Description M5Stack StampS3 ESP32-S3 Module is a compact controller board designed as a highly integrated embedded controller for compact devices, smart sensors, and connected nodes. Based on the StampS3 module architecture and the ESP32-S3FN8 chip, it combines Wi-Fi, onboard flash, GPIO breakout, a programmable RGB indicator, and a programmable button in one IoT controller module that is easy to use in SMT, DIP, or jumper-wire builds. Features M5Stack StampS3 ESP32-S3 Module uses the ESP32-S3FN8 with 8MB flash. This compact board works as a small embedded controller for IoT builds. The StampS3 module includes a programmable RGB LED and a programmable button. It exposes 23 GPIOs through 1.27mm and 2.54mm pitch options. The board is a flexible IoT controller module for SMT, DIP, and jumper-wire assembly. Specifications Product M5Stack StampS3 ESP32-S3 Module MCU ESP32-S3FN8 Flash 8MB Category ESP32-S3 controller board DCDC MUN3CAD01-SC Input Voltage 5V Interactive Parts Programmable button ×1, programmable RGB LED ×1 Antenna 2.4G 3D antenna GPIO 23 GPIOs Size 26mm × 18mm × 5mm Applications M5Stack StampS3 ESP32-S3 Module fits smart home nodes, wearables, compact medical devices, and custom embedded products that need a small wireless controller. Because the StampS3 module combines power regulation, control, and I/O access in one board, it works well as an embedded controller and a compact IoT controller module for fast product integration. Product List StampS3 x1 HY2.0-4P terminal x1 2.54-9P header x1 2.54-6P header x1 Hex key x1 User manual x1 Other Content The board is useful when a project needs more than a bare MCU but less than a large dev kit. Its mixed mounting options make the StampS3 module practical for direct integration into custom carriers, quick prototypes, and compact internal assemblies. Resources ESP32-S3 Datasheet MUN3CAD01-SC Datasheet M5Stack Documentation Portal FAQ What is StampS3 best used for?It is best used as a compact embedded controller in products that need Wi-Fi, GPIO access, and a small footprint. Why choose this board instead of a larger dev board?The StampS3 module keeps the system small while still acting as a capable IoT controller module with flexible mounting options.