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WSAL31888 – 1.54inch NFC-Powered e-Paper (G)/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 module combines a 1.54-inch e-paper display with 200×200 resolution and NFC powering without a battery. Content is updated wirelessly via an NFC-enabled phone or reader.

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Technical overview

  • Resolution: 200 × 200 pixels; dot pitch 0.135 × 0.135 mm.
  • Display colors: red, black, white, yellow.
  • Powered solely by NFC; no battery required.
  • Refresh time approximately 15 seconds.
  • Viewing angle greater than 170 degrees.
  • Outline dimensions: 47.84 mm × 41.28 mm; active display size 27.00 mm × 27.00 mm.
  • ABS plastic housing with good strength and toughness.
  • Device access password: 12345678.

Notes and version constraints

  • According to the source, the app does not support Samsung, Google, or Sony devices; verify compatibility before use.
  • Enable NFC on the phone; do not move the device during transfer because NFC range is limited.
  • Image resolution must match the 200×200 display resolution or refresh may fail.
  • Operating conditions: temperature 0–50°C, humidity 35–65% RH; storage below 30°C and below 55% RH for up to 6 months; transport at −25–70°C for up to 10 days.
  • After unpacking: operate at 20°C ± 5°C and 50 ± 5% RH; complete assembly within 72 hours.
  • The ST25R3911B NFC board requires a Micro USB connection to a PC or 5 V supply and a TF card containing a monochrome bitmap; exact commands are not fully specified in the source.
  • Version-sensitive steps and possible app changes should be confirmed by technical staff before deployment.

Source and revision record

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