I am trying to find a way to access the battery levels from my beacons through an iOS application I am currently working on. I am using Kontakt's iBeacon devices. I browsed the Estimote iOS SDK and they provide a method to achieve this. I was wondering if it is at all able to access the raw beacon packet and manually extract the data since I know the beacon packet structure and the information is there.
Any thoughts on how to achieve this by the method mentioned here or any other way?
Thanks Guys.
This is Rafal from kontakt.io. Firstly, let me thank you for choosing us, it means a lot for us.
Propagation of battery level is not standard for iBeacons nor it is in any official iBeacon documentation, so that is why you cannot find the value using custom SDKs. Our iBeacons are propagating battery level in scan response packet which may be discovered using CoreBluetooth API in iOS. The level is one byte value at the 23rd byte in the packet.
Hope it helps :)
As far as I am aware there is nothing in the iBeacon advertisement itself that contains the battery level. Some beacons may expose additional BLE ATT services that contain this information. You could try using an application like LightBlue from the app store to explore the services available from your devices
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For a project of mine I need a pairless bluetooth data transfer. I have first thought about doing it with BLE IBeacons but they can only advertise a very limited amount of data. I looked further through the Apple documentation and found this tutorial about Central/ Peripheral
BLE data transfer. I've implemented the code in my project but even though the devices were very close together they could not "see" each other. I have since looked up on the Internet and could not find a hint about whether the devices need pairing or not and what the problem of mine could be(the code is not throwing any errors nor warnings).
If it does require pairing, is there some way to do that in the background without requiring the user to perform an action, so that I could theoretically advertise some kind of pair request via. IBeacons to then transfer the data? If that's not the case, is there even a way to transfer data (mono directional, round about 512 bytes) between nearby bluetooth devices without user actions?
greets from germany!
To get started with Bluetooth Low Energy or any other protocol, it's best to learn how it works. At least basics.
Simplifying. BLE allows you to send data:
"Passive" (without conncetion) - over Advertisement Data. The size of the packages depends on the BLE version.
"Active" (requires connection with the device) - bidrirectional comunication. In this case size of the data package also depends on the BLE version.
Bonding and pairing is a separate issues.
I suggested you look at the following book:
https://www.oreilly.com/library/view/getting-started-with/9781491900550/
The websites of BLE module manufacturers also offer a lot of information about this technology. For example Nordic or TI. Very often with sample programs for various platforms.
For iOS:
https://developer.apple.com/videos/play/wwdc2017/712/
https://developer.apple.com/bluetooth/
You may also be interested in sending more data without connection using version BLE 5.0
https://www.bluetooth.com/blog/exploring-bluetooth5-whats-new-in-advertising/
I'm hoping to create a BLE advertisement on iOS where I can control the advertisement on a byte level.
One use case would be to mimic an iBeacon advertisement. What is the iBeacon Bluetooth Profile (I want to advertise while my app is in the background which is why I'm not using CoreLocation)
I do not see a way to do this with the Core Bluetooth API. Is this correct? Are there alternatives using private API's or jailbreaking?
As the others already pointed out, there is no API on iOS that allows you to do this.
You can advertise as an iBeacon, but only when your app is in the foreground. When in background, the advertisement is removed and therefore cannot be discovered anymore (except for other iOS devices which explicitly scan for that service UUID). Also see the documentation here: Core Bluetooth Background Processing
If you would share your use case and what you want to achieve, maybe there are other ways to realise it.
My experience with iOS is that if it is something is not exposed in the API, there is no way around, except jailbreaking. For Bluetooth low energy the API is at GAP/GATT level, and very little at the lower levels (if anything) is exposed. Advertising is a LL (link layer) feature.
To illustrate how restricted the access is: When scanning for BLE devices you will not have access to the advertiser's MAC address iOS. In Android you have it.
I do not see a way to do this with the Core Bluetooth API. Is this
correct?
Since you have to set Manufacture Specific Data in order to achieve this, if nothing has changed you will experience exactly the same issue that I did. Explained here:
The advertisement key 'Manufacturer Data' is not allowed in CoreBluetooth
It is not possible.
I am trying to wrap my head around the possibilities of the HM-10 but am very new to a lot of how it works. I am only familiar with higher level things.
I originally thought I was going to use the hm-10 as an iBeacon but quickly found out it's limitations. Here was the original plan prior:
iBeacon(HM-10) broadcast in a particular room, when I walk in with my iPhone, it detects my iPhone and then does something, i.e Sets one of its Pins to High.
But based on my research now, this is not possible with iBeacon? I need to use iBeacon broadcasting in hand with regular bluetooth?
As in, upon my App/Phone detecting the iBeacon it then pairs with the HM-10 and sends an AT- command to set one of the pins HIGH.
Does all of this make sense? Could anyone provide some more input?
I am in the process of putting together an iPhone App but just wanted to know if I am on the right track.
Since the HM-10 is based on the CC2540, it should be possible to turn it into a Bluetooth LE beacon, including one that supports an iBeacon format.
