManager class and implementing corresponding delegates to receive the ranging information. With all required foreground and background permissions granted, when a user walks from one POI to another, beacon ranging is working as expected and we are continuously receiving the sightings in the app. We have observed that, if user stops walking for a few minutes at a POI and then device automatically pauses the scan. Hence, we will not receive any beacon signals. When there is a movement, it performs beacon ranging again for a minute or so, then stops again for longer time even when user is walking. The interval between the pausing and resuming the service is not a constant. We have also observed that sometimes it takes more than 15 minutes to resume the service once the system pauses the ranging automatically. Is it an expected behavior? How long does it usually take for beacon ranging services to resume after the user starts moving? Is there any way we can reduce this delay between the pause and resume of ranging beacons? Appreciate your support

My watch APP needs to keep Bluetooth connected with peripherals whether it is in the foreground or background, but the results of my test show that the connection in the background is very unstable, sometimes you can keep the Bluetooth on for a day, but sometimes it will be disconnected 50 times a day, and every time it is disconnected, I will immediately initiate a reconnection, it is certain that there is no problem with the peripheral Bluetooth, because I have another iOS device that has been stably connected to the peripheral, I want to know what causes this instability, and if there is any solution, if someone can provide relevant advice, I will be very grateful

Hi, I am developing a service that reads data from wearable devices. It should launch the scheduler every 15 min, but however sometimes there is a delay of 1 - 5 minutes, there are days that the scheduler does not run between 23:00 to 7 am, I am using BGAppRefreshTaskRequest. Can someone give me a hand?

Hey, I've been trying to find information but haven't had any luck so far. I own two third party bluetooth trackers (not AirTags), which I've linked to Find My. Recently, I misplaced an item that had one of these trackers attached. Surprisingly, even though I was quite far away, I was still receiving updates on its location a couple hours after I lost it. I'm curious to know, does connecting a third party bluetooth tracker to Find My function in the same way as AirTags? Are there any specific documents or resources where I can learn more about this? I'm really interested in understanding how it works.

Hi, I am inquiring in regard to how to handle data from a bluetooth device. The device would send data in JSON format to a Mac via bluetooth, and I would need to constantly refresh or fetch data from the device in real time. How would I go about this? Any help would be greatly appreciated. Thank you.

