CoreS3-SE is the lightweight version of the third-generation CoreS3 in the M5Stack development-kit family. Powered by an ESP32-S3 SoC with dual-core Xtensa LX7 processors running at 240 MHz, it integrates 2.4 GHz Wi-Fi, 16 MB Flash and 8 MB PSRAM. Programs can be downloaded via the USB Type-C interface, which also supports OTG and CDC for easy connection to USB devices and firmware flashing. The front side features a 2.0-inch capacitive IPS touch screen protected by high-strength glass. Power management is handled by an AXP2101 PMU together with four power-flow control loops, enabling an overall low-power design. A built-in microSD card slot is provided. The on-board BM8563 RTC offers accurate timekeeping plus sleep–timed wake-up. Audio output is delivered through a high-fidelity 16-bit I2S amplifier (AW88298) driving the built-in 1 W speaker, while audio input is handled by an ES7210 codec with dual-microphone input. Independent POWER and RESET (RST) buttons are located on the side, with a dedicated delay circuit that allows entering download mode by long-pressing the RESET button. This unit is well suited for IoT development, DIY projects, smart-home control systems and industrial automation.
Due to hardware differences between CoreS3-SE and CoreS3, the sections of the library related to the camera, proximity sensor, IMU and magnetometer are not applicable to CoreS3-SE.
Compared with the CoreS3, the CoreS3-SE is not equipped with a camera (GC0308), proximity sensor (LTR-553ALS-WA), IMU (BMI270) or magnetometer (BMM150). The CoreS3-SE comes in a mid-gray color different from the black-gray of the CoreS3, and the touch area of the glass panel extends to the camera position. The DinBase dock included with the original CoreS3 kit has been removed.
