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Estimote Indoor Location SDK

Estimote Indoor Location SDK allows real-time beacon-based mapping and indoor location.

We know that building the next generation of context-aware mobile apps requires more than just iBeacon™ hardware. That's why we've built smarter software that abstracts away the difficulty of understanding proximity and position within a given space.

Estimote Indoor Location is a sophisticated software solution that makes it incredibly easy and quick to map any location. Once done, you can use our SDK to visualize your approximate position within that space in real-time, in your own app.

Indoor Location creates a rich canvas upon which to build powerful new mobile experiences, from in-venue analytics and proximity marketing to frictionless payments and personalized shopping.

Estimote Indoor Location works exclusively with Estimote Beacons.

Learn more:

• Build an app with Indoor SDK tutorial.
• Go through our Developer Portal.
• Read comprehensive SDK Documentation.
• Download our Estimote Indoor Location app from App Store and play with Indoor Location.
• Check our Community Portal for more information about Estimote platform.
• Post any remaining questions on Estimote Community Forums to get help from Estimote and the beacon community.

Table of Contents

• How does Indoor Location work?
• Installation
• Key Concepts
• Usage
  • Setting up a new location
    • Manually, using EILLocationBuilder
    • Via Estimote Indoor Location App
  • Obtaining position update inside the location
  • Obtaining position updates in background
  • Managing locations in the cloud
• Changelog

How does Indoor Location work?

Indoor Location SDK enables creating location through builder and obtaining position updates from the location. Besides location builder there is also possibility of mapping location through Estimote Indoor Location App.

The mapping process is simple. First, you'll need to map the shape. Start by walking around a location and stick as close to the perimeter as possible. Remember to hold the phone in front of you for the location to be mapped properly. The app will now suggest the number and placement of beacons. Affix them on the walls at chest height. To finalize the process walk around the location once more (again with the phone in front of you). Stop at each beacon along the way, to complete this one-time configuration process.

There is a nice video tutorial by @phillydev716 on YouTube on how to use Indoor Location in your app. Please note, that video tutorial uses older version of our SDK (v.1.6).

Installation

SDK is available as EstimoteIndoorSDK in CocoaPods. Installation is just a matter of putting following line in your Podfile.

pod 'EstimoteIndoorSDK'

Alternatively you can add SDK manually:

1. Drag-and-drop the EstimoteIndooLocationSDK directory (containing libEstimoteIndoorLocationSDK.a, Headers and Resources) into your project in Xcode. Make sure the "copy items if needed" checkbox is selected.

2. If you are not already using EstimoteSDK in your project, add EstimoteSDK framework to your project. This is what your catalogue structure should look like:

   

3. Open your project settings and go to the "Build Phases" tab. In the "Link library with binaries" section click the "+" button and add the following frameworks that are required by EstimoteIndoorLocationSDK:

   • CoreMotion.framework
   • AudioToolbox.framework
   • MediaPlayer.framework
   • MessageUI.framework
   • libz.tbd

   While you're on this tab already, double-check if libEstimoteIndoorSDK.a is included in the "Link library with binaries" list. This should've happened automatically when you were copying the EstimoteIndooLocationSDK directory into the project during step 1. If for some reason it didn't, drag-and-drop the libEstimoteIndoorSDK.a file from the Project navigator onto the list.

4. Go to "Build Settings", find "Other Linker Flags" and add -lc++. Additionally, set Enable Bitcode to NO.

5. That's it! By this point, your project should compile successfully and you should be able to start using EstimoteIndoorLocationSDK.

6. If you're coding in Swift, there's one more extra step necessary: to add a Bridging header file to expose Objective-C headers to Swift.

   To do that first add a new file to the project - make it a Header file and call it YourProjectName-Bridging-Header.h. In this file you need to import the following EstimoteIndoorLocationSDK and EstimoteSDK headers:

   #import "EILIndoorLocationManager.h"
   #import "EILLocation.h"
   #import "EILIndoorLocationView.h"
   #import "EILLocationBuilder.h"
   

   After all that, your Bridging header could look like this:

   

   Finally, click on your project root item in the Project navigator and go to Build Settings tab. Make sure that All is selected, then look for Objective-C Bridging Header and set it to $(PROJECT_DIR)/YourProjectName/YourProjectName-Bridging-Header.h. Now you're good to go!

