Getting Physical with Web Bluetooth in the Browser Full Stack Toronto
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How to get started with the Physical Web and Web Bluetooth
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Getting Physical with Web Bluetooth in the Browser Full Stack Toronto
- 1. Getting Physical with Web Bluetooth in the browser Dan Jenkins @dan_jenkins
- 3. @dan_jenkins Wouldn't it be cool to interact with real life using JavaScript In the Browser?
- 5. @dan_jenkins And being able to use it. With the Web.
- 6. @dan_jenkins Drones, BB8, Fitbits, Adult toys... Bluetooth Low Energy
- 7. @dan_jenkins Let's take a step back
- 8. @dan_jenkins What is this magic?
- 12. @dan_jenkins Ever wished you could "click" on things in real life and find out more about them?
- 15. @dan_jenkins But there are many other places where we want to interact with something around us
- 17. @dan_jenkins
- 18. @dan_jenkins
- 19. @dan_jenkins How do I use this magic?
- 22. @dan_jenkins Android iOS • Location & Bluetooth turned on • Android "Nearby" enabled (default) https://android.googleblog.com/2016/06/introducing-nearby-new-way-to-discover.html • Bluetooth turned on • Chrome Notifications enabled (Allow the Chrome widget in Notification Center) https://docs.pushmote.com/docs/how-to-enable-chromes-physical-web-extension-on-the-ios
- 23. @dan_jenkins Android caveat They've just rolled back to Chrome doing the Physical Web notifications in latest Chrome for Android https://goo.gl/MrAXUw https://goo.gl/PMwBY2
- 24. @dan_jenkins Android caveat But that'll only be for 6 or so weeks...
- 25. @dan_jenkins
- 29. @dan_jenkins Anything that can emit using Bluetooth Low Energy
- 30. @dan_jenkins What makes up the Physical Web?
- 31. @dan_jenkins Eddystone • Open Message Format • Eddystone URLs have 18 bytes worth of data that can be broadcast • https://developers.google.com/beacons/eddystone
- 32. @dan_jenkins Chrome• Chrome on iOS and Nearby on Android scans for BLE beacons with Eddystone URLs • Chrome only supports HTTPS URLs • Chrome then sends those URLs up to Google's Proxy service (does some extra magic) • The Proxy service then sends those URLs back to Chrome • Chrome/Nearby shows a notification All of this doesn't work unless you have data & location turned on
- 33. @dan_jenkins
- 34. @dan_jenkins And they're being used today
- 37. @dan_jenkins And there are beacons here today
- 38. @dan_jenkins And you don't have to use Chrome to get them https://www.phy.net/physical-web-browsers/
- 39. @dan_jenkins That's great for linking the Physical World to your Phone
- 42. @dan_jenkins Your browser can connect to Bluetooth Low Energy (BLE) devices directly
- 43. @dan_jenkins Using JavaScript, we can now connect to physical devices using BLE and control them
- 44. @dan_jenkins
- 45. @dan_jenkins BLE (not just toys) 45
- 46. @dan_jenkins BLE (not just toys) 46
- 47. @dan_jenkins BLE (okay... a fair few toys) 47
- 48. @dan_jenkins Stepping back, what is BLE? • Low Bandwidth • Bluetooth v4 - Bluetooth Low Energy (0.3 Mbps) • Bluetooth v3 (54 Mbps) • A set of Standard Services • But you can also build your own services
- 49. @dan_jenkins BLE GATT Server Gatt Server Custom ServiceBattery Service Battery Level Characteristic Custom Characteristic #1 Custom Characteristic #1
- 50. @dan_jenkins Let's take a look at the Web Bluetooth API
- 51. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 52. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 53. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 54. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 55. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 56. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 57. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', boop); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function boop(event) { console.log(event.target.value); }
- 58. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 59. @dan_jenkins var options = { filters: [{ services: ['heart_rate'] }] }; navigator.bluetooth.requestDevice(options) .then(device => device.gatt.connect()) .then(server => server.getPrimaryService('heart_rate')) .then(service => service.getCharacteristic('heart_rate_measurement')) .then(characteristic => { characteristic.addEventListener('characteristicvaluechanged', beep); return characteristic.startNotifications(); }) .catch(error => { console.log(error); }); function beep(event) { console.log(event.target.value); }
- 60. @dan_jenkins But what if the device was broadcasting a URL where it can be controlled from?
- 61. @dan_jenkins
- 62. @dan_jenkins Today, there's no way to bypass that device selection Which kinda sucks
- 63. @dan_jenkins But that's changing soon too var referringDevice = navigator.bluetooth.referringDevice; if (referringDevice) { referringDevice.gatt.connect() .then(server => { ... }) .catch(error => { console.log(error); }); }
- 64. @dan_jenkins But that's changing soon too var referringDevice = navigator.bluetooth.referringDevice; if (referringDevice) { referringDevice.gatt.connect() .then(server => { ... }) .catch(error => { console.log(error); }); }
- 65. @dan_jenkins Where can I play with Web Bluetooth today? In short.... Chrome/Chromium on... Android M & N ChromeOS Linux Android L with Chromium OSX (Chrome 53) Windows (a little)
- 66. @dan_jenkins But for more info... https://goo.gl/rDu2UT
- 67. @dan_jenkins And you have to enable it... chrome://flags
- 68. @dan_jenkins But there is a Google Chrome Origin Trial ongoing https://goo.gl/hzczDR
- 69. @dan_jenkins And the Chrome team has announced their intent to ship in 56 https://goo.gl/KMmjda
- 70. @dan_jenkins Oh and only on Localhost & HTTPS... There are quite a few hoops!
- 71. @dan_jenkins Loads of demos out there https://webbluetoothcg.github.io/demos/
- 72. @dan_jenkins And you can make your own peripherals BBC micro:bit Arduino Tessel Raspberry Pi 3
- 73. @dan_jenkins Developing for Web Bluetooth has become easier, for sure; eh.
- 74. @dan_jenkins Unless you're developing on Windows... but that's changing too
- 75. @dan_jenkins Hardware with BLE is cheap
- 76. @dan_jenkins Your dev environment just needs to have BLE (Bluetooth 4)
- 79. @dan_jenkins There are less and less reasons to build native apps
- 80. @dan_jenkins goo.gl/7uAtkY 3 great Google I/O videos about the Physical Web and Web Bluetooth