Features

  • ATmega32U4 (Same as the Arduino Leonardo)
  • USB transceiver
  • DS1343 Real-Time Clock
  • 128KB FRAM
  • LiR2016 Coin-cell Li-Ion battery
  • Battery charging over USB
  • 2.7" e-Paper display
  • 5 edge-mounted interrupt-triggered tactile buttons

Dimensions

80 mm x 45 mm x 5 mm

Applications

  • Google Auth Time-OTP
  • Store barcodes for rewards cards, etc.
  • Store QR codes
  • USB text terminal for a Raspberry Pi

System Design Schematic