CSN-A2 Micro panel printer
- http://www.adafruit.com/datasheets/cashino%20thermal%20printer%20a2.pdf
- http://www.adafruit.com/datasheets/CSN-A2%20User%20Manual.pdf
- https://github.com/adafruit/Adafruit-Thermal-Printer-Library
- https://github.com/adafruit/Python-Thermal-Printer
- https://learn.adafruit.com/pi-thermal-printer/overview