core-bluetooth

I'm writing an app using Swift on Xcode that connects to a bluetooth BLE peripheral. I've established a connection to a the device, and want to read some data from a specific characteristic (specifically FFF1 in service UUID FFF0). I'm able to request a read of characteristics using the following code if the characteristic that I want to find info for is characteristicx : peripheral.readValueForCharacteristic(charactericsx) What I want to know is this: How do I check that this read value is what I'm looking for. I want to be able to do an if statement to check my value against the discovered

I am using core-bluetooth framework for my app in Iphone-4s. This is typically has to be a background app which can run as longer as possible. Now it is only running for 40 min - 1 hour max. I am hoping for at least 1 day or so. For this "bluetooth-central" value is added in "Required background modes" key in .plist file. It seems like my app is going to "suspend" mode, at the end. since when I open the app again (background to foreground state) it is sending the notification again, it means the bluetooth connection is still connected and BLE-device is still sending notification. If i press

I am trying to send an .png image file from one iOS Device to another over Bluetooth 4.0 LE. I am able to simple pieces of data like strings, but unable to successfully send and utilize image files. In the Peripheral device, I start out with this pictureBeforeData = [UIImage imageNamed:@"myImage.png"]; NSData *myData = UIImagePNGRepresentation(pictureBeforeData); Then I make myData a characteristic's value. _myCharacteristic = [[CBMutableCharacteristic alloc] initWithType:_myCharacteristicUUID properties:CBCharacteristicPropertyRead value:myData permissions:CBAttributePermissionsReadable]; In

I have an app that needs to detect a nearby (in range for Bluetooth LE) devices running the same application and iOS 7.1. I've considered two alternatives for the detection: Having the devices act as iBeacons and detect iBeacons in range Using CoreBluetooth (like in Vicinity implementation here ) to create a BLE peripheral, advertise that and scan the peripherals It seems that the option 1 is out of the question because: It may take at least 15 minutes for iOS to detect entering a beacon region when the application is running background (iOS 7.1) Option 2 seems the way to go, but there are

Can iOS (iPhone or iPad) app have Core Bluetooth (BTLE) central manger and peripheral manager objects at same time? Can they operate asynchronously, or does main app thread need to make them share (switch back and forth). Sharing conceptual algorithm would be: disable peripheral manager, enable central manager and do central functions, and then, disable central mgr, enable peripheral mgr, and do peripheral functions (that is, send automatic nofications, and wait for and respond to remote characteristic commands), repeat... BACKGROUND GORY DETAILS: We have a local system with multiple iOS

Goal I am developping a simple device running Linux. It is BLE capable, and I am currently using bluez 5.8. I want to trigger an action on this device using an iPhone. What already works: I can make the iPhone "see" the device. The iPhone also connects to the device. I setup the bluetooth device like this on linux (thanks to this question ): # activate bluetooth hciconfig hci0 up # set advertise data: "hello world" hcitool -i hci0 cmd 0x08 0x0008 48 45 4c 4c 4f 57 4f 52 4c 44 # start advertising as connectable hciconfig hci0 leadv 0 The iOS code is straightforward: - (int) scanForPeripherals {