WSAL31888 – 1.54inch NFC-Powered e-Paper (G)/en
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
- 1.54inch NFC-Powered e-Paper (G) - Waveshare Wiki
- Source revision: 103621
- Captured: 2026-08-29T08:35:15+00:00
- SHA-256:
35727768859cdb634f6f57f473d6a36406c4f895d0e29181204e1ed85e50cc53