Difference between revisions of "Ledslie"
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{{Project | {{Project | ||
| − | |ProjectSkills=electronics, microcontrollers, linux, mqtt, webservices | + | |picture=23c6c9d3ff88b3f8-cut.jpg |
| + | |ProjectSkills=electronics, microcontrollers, linux, mqtt, webservices, python, twisted, ansible | ||
|ProjectStatus=Active | |ProjectStatus=Active | ||
|ProjectNiche=Electronics | |ProjectNiche=Electronics | ||
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* It is a Grayscale display of 144x24 pixels that displays information. | * It is a Grayscale display of 144x24 pixels that displays information. | ||
| − | * It lives at http://ledslie.ti/ and is accessible at the space via a website and | + | * It lives at http://ledslie.ti/ and is accessible at the space via a website and MQTT. |
= Interfaces = | = Interfaces = | ||
| Line 14: | Line 15: | ||
* You can publish content by posting content to the web-service. | * You can publish content by posting content to the web-service. | ||
* You can publish content directly to the mqtt broker that lives on ledslie.ti:1883. | * You can publish content directly to the mqtt broker that lives on ledslie.ti:1883. | ||
| + | |||
| + | = Known issues (and their solution) = | ||
| + | * Symptoms: The screens network dependent screens are missing, time might be incorrect. http://ledslie.ti is not available. | ||
| + | * Problem: The DHCP server was not available when Ledslie started up, and is now in network-less mode. Likely there was a space power failure. | ||
| + | * Solution: Once the network is stable again, cycle the power of Ledslie, it should restart properly. | ||
= Content ideas (in no specific order) = | = Content ideas (in no specific order) = | ||
| − | * Spacealert with message. | + | * (Done-ish) Spacealert with message. Still missing working shardik code. |
* IRC integration via shardik: .display [message] | * IRC integration via shardik: .display [message] | ||
| − | * | + | * (Done) MPD songs: What are we listening to? |
| − | * Wifi SSIDs being broadcast | + | * Wifi SSIDs being broadcast / MAC count stats |
| − | * | + | ** https://arstechnica.com/information-technology/2014/11/where-have-you-been-your-smartphones-wi-fi-is-telling-everyone/ |
| − | * Done | + | ** https://www.hak5.org/episodes/haktip-23 |
| − | * | + | * (Done) Next and tram / metro / nightbuses |
| − | * Drama stats | + | * (Done) Incoming rain alerts (https://www.buienradar.nl/overbuienradar/gratis-weerdata, https://br-gpsgadget-new.azurewebsites.net/data/raintext/?lat=52.35&lon=4.83) |
| + | * (Done) Clock | ||
| + | * (Done) Midnights ("Midnight in «City»") | ||
| + | * Days until Brexit | ||
| + | * Drama stats | ||
| + | ** Parse the ML archives, get stats from there --- https://techinc.nl/cgi-bin/mailman/listinfo/ + https://techinc.nl/cgi-bin/mailman/listinfo/discuss | ||
| + | ** Keep track of IRC stats --- https://gist.github.com/habnabit/5823693 | ||
* API/Interface for countdowns. | * API/Interface for countdowns. | ||
| − | * | + | * (Done) Next TI events |
| − | * | + | * Space events |
** Next interesting rocket launch (SpaceX, Soyuz, etc...) | ** Next interesting rocket launch (SpaceX, Soyuz, etc...) | ||
| − | |||
** ISS flyovers | ** ISS flyovers | ||
| − | * | + | * (Done) Zonsopkomst en -ondergang tijden |
| − | * | + | * (Done) Maan standen. volle maan, nieuwe, etc. |
| − | |||
* External content | * External content | ||
| + | ** (Done) Btc/Eth values --- https://www.cryptocompare.com/ | ||
| + | ** https://radar.squat.net --- https://0xacab.org/radar/drupal-make/wikis/api/1.1/notes | ||
** Security.nl | ** Security.nl | ||
| + | ** http://www.apiblog.nl/ | ||
** Theregister.co.uk | ** Theregister.co.uk | ||
** hackernews. | ** hackernews. | ||
** Radio Yerevan Jokes: https://duckduckgo.com/Radio_Yerevan_jokes?iax=1&ia=about | ** Radio Yerevan Jokes: https://duckduckgo.com/Radio_Yerevan_jokes?iax=1&ia=about | ||
| − | ** Jargon file | + | ** Random Jargon file entries |
| − | |||
= How it works = | = How it works = | ||
| Line 50: | Line 62: | ||
The Ledslie code can be found here: https://github.com/techinc/ledslie | The Ledslie code can be found here: https://github.com/techinc/ledslie | ||
| + | |||
| + | = Software = | ||
| + | |||
| + | The system's software is available at https://github.com/techinc/ledslie , this repo contains code that's running on the Display. | ||
= Possible Hardware expansions = | = Possible Hardware expansions = | ||
Latest revision as of 16:17, 9 April 2018
| Projects | |
|---|---|
| |
| Participants | Chotee, Thijs |
| Skills | electronics, microcontrollers, linux, mqtt, webservices, python, twisted, ansible |
| Status | Active |
| Niche | Electronics |
| Purpose | Infrastructure |
Contents
Interface to display information
- It is a Grayscale display of 144x24 pixels that displays information.
