ZecTrix Note 4: A 4.2-inch ESP32-S3 E-Ink Display with AI Voice Input

churchkey · x · 2026-08-07

ZecTrix Lab has introduced Note 4, a smart sticky note hardware powered by the ESP32-S3 chip. It features a 4.2-inch e-paper display (with a four-color Note 4C variant) and supports voice interaction via a built-in microphone.

The device also includes Wi-Fi, Bluetooth, NFC, a 2,000mAh battery, and GPIO expansion. Compatible with open-source firmware, it can be used to display reminders, notes, and weather, or serve as a board for custom hardware projects.

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