TV: Difference between revisions
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== Control through IRC == | == Control through IRC == | ||
Sauron has some functions that can be triggered through the IRC channel. They can be run by mentioning the name of the bot in the Leeds Hackspace channel, | Sauron has some functions that can be triggered through the IRC channel. They can be run in two ways: | ||
* by mentioning the name of the bot in the Leeds Hackspace channel | |||
* by sending a private message to the bot | |||
You can get the bot's attention by either mentioning its name, or prefixing your message with the "^" symbol. Commands are run by giving the command name and then the command arguments, e.g: | |||
* <code>Sauron-tv: bigtext This message will appear big on-screen</code> | |||
* <code>^bigtext This message will appear big on-screen</code> | |||
=== Commands === | === Commands === | ||
==== General ==== | ==== General ==== | ||
* bigtext - show a short message in big flashing text on screen for 10 seconds. | * <code>bigtext ''your message here''</code> - show a short message in big flashing text on screen for 10 seconds. | ||
==== Camera view control ==== | ==== Camera view control ==== | ||
Controls what camera is currently displayed on the screen. Current camera choices are ''carpark'', ''main1'' (camera by the soldering station), ''main2'' (camera on the arcade cab), ''door'' (the internal door), ''outside'' (the external door), and ''3dprinter''. | Controls what camera is currently displayed on the screen. Current camera choices are ''carpark'', ''main1'' (camera by the soldering station), ''main2'' (camera on the arcade cab), ''door'' (the internal door), ''outside'' (the external door), and ''3dprinter''. | ||
* cam fix ''camname'' - View the specified camera indefinitely. | * <code>cam fix ''camname''</code> - View the specified camera indefinitely. | ||
* cam resume - Resume rotating through cameras (Sauron starts up in this mode) | * <code>cam resume</code> - Resume rotating through cameras (Sauron starts up in this mode) | ||
* cam view ''camname'' - View the specified camera for 30 seconds, then resume rotating | * <code>cam view ''camname''</code> - View the specified camera for 30 seconds, then resume rotating | ||
=== Implementation === | === Implementation === | ||
Revision as of 23:02, 14 May 2016
A plasma screen is affixed to the wall. It displays status information about the space.
The Screen
It's a Hitachi 42PD5000. Native resolution is 1024x1024, but it does not accept digital input at this resolution, or any sane resolution. The screen itself is 16:9, but all the advertised EDID modes are 4:3. The manual suggests that it should be capable of more, but these are specific to which inputs are used (DVI accepts different resolutions to VGA).
After much experimentation, I (HEx) settled on 1024x768 over VGA, software scaled to 1366x768.
Hardware
Driving the screen is an Athlon 64 box named sauron (172.31.26.112). It runs debian jessie.
User "kiosk" is logged in on boot, running Chromium in kiosk mode.
Status page
The status page displays:
- General status from the API (open or closed, who's here, current temperature).
- Twitter feed
- Mailing list feed
- IRC (Sauron is a member of the channel using the nickname Sauron-tv)
- Camera feed
The code is stored on GitHub and is checked out locally to /srv/lhs-status on Sauron, which is then served by Apache.
Mailing list feed
The list of topics on the mailing list is served as an RSS feed by Google Groups, but due to CORS restrictions it cannot be accessed using an AJAX request directly from the status page. As a workaround, Apache is configured to reverse-proxy requests to topics.xml in the main lhs-status directory to the actual Google Groups RSS URL.
Control through IRC
Sauron has some functions that can be triggered through the IRC channel. They can be run in two ways:
- by mentioning the name of the bot in the Leeds Hackspace channel
- by sending a private message to the bot
You can get the bot's attention by either mentioning its name, or prefixing your message with the "^" symbol. Commands are run by giving the command name and then the command arguments, e.g:
Sauron-tv: bigtext This message will appear big on-screen^bigtext This message will appear big on-screen
Commands
General
bigtext your message here- show a short message in big flashing text on screen for 10 seconds.
Camera view control
Controls what camera is currently displayed on the screen. Current camera choices are carpark, main1 (camera by the soldering station), main2 (camera on the arcade cab), door (the internal door), outside (the external door), and 3dprinter.
cam fix camname- View the specified camera indefinitely.cam resume- Resume rotating through cameras (Sauron starts up in this mode)cam view camname- View the specified camera for 30 seconds, then resume rotating
Implementation
The IRC client embedded within the status page is a fork of the Shout Node JS-based web IRC client. The fork includes Hackspace-specific additions such as a theme that hides all UI elements apart from the main chat messages window, in addition to having several pull requests on the main Shout repository merged (automatically joining the channel on load, and adding a framework for client plugins).
The client runs as a node process (managed by supervisord), which listens for HTTP connections on port 3000. The status page then embeds the client in an iframe pointing at http://localhost:3000.