core-bluetooth

Is it possible to be notified when a Bluetooth Device is connected or disconnected from iOS even when my app is in background ? On Android, I use the ACTION_ACL_CONNECTED and ACTION_ACL_DISCONNECTED events. But I cannot find equivalents for iOS. I found the CBCentralManager that can be used to monitor Bluetooth events, but my functions aren't called when a bluetooth device is connected/disconnected, only when I enable/disable the bluetooth. Is it an error on my side or is it normal ? I also found the doc about Audio Route changes, that can also be an idea to detect the bluetooth connections

It seems this question was "answered" here , but without any code to show what they did differently I'm having to ask a new question. I have my own code with the same behaviour, where scanning for specific CBUUIDs using Core Bluetooth's CBCentralManager on OS X doesn't discover an iOS device acting as a peripheral with CBPeripheralManager (unless it and its services have previously been discovered). To see if it's something wrong in my code, I downloaded Apple's sample code . Running the sample code on two iOS devices works as intended, however when copying the CBCentralManager code to an OS X

Problem: I need to remain disconnected from a BLE peripheral but send data it's data to a server for processing as often as possible, as it is potentially time-critical. In other words, I want to connect every so often and send the synced data to an API, while remaining disconnected at all other times to save battery life. Failed Attempt: Setting the UIBackgroundModes field of my app's Info.plist file to bluetooth-central only gives me background execution while I am connected. I want to remain disconnected, but reconnect at predefined intervals, as well as schedule an alarm from background

I setup a few BLE connections in my view controller, SViewController, and I need to store the peripherals for use in other view controllers. I've tried creating an NSUserDefault object and storing the peripherals in there, but I got the error "Attempt to insert non-property value" , and it never inserted. I then tried wrapping it up in an NSData object and storing it in NSUserDefaults, but got the error "-[CBConcretePeripheral encodeWithCoder:]: unrecognized selector sent" and the app crashed. So that definitely did not work. I've also tried making the three CBPeripheral variables global, but

I have an iOS app that is connecting to a device (arduino) using a BTLE. Everything is working fine on my iPad iOS 7. After upgrading to iOS 8, the CBCentralManager is not finding any peripherals. - (void)startScanningForSupportedUUIDs { [self.centralManager scanForPeripheralsWithServices:nil options:nil]; } I don't know what can be the problem. I have the solution, for some reason in iOS 8 there is some delay after instantiate your CBManager. You need to start to scan when the CBCentralManager is on, in this method: -(void)centralManagerDidUpdateState:(CBCentralManager *)central{ switch