The passive NFC-powered e-paper segment continues to expand across industrial labeling and smart signage scenarios. In late May 2026, Spotpear launched the upgraded 7.5-inch Passive NFC E-Paper V2 module, featuring optimized on-board NFC hardware and a complete cross-platform mobile editing workflow for battery-free static display use cases.

Marked as PCB Rev2.2, the latest version replaces the NFC chip on the motherboard and adopts a fast refresh algorithm, reducing the full-screen refresh cycle to approximately 5 seconds. As a fully passive e-ink device, the module requires no built-in battery or wired power supply. It harvests electrical energy from NFC radio fields when tapped by a compatible smartphone or dedicated ST25R3911B NFC reader, drawing power only during content updates. Thanks to the bistable property of e-paper technology, the black-and-white display retains content indefinitely after a single refresh with zero ongoing power consumption. It delivers a viewing angle of over 170 degrees and glare-free, paper-like readability, making it suitable for long-term indoor static display.

In terms of hardware specifications, the 7.5-inch panel features a native resolution of 800 × 480 pixels with a dot pitch of 0.205 × 0.204 mm. Housed in a durable integrated ABS shell, the unit measures 195.84 × 137.68 × 13.00 mm, which allows flexible mounting on warehouse racks, retail shelves, equipment panels and meeting room nameplates. Its backlight-free design also cuts long-term operation and maintenance costs for commercial and industrial users.

Spotpear supports the hardware with full mobile software tools covering both iOS and Android systems. iOS users can download the “NFC E-Tag” application from the App Store, while Android users install the dedicated NFCTag V3 APK via the official QR code. The app enables multi-step content creation: users can import photos from local albums, capture images in real time, or input custom text with adjustable fonts, colors and sizes. Built-in image processing tools include cropping, rotation, brightness and contrast tuning, plus multiple rendering effects such as grayscale, sketch and neon mode, allowing users to preview output before NFC transmission. A basic password lock function with a default code of 1234 is also included to prevent unauthorized content overwriting.

The official documentation also notes clear compatibility boundaries. Certain Samsung, Google and Sony Android handsets have unstable native NFC output and cannot complete normal screen refresh. The brand therefore recommends compatibility testing with target devices before bulk procurement.

For industrial-scale deployment, the ST25R3911B NFC writer board is available as an auxiliary tool. Operators can upload standardized BMP images to a TF card or transmit files via serial port, then batch-update multiple e-paper tags by placing the reader coil near the display surface. This dual update mode — mobile phones for small-batch personalized edits and dedicated readers for enterprise mass labeling — covers user groups ranging from individual hobbyists to retail chain operators and warehouse management teams.

Official usage guidelines also specify environmental limits. The module operates stably at an ambient temperature of 0–50°C, and long-term storage temperature should remain below 30°C to protect e-ink pixel lifespan.

Compared with smaller 1.54-inch to 4.2-inch passive NFC e-paper tags already on the market, this 7.5-inch V2 model offers larger display space for schedules, warehouse inventory tables and retail promotional graphics. The upgraded chipset and dual-terminal editing system address earlier generations’ drawbacks of slow refresh and limited software functions, serving as a practical large-format battery-free signage option in the growing passive e-paper industry.

Source: Spotpear Official Wiki