SHA2017 is an outdoor Hacker camp taking place in The Netherlands in August 2017. Its organizers have just revealed the latest design for the con badge, which is designed to double as both a badge and a platform for hacking together new uses for a 2.4" E-ink screen.
The badge comes equipped with a d-pad and buttons inspired by the classic NES controller. In order to keep the design simple, the button are painted on with capacitive ink.
Hackaday has more detail:
The most immediately obvious thing about the badge is its 296×128 pixel e-ink display, which should provide an immediate benefit in terms of battery life. There are the usual plethora of interfaces, GPIOs, USB, and Neopixels, and the user input is via a set of capacitive buttons. Powering the device is an ESP32, and a key design goal was to have a network for the badges that does not put pressure on the 2.4GHz infrastructure. We’re guessing they’re doing this using raw WiFi packets in the same way as the MAGfest swadge. On the software front it will provide a straightforward development route via MicroPython, and there will be an app library for those without the inclination to code their own. You can get an early look at the schematic from the project repo (PDF).
you can find more info on the SHA2017 website.