Arduino I/O Expansion Board

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ESP32

2.9 inch Label Board(BW)

Published

Label, ESP32, SSD1680, SPI

Introduction

1. The 2.9 inch Label Board is a 2.9-inch black & white E-Ink electronic shelf label (ESL) based on the ESP32-WROOM-32E. It integrates a WiFi access point and a web-based editor, so you can design product price tags, generate EAN-13 barcodes, and send photos from your phone's album straight to the e-paper — without installing any app. Labels can optionally be archived to a TF card for redundant storage.

2. The e-paper display retains its image even when power is removed. Energy is consumed only while refreshing; a static image can persist for years. This makes the A32 ideal for supermarkets, convenience stores and warehouses where content stays on display for long periods but changes only occasionally.

Specifications

Display size	2.9 inch, 296 × 128 pixels
Display color	Black & white (1-bit)
MCU	ESP32-WROOM-32E (WiFi + BLE dual-mode)
Connectivity	Built-in WiFi access point (no external router required)
Editor	Built-in web editor — no app installation
Label templates	4 presets (Standard / Large Price / Promo / Minimal) + custom images
Barcode	Built-in EAN-13 generator with automatic check digit
Storage	Optional TF (Micro SD) card for redundant label storage
UI languages	English / Russian, switchable
Refresh	Full-screen refresh in approx. 2–3 s
Power supply	USB-C, 5 V

Hardware

The expansion board routes display bus, touch signals, and SD card interface to standard headers. Confirm controller board logic level before use.

Size

FAQ

What if compilation shows insufficient capacity?

Reduce font and bitmap resources, or choose a controller with more capacity.

What if colors are abnormal?

Check driver model, color order, and initialization orientation settings.

Downloads

Demo

A32 Label 2 9 bw V30.zip

Download