Key concepts

Note that Estimote Indoor Location uses Cartesian coordinate system, which is different than iOS coordinate system.

Location represents a physical location. It is a simple polygon constructed out of points.

Location has a property orientation which denotes angle between magnetic north and vector [0, 1] counted clockwise. See following image for graphic description:

On a location’s boundary segments can be placed doors, windows which are called linear objects.

Usage

Setting up a new location

There are two ways of setting up a new location. You can use for this purpose ESTIndoorLocationBuilder, as manual tool, or Estimote App and fetch location from cloud.

Manually, using EILLocationBuilder

You have the option to create an EILLocation manually. For that use the EILLocationBuilder class.

In order to construct a new location you need to:

• set the shape of the location and its orientation
• add details such as beacons, walls, doors on boundary segments

The shape of the location is defined by its boundary points. For example, consider a square defined by points (0,0), (0,5), (5,5), (5,0) along with its orientation with respect to magnetic north.

EILLocationBuilder *locationBuilder = [EILLocationBuilder new];
[locationBuilder setLocationBoundaryPoints:@[
[EILPoint pointWithX:0 y:0],
[EILPoint pointWithX:0 y:5],
[EILPoint pointWithX:5 y:5],
[EILPoint pointWithX:5 y:0]]];

[locationBuilder setLocationOrientation:0];

Points that define the shape of location also define its boundary segments. They are indexed in the same order as the points. In this example there would be the following 4 segments: [(0,0), (0,5)], [(0,5), (5,5)], [(5,5), (5,0)], [(5,0), (0,0)].

The next step is to place beacons and doors in the location:

[locationBuilder addBeaconIdentifiedByIdentifier:@"aabbccddeeff"
atBoundarySegmentIndex:0
inDistance:2
fromSide:EILLocationBuilderLeftSide];

Using ESTIndoorLocationBuilder you can also place beacons inside the location (addBeaconWithIdentifier:withPosition:, addBeaconWithIdentifier:withPosition:andColor:), which is not possible with mapping tool in Indoor Location App.

Note that methods used for adding beacons that are identified by their mac addresses are now depracated. Please use methods using identification by identifier instead.

Via Estimote Indoor Location App

Using Estimote App the procedure consists of the following steps:

• configuring beacons
• placing beacons
• mapping the physical location to an instance of EILLocation

If you mapped a location it was automatically uploaded to your Estimote Cloud account. You can fetch it from Estimote Cloud in your own app (see section: Managing locations in the cloud).

Obtaining position update inside the location

Once you have instance of EILLocation you can start monitoring and obtaining position updates for that location.

Monitoring location is simply determining if the user is currently inside or outside the location. In order to monitor location, first you need to create instance of EILIndoorLocationManager and start monitoring for that location.

EILIndoorLocationManager *indoorLocationManager = [EILIndoorLocationManager new];
[indoorLocationManager startMonitoringForLocation:yourLocation];

To obtain position updates, you need to set a delegate which will be receiving the updates.

indoorLocationManager.delegate = yourDelegate;
[indoorLocationManager startPositionUpdatesForLocation:yourLocation];

In addition to position, updates provide also information about accuracy of determined position which can be visualized via EILPositionView or EILPositionNode as avatar with a circle of given radius within which the real position is expected to be.

Note, that you need only one Indoor Location Manager to monitor multiple locations. However, position updates are available for only one location at the same time. If you need to enable position updates for new location, first you need to stop position updates:

[indoorLocationManager stopPositionUpdates];

In order to have Indoor Location status change and position updates without delay, you should start Indoor Location Manager and monitioring for Indoor Location early.

EILIndoorLocationManager position updates can be delivered in three different modes.

