WAVESHARE ESP32-S3 1.54 Inch Ink Screen E-Paper AIoT Development Board 1. Display panel: 1.54-inch e-ink screen 2. Display resolution: 200 x 200 3. Communication interface: SPI 4. Display color: black, white 5. Viewing angle: more than 170 degrees 6. Gray level: 2 7. Global refresh: 2s 8. Local refresh: 0.3s 9. Display mode: reflective 10. Size: about 5.3 x 3.98 x 1.69cm Features: 1. Equipped with high-performance Xtensa 32-bit LX7 dual-core processor up to 240MHz 2. 2.4GHz Wi-Fi and Bluetooth 5 (LE) support, on-board internal antenna 3. Built-in 512KB SRAM and 384KB ROM, integrated Flash and PSRAM in stacked package 4. 1.54-inch e-ink screen with 200 x 200 resolution, high contrast ratio and wide viewing angle 5. Onboard audio codec chip, support voice capture and playback, easy to realize AI voice interaction applications 6. Onboard PCF85063 RTC real-time clock and SHTC3 temperature and humidity sensor, can realize accurate RTC time management and temperature and humidity monitoring 7. Micro SD card slot on board, can be connected to external Micro SD card to store pictures or files 8. Onboard PWR, BOOT two customizable function side buttons, convenient to use the buttons for custom function development 9. Reserve 2 x 6 2.54mm spacing female connector, convenient for external expansion use