Quelltext der Seite 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.

== Related products at JW Tech ==
* [https://shop.jw-tech.eu/p/WSAL31888 WSAL31888 – 1.54inch Passive NFC-Powered e-Paper (G), Red / Yellow / Black / White 4-color Displaying, No Battery, Wireless Powering &amp;amp; Data Transfer, Silver Metal Border]

== 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 ==
* [https://www.waveshare.com/wiki/1.54inch_NFC-Powered_e-Paper_(G) 1.54inch NFC-Powered e-Paper (G) - Waveshare Wiki]
* Source revision: 103621
* Captured: 2026-08-29T08:35:15+00:00
* SHA-256: <code>35727768859cdb634f6f57f473d6a36406c4f895d0e29181204e1ed85e50cc53</code>