Building a Mobile Location Aware System with Beacons
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Audio from talk (OSCON - July 22nd, 2015): https://archive.org/details/oscon_mobile_location_aware_systems_with_beacons What if instead of a broad location, you could have pinpoint location awareness of someone in a physical space. How could this change everything about how we interact with the physical world? In this session we will be exploring Beacon technology, which enables this, the underlying Bluetooth Smart standard, and how we can use these systems to change everything from shopping, to accessibility for the disabled, all built on top of a mobile device.
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Building a Mobile Location Aware System with Beacons
- 1. Building a Mobile Location Aware System with Beacons Jonathan LeBlanc (@jcleblanc) Head of Global Developer Advocacy at PayPal + Braintree
- 2. twitter: @jcleblanc | hashtag: #OSCON Purpose of a Beacon
- 3. Being Location Aware twitter: @jcleblanc | hashtag: #OSCON
- 4. Real World Use Case twitter: @jcleblanc | hashtag: #OSCON
- 5. Central Device Beacon Hardware IP Address Endpoint How it Works twitter: @jcleblanc | hashtag: #OSCON
- 6. twitter: @jcleblanc | hashtag: #OSCON Estimote: $99 / 3, temp + motion Beacon Comparison Bluecat: Trial, AA batteries Gimbal Tag: $5, small & deployable Kontakt.io: $81 / 3, battery life
- 7. • UUID (16 bytes): Differentiates Large Group • Major (2 bytes): Beacon Subset • Minor (2 bytes): Individual Beacon • Tx Power: Proximity from beacon Beacon Advertisement & ID twitter: @jcleblanc | hashtag: #OSCON
- 8. twitter: @jcleblanc | hashtag: #OSCON Don’t be Creepy
- 9. twitter: @jcleblanc | hashtag: #OSCON Deploy Considerations
- 10. Battery Life vs Range twitter: @jcleblanc | hashtag: #OSCON
- 11. Battery Replacement twitter: @jcleblanc | hashtag: #OSCON
- 12. Signal Interference twitter: @jcleblanc | hashtag: #OSCON
- 13. • Microwave ovens • Direct Satellite Service (DSS) • Certain external electrical sources • 2.4 GHz or 5 GHz phones • Video transmitters/receivers that operate in the 2.4 GHz or 5 GHz bandwidth • Wireless speakers that operate in the 2.4 GHz or 5 GHz band • Certain external monitors and LCD displays • Any other wireless devices that operate in the 2.4 GHz or 5 GHz bandwidth twitter: @jcleblanc | hashtag: #OSCON
- 14. Signal Degradation twitter: @jcleblanc | hashtag: #OSCON
- 15. Low Interference Medium Interference High Interference Very High Interference Wood Synthetic Material Glass Water Bricks Marble Plaster Concrete Bulletproof Glass Metal
- 16. twitter: @jcleblanc | hashtag: #OSCON Attaching to a Beacon
- 17. <uses-permission android:name= "android.permission.BLUETOOTH"/> <uses-permission android:name= "android.permission.BLUETOOTH_ADMIN"/> <service android:name= ”com.estimote.sdk.service.BeaconService" android:exported="false"/> AndroidManifest.xml twitter: @jcleblanc | hashtag: #OSCON
- 18. Adjusting Beacon Settings Estimote Site and App twitter: @jcleblanc | hashtag: #OSCON
- 20. connection = new BeaconConnection(this, beacon, new BeaconConnection.ConnectionCallback(){ @Override public void onAuthenticated(){ ... } @Override public void onAuthenticationError(){ ... } @Override public void onDisconnected(){ ... } }); connection.authenticate(); connection.close(); The Beacon Connection twitter: @jcleblanc | hashtag: #OSCON
- 21. //update the beacon UUID and Major connection.edit() .set(connection.major(), newMajor) .commit(new BeaconConnection.WriteCallback(){ @Override public void onSuccess(){} @Override public void onError(EstimoteDeviceException exception){} }); Adjusting Beacon Settings twitter: @jcleblanc | hashtag: #OSCON
- 22. • AdvertisingInterval • BroadcastingPower • Major • Minor • ProximityUuid Updatable Settings twitter: @jcleblanc | hashtag: #OSCON
- 23. The Android Emulator twitter: @jcleblanc | hashtag: #OSCON
- 24. twitter: @jcleblanc | hashtag: #OSCON Virtual Machine Software + USB BLE adapter http://chrislarson.me/blog/ emulate-android-and-bluetooth- le-hardware.html Emulating Android & BLE
- 25. twitter: @jcleblanc | hashtag: #OSCON Collecting Range Data
