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Papyr: Open Hardware nRF52840 ePaper Display

By on May 18, 2019
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Papyr is a Nordic nRF52840 epaper display that can be used for various low power wireless applications. It combines two core ideas: a low power wireless technology combined with a low power display system. By choosing the Nordic nRF52840 SoC, Papyr is able to support not only BLE but mesh networking protocols like Thread, BLE Mesh, and Zigbee. It can be controlled via an Android app, with iOS support coming later on.

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The company also offers a case, a user kit adding a CR2477 battery and laser-cut case, and a developer kit. The board runs Zephyr Project with the default firmware source code, and some hardware files available on Gitlab.

Papyr hardware specifications:

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  • Wireless Module – Raytac MDBT50 module with Nordic nRF52840 BLE/802.15.4 SoC
  • Connectivity – Bluetooth 5 LE/Mesh, 802.15.4 (Thread/Zigbee), NFC (PCB antenna)
  • Display – 1.54″ 200×200 pixel red/black/white epaper display
  • USB – 1x micro USB device port
  • Expansion – Extra GPIOs via 2.54mm header
  • Debugging – SWD Programming header
  • Misc – RGB LED, push button, USB/Battery power switch
  • Power Supply – 5V via USB, or CR2477 coin cell
  • Dimensions – 65 x 35 mm

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