ecoPrinter is an innovative device which can replace hard copies with no interaction file transferring, by implementing Android Beam and USB Printer Gadget functionality on a Raspberry PI Zero W.
Forget searching for Bluetooth devices or Wifi networks, enabling visibility, establishing a connection/pairing or setting up Wifi Direct, everything has become automated using (the unfortunately now deprecated) Android Beam. You just place your mobile device on the ecoPrinter while this is searching for a device (Red indication Light) and a few seconds later you can view the file on your mobile device as PDF. No matter if it is an image, document or a web-page, full backward compatibility is guaranteed because ecoPrinter appears as any other Printing device on your computer.
The main idea for this device is to reduce the amount of paper we use and also help users organize and keep their receipts, invoices, documents with the minimum amount of effort.