- 26. • getProximityUUID: Proximity UUID of the Beacon • getMajor: Major version of the beacon • getMinor: Minor version of the beacon • getMeasuredPower: Beacon measured power (in dBm) • getMacAddress: Beacon MAC address • getName: Display friendly beacon name • getRssi: Received Signal Strength Indication The Beacon Object twitter: @jcleblanc | hashtag: #OSCON
- 27. private static final Region ALL_BEACONS = new Region("regionId", null, null, null); private BeaconManager beaconManager = new BeaconManager(this); Setting the Beacon Manager twitter: @jcleblanc | hashtag: #OSCON
- 28. beaconManager.setRangingListener(new BeaconManager.RangingListener() { @Override public void onBeaconsDiscovered(Region region, List<Beacon> beacons) { for (Beacon rangedBeacon : beacons) { double currentDistance = Utils.computeAccuracy(rangedBeacon); … } } }); Setting the Listener twitter: @jcleblanc | hashtag: #OSCON
- 29. beaconManager.connect( new BeaconManager.ServiceReadyCallback(){ @Override public void onServiceReady(){ try{ beaconManager.startRanging(ALL_BEACONS); } catch (RemoteException e) { Log.e(TAG, "Cannot start ranging", e); } } }); Getting Beacon Range twitter: @jcleblanc | hashtag: #OSCON
- 30. iBeacon Specification https://developer.apple.com/ibeacon/ Estimote Javadocs http://estimote.github.io/Android- SDK/JavaDocs/ AltBeacon http://altbeacon.org/examples/ twitter: @jcleblanc | hashtag: #OSCON
- 31. Beacon Wrap-up twitter: @jcleblanc | hashtag: #OSCON
- 32. Thank You! http://slideshare.net/jcleblanc Jonathan LeBlanc (@jcleblanc) Head of Global Developer Advocacy at PayPal + Braintree
Editor's Notes
- Connection Type: Intermittant Battery Life: ~ 1.5 years (ha) Range: ~ 75-100 meters Data Latency: 3ms
- UUID: 16 byte string used to differentiate a large group of related beacons Major: 2 byte string used to distinguish a smaller subset of beacons within the larger group Minor: 2 byte string meant to identify individual beacons Tx Power: determine proximity (distance) from the beacon
- Use multiple beacons and average the results
- Sources of interference Microwave ovens: Using your microwave oven near your computer, Bluetooth device, or Wi-Fi base station may cause interference. Direct Satellite Service (DSS): The coax cable and connectors used with certain types of satellite dishes may cause interference. Check the cable for damage and obtain newer cables if you suspect RF leakage issues. Certain external electrical sources such as power lines, electrical railroad tracks, and power stations. 2.4 GHz or 5 GHz phones: A cordless telephone that operates in this range may cause interference with wireless devices or networks when used. Video senders (transmitters/receivers) that operate in the 2.4 GHz or 5 GHz bandwidth. Wireless speakers that operate in the 2.4 GHz or 5 GHz band. Certain external monitors and LCD displays: Certain displays may emit harmonic interference, especially in the 2.4GHz band between channels 11 and 14. This interference may be at its worst if you have a portable computer with the lid closed and an external monitor connected to it. Try changing your access point to use 5 Ghz or a lower 2.4 GHz channel. Any other wireless devices that operate in the 2.4 GHz or 5 GHz bandwidth (microwaves, cameras, baby monitors, neighbors' wireless devices, and so on).
- Things that create signal degradation – 3 levels of signal degredation https://support.apple.com/en-us/HT201542 Low Wood Synthetic material Glass Medium Water Bricks Marble High Plaster Concrete Bulletproof glass Very High Metal
- Adjusting the settings on your beacons through the estimote website (or like beacon settings)
- connection.writeMinor(minor, new BeaconConnection.WriteCallback() { @Override public void onSuccess() { … } @Override public void onError() { … } });
- connection.writeMinor(minor, new BeaconConnection.WriteCallback() { @Override public void onSuccess() { … } @Override public void onError() { … } });
- Have to use a physical device instead of the emulator http://stackoverflow.com/questions/20348743/bluetooth-low-energy-on-android-emulator Can work via virtualbox http://chrislarson.me/blog/emulate-android-and-bluetooth-le-hardware.html
- Region("regionId", UUID, major, minor); BeaconManager(context);
- beaconManager.connect invoked in #onstart
- http://blog.shinetech.com/2014/02/17/the-beacon-experiments-low-energy-bluetooth-devices-in-action/