M5Stack has introduced the PaperColor, a compact development board built around the ESP32-S3R8 processor and a 4-inch Spectra 6 full-color e-paper display. The platform combines wireless connectivity, onboard sensors, audio hardware, battery operation, and expansion interfaces for low-power IoT and embedded display applications. The system is based on the ESP32-S3R8 SoC featuring dual Xtensa LX7 cores operating at up to…