chotee / ledslie

A community information display

Ledslie

A community information display. Ledslie is designed to be open and accessible to all that want to display information to a shared space.

• The Project page is https://wiki.techinc.nl/index.php/Ledslie
• Code is kept at https://github.com/techinc/ledslie

Components

Ledslie is based around the MQTT broker framework.

It consists of various processes that do one particular job.

• Site is a website based on Flask that users can interact with directly
• Serializer receives raw frame-types and sends them to the display.
• Sequencer maintains a queue of frames and sends the next to Serializer.
• Typesetter takes a text and generates the frame to be displayed.

Ledslie has various dependencies on other projects.

• Mosquitto is the MQTT broker.
• Nginx does the webserver work.
• Ansible does the Deployment from the deploy directory.
• Pillow is used for image processing.

Bonus tracks:

• Spacestate maintains the 'spacestate' MQTT topic with the current spacestate

Deploying

To test, use vagrant to run a VM that has all the system running (except, likely, the display)

$ cd deploy; vagrant up

To update the vagrant once installed

$ cd deploy; vagrant provision

To deploy to the machine (only works when in the space)

$ cd deploy; ansible-playbook -i techinc ledslie-install.yml

For a faster deploy when only existing programs are being updated there's

--tags update

Testing

There are unittests in tests. The test runner is pytest

Bugs

• /ledslie/text doesn't work. errors in log.
• animated gifs give errors in log