- It lives at http://ledslie.ti/ and is accessible at the space via a website and MQTT.
Interfaces
- At http://ledslie.ti/ you to submit content, such as animated GIFs, from your browser.
- You can publish content by posting content to the web-service.
- You can publish content directly to the mqtt broker that lives on ledslie.ti:1883.
Known issues (and their solution)
- Symptoms: The screens network dependent screens are missing, time might be incorrect. http://ledslie.ti is not available.
- Problem: The DHCP server was not available when Ledslie started up, and is now in network-less mode. Likely there was a space power failure.
- Solution: Once the network is stable again, cycle the power of Ledslie, it should restart properly.
Content ideas (in no specific order)
- (Done-ish) Spacealert with message. Still missing working shardik code.
- IRC integration via shardik: .display [message]
- (Done) MPD songs: What are we listening to?
- Wifi SSIDs being broadcast / MAC count stats
- (Done) Next and tram / metro / nightbuses
- (Done) Incoming rain alerts (https://www.buienradar.nl/overbuienradar/gratis-weerdata, https://br-gpsgadget-new.azurewebsites.net/data/raintext/?lat=52.35&lon=4.83)
- (Done) Clock
- (Done) Midnights ("Midnight in «City»")
- Days until Brexit
- Drama stats
- Parse the ML archives, get stats from there --- https://techinc.nl/cgi-bin/mailman/listinfo/ + https://techinc.nl/cgi-bin/mailman/listinfo/discuss
- Keep track of IRC stats --- https://gist.github.com/habnabit/5823693
- API/Interface for countdowns.
- (Done) Next TI events
- Space events
- Next interesting rocket launch (SpaceX, Soyuz, etc...)
- ISS flyovers
- (Done) Zonsopkomst en -ondergang tijden
- (Done) Maan standen. volle maan, nieuwe, etc.
- External content
- (Done) Btc/Eth values --- https://www.cryptocompare.com/
- https://radar.squat.net --- https://0xacab.org/radar/drupal-make/wikis/api/1.1/notes
- Security.nl
- http://www.apiblog.nl/
- Theregister.co.uk
- hackernews.
- Radio Yerevan Jokes: https://duckduckgo.com/Radio_Yerevan_jokes?iax=1&ia=about
- Random Jargon file entries
How it works
Wifi --RF> Getchip --USB2> Teensy --[data,clock,latch]> Led-pannel
The led-panel takes 20V DC as input. At full output it's pulling about 4A, or about 80W. There's a small switcher-board that supplies the 5v the the getchip and Teensy from those 20V.
The Teensy drive code is here: https://github.com/techinc/ledmatrix/tree/master/ledmatrix144x24
The Ledslie code can be found here: https://github.com/techinc/ledslie
Software
The system's software is available at https://github.com/techinc/ledslie , this repo contains code that's running on the Display.
Possible Hardware expansions
- Add another panel by adding a USB2 hub, and modding another of the led panels with the teensy taking over the driving logic.
FAQ
- Q: What's that noise? A: The panel is being driven at rates way beyond the original design and we're well in the audible frequencies with the refresh-rates and some components are merrily humming along.
- Q: Why are some points brighter then others? A: Turns out that LEDs do wear. In their previous life some LEDs were on for years, while others were always off. There's plans to compensate for this in software.