Hello everyone, Like so many others, I am a very newbie App developer. To my own detriment, I acknowledge I am trying to shortcut things a bit by using and modifying other pieces of code. Always easier to modify something that is already working, rather than staring at a blank screen not knowing how to begin. So this leads me to this problem I am having. This is a Bluetooth application. And the Bluetooth runs just fine in both of my views. However, when the Bluetooth is linked and active, and I am receiving data, a Timer will not run. As soon as I stop the Bluetooth source (using an Arduino nano), the time begins to count again. There are no errors flagged in Xcode, just does not work properly. I was hoping someone could take a look and find the issue, and let me know how to fix it. Hopefully it is something easy, but without any errors being thrown, hard to know what to look for. Thanks... So this is my Bluetooth Code: import Foundation import CoreBluetooth enum ConnectionStatus: String { case connected case disconnected case scanning case connecting case error } let BarrelBaristaService: CBUUID = CBUUID(string: "4FAFC201-1FB5-459E-8FCC-C5C9C331914B") //Temperature F let TemperatureCharacteristic: CBUUID = CBUUID(string: "5D54D470-8B08-4368-9E8F-03191A0314A5") //Humidity % let HumidityCharacteristic: CBUUID = CBUUID(string: "B2F5E988-C50F-4200-A1D9-5884F9417DEF") //Weight % let WeightCharacteristic: CBUUID = CBUUID(string: "BEB5483E-36E1-4688-B7F5-EA07361B26A8") class BluetoothService: NSObject, ObservableObject { private var centralManager: CBCentralManager! var BarrelBarristaPeripheral: CBPeripheral? @Published var peripheralStatus: ConnectionStatus = .disconnected @Published var TempValue: Float = 0 @Published var HumidValue: Float = 0 @Published var WeightValue: Float = 0 @Published var Connected: Bool = false override init() { super.init() centralManager = CBCentralManager(delegate: self, queue: nil) } func scanForPeripherals() { peripheralStatus = .scanning centralManager.scanForPeripherals(withServices: nil) } } extension BluetoothService: CBCentralManagerDelegate { func centralManagerDidUpdateState(_ central: CBCentralManager) { if central.state == .poweredOn { print("CB Powered On") scanForPeripherals() } } func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) { if peripheral.name == "Barrel Barista" { print("Discovered \(peripheral.name ?? "no name")") BarrelBarristaPeripheral = peripheral centralManager.connect(BarrelBarristaPeripheral!) peripheralStatus = .connecting } } func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) { peripheralStatus = .connected Connected = true peripheral.delegate = self peripheral.discoverServices([BarrelBaristaService]) centralManager.stopScan() } func centralManager(_ central: CBCentralManager, didDisconnectPeripheral peripheral: CBPeripheral, error: Error?) { peripheralStatus = .disconnected Connected = false } func centralManager(_ central: CBCentralManager, didFailToConnect peripheral: CBPeripheral, error: Error?) { peripheralStatus = .error print(error?.localizedDescription ?? "no error") } } extension BluetoothService: CBPeripheralDelegate { func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) { for service in peripheral.services ?? [] { if service.uuid == BarrelBaristaService { print("found service for \(BarrelBaristaService)") peripheral.discoverCharacteristics([TemperatureCharacteristic], for: service) peripheral.discoverCharacteristics([HumidityCharacteristic], for: service) peripheral.discoverCharacteristics([WeightCharacteristic], for: service) } } } func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) { for characteristic in service.characteristics ?? [] { peripheral.setNotifyValue(true, for: characteristic) print("found characteristic, waiting on values.") } } func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) { if characteristic.uuid == TemperatureCharacteristic { guard let data = characteristic.value else { print("No data received for \(characteristic.uuid.uuidString)") return } let TempData: Float = data.withUnsafeBytes { $0.pointee } TempValue = TempData } if characteristic.uuid == HumidityCharacteristic { guard let data = characteristic.value else { print("No data received for \(characteristic.uuid.uuidString)") return } let HumidData: Float = data.withUnsafeBytes { $0.pointee } HumidValue = HumidData } if characteristic.uuid == WeightCharacteristic { guard let data = characteristic.value else { print("No data received for \(characteristic.uuid.uuidString)") return } let WeightData: Float = data.withUnsafeBytes { $0.pointee } WeightValue = WeightData } } }

