I want to continuously communicate with BLE device in in one of the my iOS application. Is it possible?
How can i achieve this?
Thanks,
Not sure what do you mean by Background mode. Do you mean when the app is minimized or do you mean in background thread?
As far as being continuously connected with the BLE device is concerned then yes it is possible! Provided your BLE device is continuously powered on and available.
You'd have to search for particular service and then its characteristics using Core Bluetooth.
Mind you this could be a battery draining operation.
Suggestion would be to connect read what you want to read and disconnect.
Related
I have a basic BLE App that I am running with Objective-C. I am using PeripheralManager and running my iPhone8 as a peripheral with serivces, characteristics added.
What I would like to do is connect to a central device that I know by Device ID or when it comes within range.
I have written a BLE App for Android that does this now. All I have to do is trigger the device.connectGatt() when onConnectionStateChange() is connected. This is in the BluetoothGattServerCallback() eventHandler.
What is the equivant for this in iOS? Keep in mind I that this is at connected state, not when the central has subscribed for services. This seems obvious in BluetoothGatt on Android but not see anything obvious in iOS PeriphalManager.
Anyone done anything similar? Seems to be a basic question, please help.
In CoreBluetooth it is the central that makes the connection.
If you know the device-specific identifier for a peripheral (ie, you have previously discovered it on this central device) then you can attempt to retrieve a CBPeripheral instance from the central and then issue a connect. This will complete when the device comes into range. If you allow background mode then this connect can be completed when your app is in the background.
i have an application that is connected with a chip by bluetooth.
Device and phone are constantly connected to calculate the distance between them by bluetooth delay in reply.
App is working fine in foreground.
When i go background the app is still running, but cannot connect to the device.
I already tried to fix with this guide: Core Bluetooth Programming Guide
but i didnt made it.
Some suggestion?
You need to introduce more detail.
Your app will not run in background mode even bluetooth connection is on.
But your app still have a chance to execute some code in a short time if some bluetooth event happen.
Connection lost.
Notification received.
If your application work like anti-loss bluetooth tag, you need
Enable background in iOS app.
Write your code in core bluetooth delegate.
And One reminder: Calculate distance based on bluetooth relay is not smart. Bluetooth communication is not designed to support this kind of feature.
It work on license free 2.4G band and human body has big impact on it.
I am trying to make an Application using iBeacon in which One device will work as beacon Broadcaster and another one as Receiver.I gone through the similar thing in Run iPhone as an iBeacon in the background but the solution that present there is not for API of iBeacon so i am asking this thing again.
I succeed in being notified on Detector Device(receiver) even the App is in Background or in Quit mode. but Whenever Broadcaster Device's App goes in Background it stops Broadcasting packets and become no more as beacon. When it comes back in Foreground it again works fine. So the issue is Broadcaster has to be always in Foreground to Act as Advertiser or Broadcaster.
Is there anyway to advertise/Broadcast packets of iBeacon's even when App is in background mode.
I have enabled capabilities "Location Update" and "Acts as a Bluetooth LE accessory" from xCode.
Unfortunately, it is simply not possible to advertise as an iBeacon in the background on iOS. For an explanation as to why, see here: Can we start iBeacon transmitter in background?
Apple doesn't authorize it, it would be a mean to track an user which is quite against Apple current policy to preserve users' privacy.
The capabilities "Acts as a Bluetooth LE accessory" is to enable your application to continue being used as a bluetooth device (with a connection) when the app go in background mode. Advertising isn't a connected usage of bluetooth and isn't concerned by this capabilities.
I would like do coding in ios with Bluetooth low energy(BLE). i wanting to show notification of new BLE device while app background. is possible do it? I bought BLE Device from sensor tag site.
Yes, it is possible both in central and peripheral mode. You should declare the necessary permissions in your Info.plist and then you can search for one specific service in the background with the standard method scanForPeripheralsWithServices:options: of CBCentralManager Start with reading the docs of Apple.
Is there a possibility to receive BLE notification in your application for a specific UUID or whenever any UUID gets in range while the application is not running? E.g. the same way Push Notifications work?
I tried to google around but so far no helpful information that I could achieve. Any pointers?
Checkout background execution modes. The app does not need to run in foreground in this case, but it needs to have been started before and has to be in background at least.
iOS7 introduces a Bluetooth state preservation and restoration for long term Bluetooth tasks. By these means, even a terminated app will be restored in background mode by the os.
This is now possible after the iOS 7.1 update