The Elecrow CrowPanel ESP32 3.7” E-paper HMI Display is a versatile and energy-efficient human-machine interface (HMI) solution. Featuring a 3.7-inch E-paper display with a resolution of 240x416 pixels, it offers a high-contrast black-and-white interface, making it ideal for applications requiring low power consumption and readability under various lighting conditions. Powered by the ESP32-S3 chip, this module ensures robust performance and supports multiple development environments, including Arduino IDE, ESP-IDF, and MicroPython. It communicates via an SPI interface, facilitating easy integration with other components. The CrowPanel is equipped with a range of input options, including a rotary switch, back and home buttons, and a 2x10 pin GPIO interface, providing flexibility for user interaction. Its ultra-low power consumption means it only draws power during screen refreshes, extending battery life significantly. Additionally, the data persists even during power outages, ensuring reliability in critical applications. Encased in a white acrylic housing, the CrowPanel combines durability with a sleek design, making it suitable for a variety of projects such as smart labels, e-readers, and portable devices.