Hello everyone, I am new to Swift, it is my first project and I am a PhD Electrical Engineer student. I am designing an iOS app for a device that we are designing that is capable of reading electrical brain data and sending them via BLE with a sampling frequency of 2400 Hz. I created a Bluetooth service for the Swift app that every time it receives new data, processes it to split the different channels and add the new data to the Charts data arrays. Here is the code I've designed: func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) { if characteristic.uuid == Nordic_UART_TX_CHAR_UUID { guard error == nil, let data = characteristic.value else { print("[Bluetooth] Error receiving data or no data: \(error?.localizedDescription ?? "Unknown Error")") return } DispatchQueue.global(qos: .background).async { self.processReceivedData(data) } } } func processReceivedData(_ data: Data) { var batch = [(Int, Int)]() for i in stride(from: 0, to: data.count - 4, by: 4) { let channel = Int(data[i] & 0xFF) let value = Int((Int(data[i + 3] & 0xFF) << 16) | (Int(data[i + 2] & 0xFF) << 8) | (Int(data[i + 1] & 0xFF))) - 8388608 batch.append((channel, value)) } DispatchQueue.main.async { for (channel, value) in batch { let nowTime = (Date().timeIntervalSince1970 - self.dataGraphService.startTime) let newDataPoint = DataGraphService.VoltagePerTime(time: nowTime, voltage: Double(value)/8388608, channel: "Channel \(channel - 15)") if channel == 16 { self.dataGraphService.lastX1 = nowTime self.dataGraphService.dataCh1.append(newDataPoint) } else if channel == 17 { self.dataGraphService.lastX2 = nowTime self.dataGraphService.dataCh2.append(newDataPoint) } else if channel == 18 { self.dataGraphService.lastX3 = nowTime self.dataGraphService.dataCh3.append(newDataPoint) } else if channel == 19 { self.dataGraphService.lastX4 = nowTime self.dataGraphService.dataCh4.append(newDataPoint) } } } } // DataGraphService.swift struct VoltagePerTime { var time: Double var voltage: Double var channel: String } @Published var dataCh1: [VoltagePerTime] = [] @Published var dataCh2: [VoltagePerTime] = [] @Published var dataCh3: [VoltagePerTime] = [] @Published var dataCh4: [VoltagePerTime] = [] @Published var windowSize: Double = 2.0 @Published var lastX1: Double = 0 @Published var lastX2: Double = 0 @Published var lastX3: Double = 0 @Published var lastX4: Double = 0 I also created a View that shows the real-time data from the different channels. ChartView( data: dataGraphService.dataCh1.filter { dataGraphService.getXAxisRange(for: dataGraphService.dataCh1, windowSize: dataGraphService.windowSize).contains($0.time) }, xAxisRange: dataGraphService.getXAxisRange(for: dataGraphService.dataCh1, windowSize: dataGraphService.windowSize), channel: "Channel 1", windowSize: dataGraphService.windowSize ) // ChartView.swift import SwiftUI import Charts struct ChartView: View { var data: [DataGraphService.VoltagePerTime] var xAxisRange: ClosedRange<Double> var channel: String var windowSize: Double var body: some View { RoundedRectangle(cornerRadius: 10) .fill(Color.gray.opacity(0.1)) .overlay( VStack{ Text("\(channel)") .foregroundColor(Color.gray) .font(.system(size: 16, weight: .semibold)) Chart(data, id: \.time) { item in LineMark( x: .value("Time [s]", item.time), y: .value("Voltage [V]", item.voltage) ) } .chartYAxisLabel(position: .leading) { Text("Voltage [V]") } .chartYScale(domain: [-1.6, 1.6]) .chartYAxis { AxisMarks(position: .leading, values: [-1.6, -0.8, 0, 0.8, 1.6]) AxisMarks(values: [-1.6, -1.2, -0.8, -0.4, 0, 0.4, 0.8, 1.2, 1.6]) { AxisGridLine() } } .chartXAxisLabel(position: .bottom, alignment: .center) { Text("Time [s]") } .chartXScale(domain: xAxisRange) .chartXAxis { AxisMarks(values: .automatic(desiredCount: Int(windowSize)*2)) AxisMarks(values: .automatic(desiredCount: 4*Int(windowSize)-2)) { AxisGridLine() } } .padding(5) } ) .padding(2.5) .padding([.leading, .trailing], 5) } } With these code I can receive and plot the data in real-time but after some time the CPU of the iPhone gets saturated and the app stop working. I have the guess that the code is designed in a way that the functions are called one inside the other one in a very fast speed that the CPU cannot handle. My doubt is if there is any other way to code this real-time plotting actions without make the iPhone's CPU power hungry. Thank you very much for your help!

Hello everyone, I've developed an application using ElectronJS and NodeJS, utilizing the Web Bluetooth API for connecting to and streaming data from peripherals. Initially, this was built and tested on macOS Ventura, where everything worked as expected. However, I've encountered a couple of issues post the Sonoma update. Issue 1: Slower Streaming Speed Post-Sonoma Update After updating to Sonoma, the streaming speed from peripherals significantly decreased. This is perplexing because the app continues to perform well on Ventura. To troubleshoot, I even developed a version using Rust with the btleplug library, hoping for improved Bluetooth performance. However, this did not lead to any noticeable difference; both the Electron and Rust versions perform nearly the same. Has anyone experienced similar issues or knows what might be causing this slowdown? Issue 2: GATT Operation Error Resolved, but Streaming Speed Affected On Ventura, one specific command consistently failed with a GATT operation error. Interestingly, post-Sonoma update, this command works without error, but this seems to have affected the streaming speed. The improved GATT operation seems to come at the cost of decreased streaming performance. Is there a known connection between these two aspects, or has anyone observed a similar trade-off? I'm looking for insights or suggestions to resolve these issues, particularly the streaming speed degradation post-Sonoma. The application needs to maintain consistent performance across different macOS versions, and these discrepancies are quite challenging. Thank you in advance for your help and insights! Best regards,

