The M5StampS3A with 2.54 Header Pin is a highly integrated embedded development module based on the Espressif ESP32-S3FN8 dual-core processor (240 MHz Xtensa® LX7). It comes with 8 MB Flash, a programmable RGB LED, and a physical button, making it ideal for rapid prototyping and compact IoT applications.
With its optimized 3D antenna design, the module delivers enhanced wireless performance and lower power consumption compared to the previous generation. It breaks out 23 multifunction GPIO pins via 2.54 mm pitch SMT headers, supporting multiple interfaces including UART, I²C, SPI, I²S, PWM, EMAC, and more. Its compact size makes it perfect for high-density PCB integration in smart home devices, industrial control systems, and wearable electronics.
Features
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ESP32-S3FN8 SoC – Dual-core Xtensa LX7 @ 240 MHz with 8 MB Flash.
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Optimized 3D Antenna – Improved wireless signal reception.
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23 GPIO Pins – Supports UART, I²C, SPI, I²S, PWM, EMAC, touch sensing, and more.
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2.54 mm Pitch SMT Headers – Easy integration into breadboards or PCBs.
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Programmable RGB LED – WS2812B-2020 for visual feedback.
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Physical Button – Programmable for user input or reset.
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Multiple Development Platforms – UiFlow2, Arduino IDE, ESP-IDF, PlatformIO.
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Compact & Lightweight – Only 26 × 18 × 4.7 mm, 3.1 g.
Includes
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1 × M5StampS3A with 2.54 Header Pin
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1 × Pin Sticker
Applications
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🏠 Smart Home Devices – Control hubs, automation modules, and sensors.
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🌐 IoT Projects – Wireless data acquisition and cloud-connected devices.
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🏭 Industrial Control Terminals – Compact controllers for automation systems.
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⌚ Wearable Electronics – Low-power, small form-factor embedded systems.
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📡 Prototyping & Development – Ideal for rapid hardware iteration.
Specifications
Parameter | Details |
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SoC | ESP32-S3FN8 Dual-core Xtensa LX7 @ 240 MHz |
Flash | 8 MB |
Input Voltage | DC 5 V |
HMI | 1 × programmable button, 1 × WS2812B-2020 RGB LED |
Antenna | 2.4 GHz 3D antenna |
I/O Ports | Touch sensor, SD/SDIO/MMC host, SPI, SDIO/SPI slave, EMAC, Motor PWM, LED PWM, UART, I²C, I²S, GPIO, pulse counter |
GPIO Count | 23 pins (G0–G15, G39–G46) |
IO Pitch | 2.54 mm |
LCD Pitch | 0.5 mm @ 12P or 8P |
Operating Temp | 0–40 °C |
Product Size | 26.0 × 18.0 × 4.7 mm |
Product Weight | 3.1 g |
Package Size | 74.0 × 48.0 × 13.0 mm |
Gross Weight | 7.6 g |
Product Comparison
Feature | Stamp-S3A PIN2.54 | Stamp-S3 PIN2.54 |
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RGB LED Control Logic | LED power shared with reserved screen FPC backlight | Powered on immediately when powered |
Antenna Design | Optimized for better signal reception | Standard design |
Boot Button | Improved tactile feel, 4.0 × 3.0 × 2.0 mm | 2.6 × 1.6 × 0.55 mm |
Power Consumption | Optimized for lower power | Standard design |