Description Stamp-S3A Module is a highly integrated embedded module based on the Espressif ESP32-S3FN8. It combines a 240MHz Xtensa 32-bit LX7 dual-core processor, 8MB Flash, a programmable RGB LED, a user button, and an optimized 2.4GHz 3D antenna for compact IoT and embedded control designs. The module breaks out 23 GPIOs through 1.27mm and 2.54mm pitch options, supporting SMT, DIP, fly-wire, socket, and Unit-style integration. With rich interfaces such as touch sensor, SPI, UART, I2C, I2S, GPIO, pulse counter, PWM, SDIO, and SD/MMC host control, the Stamp-S3A Module gives developers a flexible core for smart devices and industrial terminals. For smart home products, intelligent IoT devices, wearable electronics, and compact control panels, the Stamp-S3A Module provides a small footprint, strong wireless performance, and development support for Arduino IDE, UiFlow2, ESP-IDF, and PlatformIO. Notes ESP32-S3 pins G0 and G46 are strapping pins that determine boot mode. By default, G0 is pulled up and G46 is internally pulled down so the chip can boot from SPI Flash. Do not pull G46 high before boot, or the chip may not start correctly. Features Stamp-S3A Module core: ESP32-S3FN8 with 240MHz dual-core Xtensa LX7 processor and 8MB Flash. Wireless design: optimized 2.4GHz 3D antenna for stronger communication performance. Rich I/O: 23 GPIOs with 1.27mm and 2.54mm pitch SMT/DIP integration options. Built-in interaction: programmable RGB LED and physical user button. Flexible development: supports Arduino IDE, UiFlow2, ESP-IDF, and PlatformIO workflows. Application forms: suitable for SMT, DIP, fly-wire, socket, and Unit-style embedded builds. Specifications SoC ESP32-S3FN8, Xtensa LX7 dual-core, up to 240MHz Flash 8MB DC-DC MUN3CAD01-SC Wireless 2.4GHz Wi-Fi Input voltage DC 5V HMI 1 x programmable physical button, 1 x programmable RGB LED WS2812B-2020 Antenna type 2.4GHz 3D antenna Module resource interfaces Touch Sensor, SD/SDIO/MMC Host Ctrl, SPI, SDIO/SPI Slave Ctrl, EMAC, Motor PWM, LED PWM, UART, I2C, I2S, GPIO, Pulse Counter IO interfaces 23 GPIOs: G0-G15, G39-G44, G46 IO pitch 2.54mm and 1.27mm LCD FPC pitch 0.5mm at 12P or 8P Operating temperature 0 to 40 deg C Module size 26.0 x 18.0 x 4.7mm Module weight 2.9g Package size 138.0 x 93.0 x 10.5mm Gross weight 7.1g Applications Stamp-S3A Module core for smart home controllers and IoT nodes. Industrial control terminals and compact automation devices. Wearable electronics and low-power connected products. Prototype-to-product embedded modules that need Wi-Fi, GPIO, and flexible mounting. Product List 1 x Stamp-S3A 1 x HY2.0-4P Terminal 1 x 2.54-9P Male Header 1 x 2.54-6P Male Header 1 x Hex Key L-Shape 1.5mm (For M2 Screw) 1 x Pin Sticker Other Content The back of the module reserves an SPI interface for a TFT display, with compatible 8-pin and 12-pin FPC connector options. Use the schematic and model size files to confirm boot pins, GPIO allocation, and mechanical clearance before final PCB integration. The Stamp-S3A Module can be programmed through Arduino IDE or UiFlow2, while the ESP32-S3 datasheet and DC-DC datasheet provide deeper electrical reference for custom hardware design. For custom carrier boards, the Stamp-S3A Module helps keep the controller compact while preserving Wi-Fi, GPIO, button, LED, and display-expansion options. Resources Stamp-S3A Module product document Stamp-S3A Arduino IDE programming guide Stamp-S3A UiFlow2 programming guide Stamp-S3A schematic PDF Stamp-S3A model size PDF Stamp-S3A structure files ESP32-S3 datasheet PDF MUN3CAD01-SC DC-DC datasheet PDF Stamp-S3A Module documentation PDF FAQ What processor does it use? It uses the ESP32-S3FN8 with a dual-core Xtensa LX7 processor running up to 240MHz. How many GPIOs are available? The module exposes 23 GPIOs for embedded integration. Which development platforms are supported? It supports Arduino IDE, UiFlow2, ESP-IDF, and PlatformIO workflows. Is it suitable for compact IoT products? Yes. The Stamp-S3A Module is suitable for smart home, intelligent IoT, industrial control, and wearable device designs. What boot-pin caution should be noted? Do not pull G46 high before boot, because G0 and G46 are strapping pins that determine boot mode.