• EILIndoorLocationManagerModeStandard - provides stable and responsive position updates. This mode is compatible with all devices. This is the default mode of EILIndoorLocationManager.
• EILIndoorLocationManagerModeExperimentalWithInertia - provides more responsive position updates thanks to using inertial sensors. Requires device to be in portrait mode. This mode is not supported by iPad & iPod device families.
• EILIndoorLocationManagerModeExperimentalWithARKit - provides hyper precise and responsive position updates thanks to using ARKit. If you are designing a mixed-reality experience this is the suggested mode. Requires iOS 11 device compatible with ARKit World Tracking. You need to add NSCameraUsageDescription key to the Info.plist file, explaining how your app is going to use this privilege. For example, "We use Augmented Reality to give you a virtual tour around the museum." Note: Augmented Reality Kit relies on access to the camera to work correctly. You need to add NSCameraUsageDescription key to the Info.plist file, explaining how your app is going to use this privilege. For example, "We use Augmented Reality to give you a virtual tour around the museum."

In order to change mode simply change mode property of EILIndoorLocationManager object.

indoorLocationManager.mode = EILIndoorLocationManagerModeNormal;

If the position updates delivery is in progress it will effectively restart position updates with new mode.

Obtaining position updates in background

If you want your Indoor Location enabled app to also work, when the app is running in the background, you have to use EILBackgroundIndoorLocationManager. It works in a very similar way to the EILIndoorLocationManager. You just need to add the following code to the AppDelegate.m:

EILBackgroundIndoorLocationManager *backgroundIndoorLocationManager = [EILBackgroundIndoorLocationManager new];
self.backgroundIndoorLocationManager = backgroundIndoorLocationManager;

In order to work properly your app needs access to bluetooth also when it is in background. To set that you need to go to the project settings, find "Capabilities" tab, set "Background modes" to On and check "Uses Bluetooth LE accessories".

In order to relaunch the application (if it is killed by operating system or user) as the user enters the location "Always in use" Location Services authorization is required:

[self.backgroundIndoorLocationManager requestAlwaysAuthorization];

For best UX patterns for requesting permission please refer to the following blog post. Also you need to go to the project settings, find "Capabilities" tab, set "Background modes" to On and check "Uses Bluetooth LE accessories".

To obtain position updates, you need to set a delegate which will be receiving the updates:

backgroundIndoorLocationManager.delegate = yourDelegate;
[backgroundIndoorLocationManager startPositionUpdatesForLocation:yourLocation];

To stop updating position:

[backgroundIndoorLocationManager stopPositionUpdates];

Important notes:

• There is no need for calling startMonitoringForLocation.
• This code should be in AppDelegate.m - this way iOS can revive the app when you enter location, even if it was killed earlier.
• In background only the light mode is available, so there is no need of setting it.
• Foreground and background location managers are seperate. If you want to use both modes in your app, you have to use both managers.

Managing locations in the Estimote Cloud

To manage your locations, you can use requests that allows communication with Estimote Cloud.

Provided requests are as follows:

• EILRequestAddLocation - request for saving a new location to Estimote Cloud
• EILRequestRemoveLocation - request for removing a new location from Estimote Cloud
• EILRequestFetchLocation - request for fetching location identified by its identifier. Location has to be public or belong to currently authorized user
• EILRequestFetchPublicLocations - request for fetching public nearby locations
• EILRequestFetchLocations - request for fetching locations from Estimote Cloud for currently authorized user
• EILRequestModifyLocation - request for modifying already existing location in Estimote Cloud

Each location saved in Estimote Cloud is given a unique string identifier that corresponds to the identifier property of EILLocation. You can find it on cloud.estimote.com, on the "Locations" screen, and use it with the Indoor SDK to, among other things, fetch your stored location from Estimote Cloud. Example of fetching location by identifier can be seen below:

EILRequestFetchLocation *request = [[EILRequestFetchLocation alloc] initWithLocationIdentifier:yourLocationIdentifier];
[request sendRequestWithCompletion:^(EILLocation *location, NSError *error) {

if (!error)
{
self.myLocation = location;
}
}];

Please note that in order to have these methods working you need to be authenticated in Estimote Cloud. To do that you have to call -[ESTConfig setupAppID:andAppToken:] first.

#import "EILIndoorLocationManager.h"
#import "ESTConfig.h"

[ESTConfig setupAppID:@"yourAppID" andAppToken:@"yourAppToken"];

You can find your API App ID and API App Token in the Apps section of the Estimote Cloud.

You can check the authorization status using the following method that will return a BOOL value:

[ESTConfig isAuthorized]

Changelog

To see what has changed in recent versions of Estimote Indoor Location SDK, see the CHANGELOG.