quality. Even if the last one is relative to what we can expect for black or white thermal printing. I moved from the affordable and small serial Adafruit 58mm printer to a more professional one. After some non conclusive test with a cheap 80mm Chinese printer, I finally get an Epson point of sale printer. The TM-T20 is USB and commands are very well documented on their website. If not set to the maximum print speed, they could make surprisingly good prints for bitmap pictures. It depends a bit of the paper quality as well. I get very nice results with BPA-free recycled paper roll.
The software is written in Java and uses two external libraries. One for GPIO – Pi4J and an other one for USB – usb4Java . In addition, the native raspbian program raspividyuv is used to get the camera frames. The camera output is on top of everything and always visible on the screen. The all Java software part is hosted on github. The runnable Jar file must be launch on the Raspbian LXDE environment and could be easily auto-launched. There is some logs here, but I must complete them a bit.
In the view to avoid yet another device taking dust in the garage, I made the case looks like an arcade. I just have to exchange the front panel to have a raspberry pi Mame machine ! (That will instead probably take the dust of the attic, but with style, surrounded by retro consoles)
It was quite a success on the Juggling convention, it brought fun and few free beers ! It ran smoothly without any reboot despite I expected some bugs.
After being used on a week-end for around 500 prints, it will be used on a Hackathon in Geneva with a slightly different mode.