Wave 7.5" NFC-Powered E-Paper Dev Kit

Waveshare's 7.5-inch Passive NFC-Powered e-paper devices can receive both data and power over NFC, the same technology used to wirelessly recharge smartphones. So when it comes time to update the e-paper device with new content, an NFC-enabled smartphone and NFC Tag app can be used to handle the transfer and power required to perform the change. The end result is very cheap e-paper devices that never need to be recharged.



The 7.5-inch model has a screen resolution of 880-by-520, 170-degree viewing angles, and two-level greyscale output. Screen refresh times are four-to-five seconds, but that also includes the wireless data transfer from the phone.

Product Video

Quick Spec

• Power: NFC-powered
• Resolution: 880x520
• Dot Pitch: 0.205 × 0.204
• Refresh Time: 5s
• Display Colour: black, white
• Viewing Angle: >170°
• Net Weight: 445g

NFC Board Layout

1. STM32F103RBT6
• Core: ARM® 32-bit Cortex™-M3
• Operating Frequency: 72MHz
• Operating Voltage: 2.0V-3.6V
• Package: LQFP64
• Memories: 128kB Flash, 20kB SRAM
• Communication Interfaces: 2 x SPI, 3 x USART, 2 x I2C, 1 x CAN, 1 x USB
• AD & DA Converters: 2 x AD (12-bit, shares 16 channels)
2. ST25R3911B: NFC chip, aka AS3911B
3. 23LC1024: SRAM, 1Mbit
4. CP2102: USB TO UART converter, for debugging
5. SPX3819: 3.3V voltage regulator
6. 1.3" OLED: blue display, 128×64 pixels, SH1106 driver
7. 4x user buttons
8. 2x user indicators
9. MCU unused pins
10. USB TO UART port
11. Micro SD slot
12. SWD programming interface
13. NFC induction coil
14. UART pin configuration
• RXD: connected to RXD2 by default, changeable to RXD1 via 0Ω resistor
• TXD: connected to TXD2 by default, changeable to TXD1 via 0Ω resistor

Resources

• Product Page
• Product Wiki
• Android App
• ST25R3911B-NFC-Demo

Shipping List

• 1 x 7.5inch NFC-Powered HD e-Paper
• 1 x ST25R3911B NFC Board
• 1 x Micro SD Card 16GB
• 1 x Micro SD Card reader
• 1 x USB-A to Micro-B cable