The image above is for illustrating our example scenario. In a large-scale deployments such as academic campuses, multi-facility corporations, etc, multiple IAdea devices are often deployed in throughout each facility, each with different purposes, content, and users. There could be signboards running room management software for meeting room management and media players broadcasting visitor information or queue statuses. In an event of emergencies like natural disasters, fires, chemical leaks, or lockdowns, this emergency alert system can take charge of all signboards and media players and broadcast emergency information throughout the facility. When the authorities disables the alarm, the emergency alert system will release all devices and return to playing their original content.
This emergency alert system can be triggered using a physical button and also be used to trigger emergency lights!
Use REST API to switch between apps
IAdea provide REST API to switch the playing content. You can switch device to play an app, a web page, a video, a image or a SMIL file via REST-API.
Use app/start to set target content and use app/switch to play it.
For example, you may have a table below.
The devices are playing their default content. Two devices are playing meeting room app and the others is of a web page. When the trigger has been initiated, all devices will switch to play the emergency alert web page.
For more information about REST API, find REST API tutorial.
Using a physical button to trigger emergency alert system
For HTML5 application, you can follow this introduction. How to trigger a content by pressing a button?
Fro SMIL, you can reference the SMIL sample. http://www.a-smil.org/index.php/Interactivity
Using a physical button to trigger external emergency light
You can follow this introduction to control an external light.