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WSAL17746 – 2.9inch NFC-Powered e-Paper/en

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Version vom 6. September 2026, 00:41 Uhr von JWTechPublisher (Diskussion | Beiträge) (Freigegebene technische Dokumentation veröffentlicht; Text-only und noindex)
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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 2.9-inch e-paper display (296×128 resolution) with NFC power delivery and no battery. Content is transmitted wirelessly via an NFC-enabled smartphone or reader and updated on the display.

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Technical overview

  • Display resolution: 296 × 128 pixels; dot pitch 0.138 mm × 0.138 mm
  • No backlight required: e-paper retains last displayed content indefinitely without power
  • Contains no internal power source such as a battery – suitable for applications with limited power supply
  • Content can be customized and controlled at any time using a smartphone
  • Housing made of ABS plastic with good strength and toughness
  • Companion Android app for editing and managing display content
  • Suitable for equipment labels, shelf labels, information storage
  • Current PCB version Rev2.2: replaced NFC chip on motherboard, display updated using a fast flashing method
  • Before use: update the mobile app and ST25R3911B NFC Board program to the latest versions

Commands and examples – verify before use:  

NFC-Bereich des Telefons auf die Antennenfläche auf der Rückseite des E-Papers legen
ST25R3911B-NFC-Board: USB-Anschluss an PC oder 5V-Versorgung anschließen
Monochromes BMP auf TF-Karte kopieren und in das Kartenslot des NFC-Boards einlegen
Im Menü „Update E-paper SD“ auswählen und ein passendes Bild wählen
Alternativ: „Update E-paper UART“ für serielle Übertragung von BMP-Bildern verwenden

Notes and version constraints

  • The stated Android app does not support Samsung, Google, or Sony devices according to the source; compatibility with other models must be verified individually
  • Initial device password is 1234 – change before deployment
  • Do not move the phone during transmission; limited NFC range can cause refresh failures
  • Image resolution must exactly match 128 × 296 (special case per FAQ)
  • Operating conditions: temperature 0–50 °C, humidity 35–65 % RH; storage below 30 °C, max. 6 months
  • After unpacking: assemble within 72 hours at 20 °C ± 5 °C and 50 ± 5 % RH

Source and revision record

Abgerufen von „https://wiki.jw-tech.eu/index.php?title=WSAL17746_–_2.9inch_NFC-Powered_e-Paper/en&oldid=2042“