Betabeers Android as a Digital Signage platform
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Android can be used as a digital signage platform. It provides features like a content player using Cordova and JavaScript, a scheduler to manage content and device state, and restricted user access to prevent tampering. The platform includes tools for remote management like uploading content, screenshots, and monitoring device statistics. It aims to provide an easy and low-cost digital signage solution.
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Betabeers Android as a Digital Signage platform
- 1. Android as a Digital Signage platform Betabeers Barcelona November 2013
- 2. Hello world The company Clients 20 people Orange Digital Signage El Corte Inglés User Interactivity Endesa Sodexo Projects Spain United Kingdom Germany Netherlands Finland www.focusonemotions.com @focusonemotions Ikea Nespresso Fira Barcelona Ajuntament de Barcelona ESADE The Phone House
- 3. Hello world Orestes Carracedo 8 years as a developer 4 years as an Android user 3,5 years at Focus On Emotions Software Development Director Certified SCRUM Master PHP 5.3 Zend Certified Engineer Read about me http://blog.orestes.io Follow me @orestesCA
- 9. Briefing Make it on time Code as less as possible Be robust Make use of existing OS tools Make use of existing apps Be flexible Create multiple decoupled tools that work together
- 10. System architecture Apache Cordova A D B API Client JavaScript player V P N cron scheduler SuperSU BusyBox HTTP API S S H CLI API
- 12. Let’s do it!
- 13. Quick ADB recap $ adb devices List of devices attached 4df144cb39376f2f device # Over USB 192.168.1.42:5555 device # Over NET $ adb shell echo “Hello world” Hello world $ adb -d shell ls /mnt/sdcard $ adb -s 192.168.1.42:5555 shell ls /mnt/sdcard Enable ADB over Wi-Fi $ adb shell setprop service.adb.tcp.port 5555 $ adb shell stop adbd && start adbd # or you’ll be locked out $ adb connect 192.168.1.42:5555
- 14. Quick ADB recap Sending keys $ adb shell input keyevent 3 # home Starting activities $ adb shell am start -n com.focusonemotions.android.player./Wrapper Killing a process $ pm stop com.focusonemotions.android.player Installing apps $ adb install foe-player-v1.1.apk $ adb push foe-player-v1.1.apk /system/app Android Monitor <android-sdk>/tools/monitor http://developer.android.com/reference/android/view/KeyEvent.html
- 15. Features
- 16. Player Cordova Rotates screen Shows WebView Provides OS shell access JavaScript Displays content Reads content index file Listens for gesture Asks for security code Shows config manager
- 17. Scheduler Power management $ reboot # (duh) Screen state management $ input keyevent 26 # power $ input keyevent 82 # menu Player state management $ killall com.focusonemotions.android.player $ am start -n com.[...].player/.Wrapper http://developer.android.com/reference/android/view/KeyEvent.html
- 18. Restricted user access ● Kill UI process ● Custom launcher AndroidManifest <category android:name="android.intent.category.HOME" /> /system/build.prop qemu.hw.mainkeys=1 ● Custom ROM http://thebitplague.wordpress.com/2013/04/05/kiosk-mode-on-the-nexus-7/
- 19. Local configuration manager Content Index file Configuration manager Player configuration file Content player
- 20. Static IP address $ openvpn --config /mnt/sdcard/focus/openvpn/conn.conf > /mnt/sdcard/focus/openvpn/run.log & $ cat /mnt/sdcard/focus/openvpn/conn.conf | grep resolv resolv-retry infinite https://play.google.com/store/apps/details?id=de.schaeuffelhut.android.openvpn.installer https://play.google.com/store/apps/details?id=de.blinkt.openvpn
- 21. Remote shell $ adb connect 192.168.1.42:5555 . . $ time adb connect 192.168.1.42:5555 unable to connect to 192.168.1.42:5555 real user sys 1m3.163s 0m0.000s 0m0.020s $ time timeout 9s adb connect 192.168.1.42 real user sys 0m9.003s 0m0.000s 0m0.020s
- 22. Screen capture $ adb shell screencap /mnt/sdcard/focus/capture.png $ adb pull /mnt/sdcard/focus/capture.png $ ./capture.sh oratab-030-01 Getting screencap from oratab-030-01 ... done.
