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WSAL17745 – 2.13inch NFC-Powered e-Paper/en

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Documentation notice: This technical documentation was independently rewritten from an archived supplier source. Check technical details and commands against the product version and manufacturer documentation before use.

Summary

The 2.13inch NFC-powered e-paper module is a passive display with a resolution of 250 x 122 pixels. It is powered wirelessly via NFC and transfers image data from an NFC-enabled smartphone or reader to the display. The module contains no battery.

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Technical overview

  • Resolution: 250 x 122; dot pitch: 0.194 × 0.194 mm; active display area: 23.70 × 48.55 mm.
  • Overall dimensions: 65.35 × 40.05 × 12.70 mm; housing made of ABS plastic.
  • Display: black/white, no backlight; last displayed content remains visible without power.
  • Refresh time approx. 2 s (excluding transfer time); viewing angle >170°.
  • Interface: SPI; power supply exclusively via NFC.
  • Android app requires Android 4.0+; per source, it does not support Samsung, Google, or Sony devices.
  • iOS app “NFC E-Tag” available via the App Store.
  • ST25R3911B NFC board acts as a reader/writer for image refresh via TF storage or serial transfer.

Notes and version constraints

  • PCB Rev2.2 replaced the NFC chip; before use, update both the mobile app and the ST25R3911B program — version-sensitive steps require human confirmation.
  • Initial device password is 12345678; security settings are context-dependent and should be verified.
  • NFC transfer requires stable positioning; moving the phone during refresh causes failures.
  • Image resolution must exactly match the display (2.13inch listed as 122 x 250 in some contexts); mismatches prevent correct rendering.
  • Operating conditions: 0–50°C, 35–65% RH; storage below 30°C for up to 6 months; after unpacking, complete assembly within 72 hours.

Source and revision record

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