RPi-LED-Matrix

RPi-LED-Matrix is a project at the HS Mainz to display messages from different sources on a 8x8 LED Matrix.

Components

Database

• Stores the messages
  • Text
  • Author
  • Scrollspeed
• Flags messages that are already shown
• Maps Messages to Providers

daemon.py

• Runs as daemon
• Connects to the LED Matrix via SPI by using the luma.led_matrix framework
• Grabs messages from the database, formats and displays them
• 2s pause to preserve the databse

cron_telegram.py

• Triggerd by Cronjob (every minute)
• Connects to the Telegram Bot API (REST)
• Grabs the messages
• Inserts them into the Database

cron_twitter.py

• Triggerd by Cronjob (every minute)
• Connects to the Twitter API using the python-twitter framework
• Grabs mentions and tweets of specific accounts
• Inserts them into the Database
• Likes and retweets them

Requirements

Twitter API

• Create twitter app via apps.twitter.com
• Insert app details to the configuration file

Telegram API

• Create a bot via Botfather
• Insert the bot-token to the configuration file

Python

• Python 2.7
• pip install python-twitter
• pip install luma.core luma.led_matrix
  • HowTo install the framework

Cronjobs

@reboot         screen -AmdS LED-Daemon /opt/led/start.sh
* * * * *       cd /opt/led/; /usr/bin/python2.7 cron_telegram.py
* * * * *       cd /opt/led/; /usr/bin/python2.7 cron_twitter.py