I have an accessory which receives internet connection via iPhone Personal hotspot.
And I developed a service on the device from which I plan to pull updates every 1 minute. Or as an alternative it keeps consistent websocket connection.
I know that I can communicate to my device through Bluetooth PAN is possible however I would like to do it in background while the device is connected.
If someone is interested I asked a question before about this: Is possible to communicate via Bluetooth PAN in iOS with tethered devices
What background mode could be used to keep consistent connection with my accessory through Bluetooth PAN network? Could modes "bluetooth-central" or "bluetooth-peripheral" or "external-accessory" be used without using CoreBluetooth or ExternalAccessory framework?
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I am talking the silentbeacon.com personal safety alarm device. How is it able to connect with the phone with bluetooth while the screen is locked. I am looking for an IOS solution.
Just because the screen is locked on the iOS device doesn't mean it cannot do any Bluetooth functionality. iOS devices have a special background mode that allows them to continuously read BLE adverts and also communicate with remote BLE devices. You can find more about this here:-
CoreBluetooth background processing for iOS apps
BLE device keeps connecting with iPhone when app terminates
iOS - BLE scan and connect to peripheral in background
I am developing app which interacts with iBeacon. I've seen my app is able to detect iBeacon even if bluetooth is off. I am unable to find any documentation of this behaviour. Can anyone share official verdict/documentation what actually is going on behind the scene?
Thanks
When you tap the Bluetooth icon in Control Center to turn it “off” the icon changes from Blue to Grey, but this does not turn off Bluetooth. It just disables Bluetooth connections while allowing iBeacon scanning and scanning for other Bluetooth devices to continue.
You can verify this for yourself by turning the Bluetooth icon to the off position in Control Center like this:
Then drill down into settings to see that the Bluetooth switch is still enabled but below that connections are now disabled.
You cannot detect if a phone is in this state, but if your app constructs a new CBCentralManager when the phone is in this state, iOS will automatically put up a dialog like this:
If you are not using CBCentralManager, then it doesn't make any difference whether the phone is in this state or not -- you can scan for other devices (iBeacon using CoreLocation or non-iBeacon bluetooth devices using CoreBluetooth) the same way regardless of whether the phone is in this mode.
If i have bluetooth headphone connected from setting screen and now in my calling application call is ongoing, and in background i will disconnect headphone and then come to my application but i didn't get any event of core bluetooth that can identify headset is connected or disconnected.
So any one can help me about this scenario. if you have any question you can ask me.
I need to programmatically detect the connect and disconnect event of any bluetooth device with iPhone, while app is in background.
I'm developing a Bluetooth Low Energry (BLE) enabled DSLR (digital camera) controller that receives GPS coordinates and allows remote focus/shutter controls.
In the ideal case, I'd not have to take my iPhone out of my pocket.
The BLE device connects as soon as my camera is turned on, and this should launch the app if it's not launched already. When the camera is turned off, BLE disconnects and the app should go into sleep mode (stop updating location and sending data over BLE) (note that app might be in background at this time). When the camera is turned off again (while app is in background/iphone locked), the app should reconnect and start updating location and sending data to the BLE receiver.
It's a lot to ask and might be too good to be true, but is this possible?
(iOS 7+ SDK is OK)
You can operate as a Bluetooth LE central (scanning for peripherals) in the background - Refer to the Core Bluetooth Programming Guide however, while in the background peripheral scanning and detection may not happen as quickly as when the app is in the foreground.
Your app could post a local notification when the peripheral was detected, and the user could respond to this notification to launch your app into the foreground, but you cannot force your app into the foreground without user interaction. You can send information to the camera via BLE even while your app is in the background and you can receive location information while in the background too - refer to the Core Location programming guide.
The disconnection is straight-forward. When you detect a disconnection you can shut down location services to conserve battery power.