Description The M5Stack AtomS3 Lite is a compact programmable controller built around the ESP32-S3FN8. Measuring only 24.0 x 24.0 x 9.5mm, it combines 8MB SPI flash, Wi-Fi, a built-in 3D antenna, USB Type-C programming, an RGB status LED, an IR transmitter, a programmable button, and a HY2.0-4P expansion interface. This AtomS3 Lite development kit is designed for small IoT nodes, embedded controllers, rapid prototypes, and smart-device projects that need a tiny ESP32-S3 controller with convenient expansion pins and mounting options. Notice: To flash firmware, press and hold the reset button for about 2 seconds until the internal green LED lights up, then release it to enter download mode. Features ESP32-S3FN8 controller with 8MB SPI flash and integrated Wi-Fi. USB Type-C port for program download and serial communication. Programmable button, RGB status LED, and infrared transmitter. HY2.0-4P interface plus six GPIO female headers for expansion. 5V to 3.3V power circuit with 3.3V output. M2 rear screw hole for compact mounting in embedded projects. Supports UIFlow2, Arduino IDE, ESP-IDF, and PlatformIO workflows. Specifications SoC ESP32-S3FN8 Flash 8MB RGB WS2812C-2020 DC-DC SY8089 Operating Temperature 0 ~ 40°C Power Voltage 5V Power Method Type-C Output Voltage 3.3V IO Interface 6 pins: G5/G6/G7/G8/G38/G39 Product Size 24.0 x 24.0 x 9.5mm Product Weight 5.3g Package Size 85.0 x 65.0 x 12.2mm Gross Weight 11.0g Applications Compact IoT sensor and control nodes Microcontroller learning and prototyping Infrared remote control projects Smart home device prototypes USB-C programmable embedded controllers Product List 1 AtomS3-Lite Other Content The AtomS3 Lite exposes a HY2.0-4P port for quick peripheral wiring. The port maps black to GND, red to 5V, yellow to G2, and white to G1. HY2.0-4P Pin Black Red Yellow White PORT.CUSTOM Signal GND 5V G2 G1 Use this AtomS3 Lite when a project needs a small ESP32-S3 board with USB programming, GPIO expansion, and onboard indicators in a very compact enclosure. Resources AtomS3-Lite Product Documentation AtomS3-Lite Schematics PDF AtomS3-Lite Structure Files ESP32-S3 Datasheet SY8089 Datasheet AtomS3-Lite Arduino Quick Start AtomS3-Lite Arduino Library AtomS3-Lite UIFlow2 Quick Start AtomS3-Lite Factory Firmware EasyLoader FAQ What controller does the M5Stack AtomS3 Lite use? It uses the ESP32-S3FN8 controller with 8MB SPI flash. How do I enter download mode? Hold the reset button for about 2 seconds until the internal green LED lights up, then release it. Which development platforms are supported? The AtomS3 Lite supports UIFlow2, Arduino IDE, ESP-IDF, and PlatformIO workflows.
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