XPC Error CoreBluetooth

I'm getting the same issue on iOS 10 and an iPhone 6s. Was there any solutions found to this?

I'm seeing the same error (below) deploying a similar Bluetooth test app from Xcode 8 to an iPhone 6 running iOS 10. I would be interested to know if you found a solution.

[CoreBluetooth] XPC connection invalid

Looking at the logs on the phone, I see the following entries from the BTServer process just before the app gets the above error:

Sending 'session attached' event for session "MyTestApp-central-541-0"

Registering central session "MyTestApp-central-541-0" with backgrounding: on, persistence: off

Sending 'state updated' event with state "On" to session "MyTestApp-central-541-0"

Sending XPC message "CBMsgIdStateUpdated" to session "MyTestApp-central-541-0"

Received XPC message "CBMsgIdCheckOut" from session "MyTestApp-central-541-0"

Unregistering central session "MyTestApp-central-541-0"

Unregistering session "MyTestApp-central-541-0"

Sending 'session detached' event for session "MyTestApp-central-541-0"

Sending XPC message "CBMsgIdFinalized" to session "MyTestApp-central-541-0"

I think the problem might be that the instance of your Bluetooth() class created in ViewController.viewDidLoad() is going out of scope just as CoreBluetooth is initializing in the background (asynchronously). Try adding a property like this at the top of ViewController:

let bluetooth = Bluetooth()

Then in viewDidLoad() call your connect() function on the instance.

Thanks, it is the perfect solution, i found in internet. Thanks again

I don't understand your solution.

I’m struggle with the following Swift code for Mac OS.

If I add the line "centralManager = CBCentralManager(delegate: self, queue: nil)” and run the code I get the error XPC connection invalid.

To be complete I tried the following but it gives the same error:

import Foundation

import CoreBluetooth

class BlueToothModel:NSObject, CBCentralManagerDelegate, CBPeripheralDelegate {

func centralManagerDidUpdateState(_ central: CBCentralManager) {

}

var centralManager : CBCentralManager!

var RSSIs = [NSNumber]()

var data = NSMutableData()

var writeData: String = ""

var peripherals: [CBPeripheral] = []

var characteristicValue = [CBUUID: NSData]()

var timer = Timer()

var characteristics = [String : CBCharacteristic]()

func initBluetooth() {

centralManager = CBCentralManager(delegate: self, queue: nil, options: nil)

}

}

import Cocoa

class ViewController: NSViewController {

let bluetooth = BlueToothModel()

override func viewDidLoad() {

super.viewDidLoad()

bluetooth.initBluetooth()

}

}

I solved the problem.

There are differences between iOs and macOS, because I did not write a program for macOS for several years I was a bit rusty.

I have seen a few time a line with ( put this in your info.plist.)

never been able to do it :-)

on this page

https://developer.apple.com/library/content/documentation/NetworkingInternetWeb/Conceptual/CoreBluetooth_concepts/CoreBluetoothOverview/CoreBluetoothOverview.html

"Important: An iOS app linked on or after iOS 10.0 must include in its

Info.plist

can you help me to ad thisto my info.plist ?

after reaing your post

"In iOS you must set in your info.plist the “Private Bluetooth Peripheral Usage" but in macOS it is not required".

i was able to add a line in my info.pllst. very happy about that

the line seem to be

Privacy - Bluetooth Peripheral Usage Description

sadly i still get the same error

Turning bluetooth On on Capabilities solved the issue.

I have developed a few apps using bluetooth and something i keep forgetting is the capabilities in xcode. I have mostly done it in flutter.

1. When opening your target "Runner" go to signing and capabilities.
2. Click on the "+ capabilities" and look for "background execution modes"
3. When using BLE go select the bluetooth le... checkbox.
4. clean build folder and restart xcode or the ide you are using and go rebuild ios. REBUILD EVERYTHING.

Assuming, you also have the correct permissions in the info.plist.

additionally bluetooth requires location too so select accordingly.