A few thoughts to help your understanding:
Standard Bluetooth LE beacons (AltBeacon, iBeacon, URL beacon) are transmit only devices that don't detect phones -- phones detect them using a custom app. So when you say "it detects my iPhone and then does something" this is diverging from a standard Bluetooth LE beacon.
The concept of "pairing" with a Bluetooth device is typically related to Bluetooth classic (e.g. pre-4.0) technology. Bluetooth LE devices like the beacons mentioned above have the concept of connecting to read and write GATT characteristics.
If you do build a custom BLE device that out of a HM-10/CC2540, it would be possible to make it "detect" mobile phones, perhaps by advertising a GATT service, and then doing something upon connecting and/or writing to a characteristic. Since the CC2540 contains GPIO pins, it would be possible to make it "do something" by making a pin go high.
There are two big chunks of work to doing what you describe: (1) writing custom firmware for the CC2540 and (2) writing an iPhone app using CoreBluetooth and/or CoreLocation iBeacon APIs. Before starting on the iOS side, you need to figure out how the Bluetooth device is going to work.
Is it possible to discover Gimbal beacons using the iOS SDK? I want to use simple ranging but I don't know the UUID of the transmitter.
YES, you can use Gimbals as iBeacons. You have to re-configure it using iBeacon configuration.
Login to Gimbal website, create an account if you don't have one.
https://proximity.gimbal.com/
Open Proximity tab. Click on Manage Configuration button at the top and create new configuration, select iBeacon as beacon type, assign UUID, major and minor. You can choose any UUID you'd like.
Now register your Gimbal beacon, and select your new configuration. You must open the beacon to get to the Factory ID that is required to register.
Download Gimbal manager app for iPhone, open it, select "Configure" option. Open Gimbal and remove battery, put the batter back in, and you should see your beacon in the Gimbal Manager app, click the Update button.
That's it, now you your Gimbal is in iBeacon mode.
If anyone interested, I found this useful post on http://beekn.net/2013/12/inside-gimbal-qualcomm-beacons-tackle-bluetooth-le-challenges/:
Actually, you can’t sniff the iBeacon UUID as Gimbal use their own implementation for their beacons. They use BLE to transmit encrypted IDs that change with each broadcast, so it needs to validate with the SDK / API to confirm which beacon ID this ties up to.
update: davidyoung is right. There is some info that I skipped in Gimbal's documentation:
If your application's use case requires you to use iBeacon technology, the Gimbal Series 20 beacon can be configured to broadcast iBeacon compatible BLE packets. To learn how to configure a beacon to be iBeacon compatible please read the Proximity Quickstart Guide. The Proximity framework makes it very easy to use both iBeacons and Gimbal beacons from the SDK and lets you manage them through the Gimbal Manager Portal.
Interesting - I recently received a reply from Radius Networks that said ScanBeacon cannot identify Gimbal beacons - at least that's how I read it..
"Scanbeacon should display any device that is transmitting an ibeacon advertisement.
We have had several reports that the little blue beacons that Qualcomm has been making available are not showing up with ScanBeacon.
Our own investigation into these units is that they are not advertising the iBeacon identifiers.
There may be some configuration or other steps that need to be taken that we are not aware of.
But the out-of-the-box state of the Qualcomm beacons appears to be no iBeacon advertisement."
To use iOS, you will need to know the UUID.
There are some other options that do not require knowledge of the UUID.
If you have an Android device w/ 4.3 or later and support for BT4.0, you can use the free Locate application at the following link. https://play.google.com/store/apps/details?id=com.radiusnetworks.locate
If you have a Mac w 10.9 or higher and support for BT4.0, you can use the ScanBeacon app ($9.99) available on the Mac App Store or at this link. http://www.radiusnetworks.com/scanbeacon-app.html
Good luck, and make sure you report back your findings to rest of the community!
David
Full Disclosure: My colleagues just firmly reminded me that I'm misbehaving by not noting that I work for Radius Networks, who provides the tools listed above, and am the developer of the second tool listed, ScanBeacon.
I've been googling this problem, but haven't gotten the wording right.
Basically I'm looking for an API, or some seeds of guidance in how I would go about writing a program where you get push notified if someone is in the same area as you based on GPS coordinates. In short: a realtime 4square not based on checking-in but based on GPS.
Part of me feels like this is something Apple may frown upon, but if the user is notified and making the decision to run the app, perhaps not.
Thanks in advance.
You're looking for the Bluetooth Bonjour type notifications found in GameKit. This has nothing to do with GPS and is instead based of short range radio (Bluetooth) which advertises itself using a zero conf protocol. The APIs basically give you the ability to broadcast your service (eg. "MyGame") over bluetooth and listen for others potentially broadcasting the same service.
If you're talking about geographic vicinity, you'll need to set up a central server where each device can register its location, and which will provide locations of nearby devices. A service like FourSquare does exactly this kind of thing.
Another way to look at 'vicinity' is network vicinity. You could have each device advertise itself via Bonjour and look for other devices doing the same.