RockBase IoT
NM-EPD-420 4.2-inch E-Paper Development Board
NM-EPD-420 is an ESP32-S3 4.2-inch e-paper development board with tri-color or black-and-white panels for low-power dashboards, outdoor signage, and smart labels.
- ESP32-S3 with 16 MB Flash and 8 MB PSRAM
- 4.2-inch 400 x 300 tri-color or black-and-white e-paper
- Optional LoRa with audio, AHT20, RGB LED, and microSD
NM-EPD-420 is a low-power e-paper development board built on ESP32-S3. The tri-color edition suits static weather stations and dashboards; the black-and-white edition enables faster partial refresh and supports a LoRa module by default.
Built for persistent display and low-power connection
The 400 x 300 e-paper display is suitable for outdoor signage, low-power information screens, smart labels, and LoRa nodes. See the product documentation for panel differences, refresh behavior, and interface definitions.