4.2 inch e-Paper Module 4.2inch E-Paper Display Module A 400 × 300 black-and-white e-paper display module with SPI interface, partial refresh support, wide viewing angle, and ultra-low power operation for embedded information displays. Key Features 4.2 inch e-paper panel with 400 × 300 resolution. Black and white display with 4-level grey scale. Supports partial refresh; full refresh takes about 5 seconds. No backlight required; content remains visible after power is removed. SPI interface for Raspberry Pi, Jetson Nano, Arduino, STM32, and other controller boards. Onboard voltage translator for 3.3V and 5V MCU compatibility. Specifications Operating voltage 3.3V / 5V Display color Black / White Interface 3-wire SPI / 4-wire SPI Grey scale 4 Resolution 400 × 300 pixels Display size 84.8 × 63.6mm Outline dimensions 103.0 × 78.5mm Full refresh time 5s Fast refresh time 1.5s, available on V2 version Partial refresh time 0.4s Refresh power 26.4mW typ. Standby current