- 23. Wi-Fi management $ echo "12345678" | wpa_passphrase "SSID" # reading passphrase from stdin network={ ssid="SSID" #psk="12345678" psk=34b59e6b0182725d42460 [...] } $ wpa_passphrase "SSID" "12345678" # may malfunction $ wpa_passphrase "SSID" # may malfunction # reading passphrase from stdin Android Wi-fi/WPA settings /data/misc/wifi/wpa_supplicant.conf
- 24. Content management $ adb push /local/folder /remote/folder PHP SFTP Wrapper /mnt/sdcard/focus + openvpn + player $ php load-device-content.php 300 7 + scheduler Loading content … + upload 50 % 20/40 KB 100 % 40/40 KB Done. - content - october_2013 + media
- 26. Statistics & graphs Whisper database (updates to past data) Carbon aggregation (Use an IP, not a hostname UDP is better than TCP, is off by default) Graphite for rendering $ /opt/graphite/bin/carbon-cache.py start --debug $ echo ‘value.received’ `date +%s` | nc -w 1 127.0.0.1 2003 StatsD/statsite as aggregator/proxy (v8 nodejs vs C) <?php StatsD::increment(‘com.focusonemotions.app.pushing’); http://graphite.readthedocs.org/en/latest/ https://github.com/etsy/statsd/ https://github.com/armon/statsite
- 27. Platforming
- 28. Platforming 1. 2. 3. 4. 5. Plug device in Enable ADB over USB Launch script Enter ID Done! Check ● ● ● ● PING SFTP SSH ADB
- 29. Platforming Install SuperSU + settings Install BusyBox Install DropBearSSH Fix SFTP subsystem Install player Install scheduler Install OpenVPN certificates from ID Reboot $ sftp root@192.168.1.42:mnt/sdcard/focus bash: /usr/libexec/sftp-server: No such file or directory $ sftp -s /system/xbin/sftp-server root@192.168.1.42:mnt/sdcard/focus sftp> # quick fix [adb] $ ln -s /system/xbin/sftp-server /usr/libexec/sftp-server http://www.chainfire.eu/projects/52/SuperSU/ https://play.google.com/store/apps/details?id=stericson.busybox https://github.com/yath/android_external_dropbear
- 34. Testing
- 35. Testing Quick feedback Acceptance Tests ● CLI API ● Web API Physical testing devices
- 36. Testing Scenario Outline: Get a list of cities based on the passed parameters Given I have an endpoint "http://api.pushmaster.focusonemotions.com/1.0/city/" And I pass an argument "id" "<id>" And I pass an argument "title" "<title>" When I make a "<method>" request to the endpoint Then I should get a valid response "<response>" Examples: | method | GET | GET | GET | GET | GET | id | title | | | 1 | | | Hobbiton | -1 | | | FOO | | | | | | response city/city-list.json city/city-get-by-id.json city/city-get-by-title.json null.json null.json | | | | | |
- 37. All done
- 38. Ha ha!
- 41. Monitoring with Nagios $ php check-device-content.php 192.168.1.42 Up-to-date $ php check-device-content.php 192.168.1.42 Out of date http://nagios.sourceforge.net/docs/3_0/quickstart.html
- 42. Monitoring with Nagios <?xml version="1.0" encoding="UTF-8"?> <nagios_status> <hosts> <host name="dev-001"> <status last_change="2013-10-08T16:27:37+02:00">0</status> <connectivity last_change="2013-10-08T16:27:37+02:00">0</connectivity> <content last_change="2013-10-08T16:27:37+02:00">0</content> <sftp last_change="2013-10-08T16:27:37+02:00">0</sftp> </host> [...]
- 43. Thank you! Feedback orestes.ca@gmail.com Team Project Manager Juanra Posada Lead Developer Orestes Carracedo Developers Javier Morales Dimas López http://www.focusonemotions.com JavaScript Ninja Raúl Jiménez System Administrators Javier Domingo dev@focusonemotions Gonzalo Rodríguez
- 44. Challenge Break out of the player app, win an Amazon gift card! ● ● ● ● Try to guess the unlock gesture Try to guess the unlock code No buttons No fastboot