I have tried below code to open [Settings(App) -&amp;gt; Bluetooth Settings] but it is navigating to App permission screen instead of Bluetooth Settings. I have tried to search but didn't get any latest documentation regarding it. Is there any way to do this? guard let url = URL(string: UIApplication.openSettingsURLString) else { return } if UIApplication.shared.canOpenURL(url) { UIApplication.shared.open(url, options: [:], completionHandler: nil) }

I'm trying a Data value (1438 bytes) to write to a characteristic which exceeds the MTU size. When I issue the write request I receive .prepareQueueFull According to the documentation: "The prepare queue is full, as a result of there being too many write requests in the queue." The unfortunate thing is that on the I only call the write request once. peripheral.writeValue(data, for: characteristic, type: .withResponse) Any input and possible solution is welcome. Thank you in advance.

Hello, I had trouble with bluetooth on my MacBook Air running macOs Sonoma 14.2.1. I could not find some bluetooth devices, like my iPad for instance, so I decided to delete the plist file to "reset" bluetooth settings. Unfortunately bluetooth still behaves the same and additionally PacketLogger stopped working. It stays empty and does not show any traffic. Anybody knows what to do here?

I have used this example to create the following code: import Foundation import CoreLocation let monitorName = "BeaconMonitor" let testBeaconId = UUID(uuidString: "EDFA3FFA-D80A-4C23-9104-11B5B0B8E8F3")! @MainActor public class ObservableMonitorModel: ObservableObject { private let manager: CLLocationManager public var monitor: CLMonitor? init() { self.manager = CLLocationManager() self.manager.requestWhenInUseAuthorization() self.manager.requestAlwaysAuthorization() } func startMonitoringConditions() { Task { monitor = await CLMonitor(monitorName) await monitor!.add(getBeaconIdentityCondition(), identifier: "Beacon") for identifier in await monitor!.identifiers { guard let lastEvent = await monitor!.record(for: identifier)?.lastEvent else { continue } print(identifier, lastEvent.state) } for try await event in await monitor!.events { print("Event", event.identifier, event) } } } } func getBeaconIdentityCondition() -> CLMonitor.BeaconIdentityCondition { CLMonitor.BeaconIdentityCondition(uuid: testBeaconId) } Unfortunately, running this on my iPhone only prints "Beacon CLMonitoringState". I don't see anything from the for try await block starting with "Event". Any ideas where I've gone wrong?

I would like to know how to check the Bluetooth version on macOS. There have been similar questions in the past, and the answers suggested checking the LMP Version in the system profile to find this information. However, in the latest macOS (Sonoma - 14.2.1), this method no longer seems to work. According to other posts on platforms like Reddit, it appears that this change has persisted at least until version 12. I considered using terminal commands for more detailed information, but the results were similar. ❯ system_profiler -detailLevel full SPBluetoothDataType Bluetooth: Bluetooth Controller: Address: 3C:06:30:0F:92:18 State: On Chipset: BCM_4378 Discoverable: Off Firmware Version: 21.1.527.3724 Product ID: 0x4A01 Supported services: 0x392039 < HFP AVRCP A2DP HID Braille LEA AACP GATT SerialPort > Transport: PCIe Vendor ID: 0x004C (Apple) Wanted to check if anyone here has insights or alternative methods to determine the Bluetooth version on the latest macOS. If there's a command-line solution or any other approach that works with recent macOS versions, I would greatly appreciate the guidance.

Hi, I'm working on an SPM library that uses CoreBluetooth. Since I need to work with Bluetooth in background, I've set CBCentralManagerOptionRestoreIdentifierKey option to my instance of CBCentralManager. When I run the unit tests I encounter the following exception: Thread 1: "State restoration of CBCentralManager is only allowed for applications that have specified the "bluetooth-central" background mode" Of course, my demo application that I use to test the library has the bluetooth-central background mode checked. I think the issue is related to the fact that when the test target is executed, there is no associated application. Can background modes be applied to the package? How can this be resolved?