Description The M5Stack M5StampS3 is a compact ESP32-S3 module for embedded products, wireless controllers, smart devices, and PCB-level IoT development. This shared product page covers two header-pin variants: M5StampS3 PIN1.27 with SKU M5-S007-PIN127 and M5StampS3 PIN2.54 with SKU M5-S007-PIN254. Both M5Stack M5StampS3 variants use the ESP32-S3FN8 with an Xtensa 32-bit LX7 dual-core processor up to 240MHz, 8MB Flash, 2.4GHz Wi-Fi, 23 GPIO resources, a programmable physical button, and a WS2812B-2020 programmable RGB LED. The same ESP32-S3 module core can be used as a compact IoT controller, Wi-Fi IoT module, embedded development module, smart home node, wearable controller, or small wireless product controller. The difference between the variants is the header pin pitch. Choose M5-S007-PIN127 or M5StampS3 PIN1.27 for dense PCB integration, and choose M5-S007-PIN254 or M5StampS3 PIN2.54 for easier manual wiring, breadboard-style prototyping, and ESP32-S3 development board workflows that benefit from larger 2.54mm spacing. For teams standardizing on the M5Stack M5StampS3 ESP32-S3 module, both pin variants keep the same 8MB Flash, 23 GPIO layout, Wi-Fi connectivity, programmable button, RGB LED, and compact 26 x 18 x 4.6mm footprint. This makes the M5Stack M5StampS3 suitable for moving from prototype wiring to a tighter production PCB without changing the module family. Features Two selectable variants: M5-S007-PIN127 uses 1.27mm header pin pitch, while M5-S007-PIN254 uses 2.54mm header pin pitch. M5Stack M5StampS3 module: compact ESP32-S3 module for IoT controllers, smart devices, wireless sensor nodes, and embedded products. ESP32-S3FN8 core: Xtensa 32-bit LX7 dual-core processor up to 240MHz for compact embedded applications and ESP32-S3 development module projects. 8MB Flash: provides local program storage for IoT firmware, control logic, and connected-device applications. 2.4GHz Wi-Fi: supports wireless connectivity for smart devices, sensor nodes, and compact controller projects. 23 GPIO resources: exposes GPIOs including G0-G15, G39-G44, and G46 for flexible peripheral integration. Built-in interaction: includes one programmable physical button and one WS2812B-2020 programmable RGB LED. Compact IoT controller: 26 x 18 x 4.6mm module footprint supports space-limited products and embedded designs. Development ecosystem: suitable for UiFlow, Arduino IDE, ESP-IDF, PlatformIO, and ESP32-S3 embedded workflows. Specifications Variant SKU M5-S007-PIN127: Pin 1.27, 1.27mm header pin pitch Variant SKU M5-S007-PIN254: Pin 2.54, 2.54mm header pin pitch Product M5Stack M5StampS3 ESP32-S3 Module with 1.27 / 2.54 Header Pin SoC ESP32-S3FN8, Xtensa 32-bit LX7 dual-core, up to 240MHz Flash 8MB Wireless 2.4GHz Wi-Fi with 2.4G 3D antenna DC-DC MUN3CAD01-SC Input Voltage 5V Human-Machine Interaction Programmable physical button x1, WS2812B-2020 programmable RGB LED x1 Module Resource Interface Touch sensor, SD/SDIO/MMC host controller, SPI, SDIO/SPI slave controller, EMAC, motor PWM, LED PWM, UART, I2C, I2S, GPIO, pulse counter IO Interface 23 GPIOs: G0/G1/G2/G3/G4/G5/G6/G7/G8/G9/G10/G11/G12/G13/G14/G15/G39/G40/G41/G42/G43/G44/G46 LCD Interface Pitch 0.5mm at 12-pin or 8-pin Operating Temperature 0 to 40 degrees C Product Size 26 x 18 x 4.6mm Package Size 74 x 48 x 13mm Product Weight PIN1.27: 2.9g; PIN2.54: 3.4g Gross / Package Weight PIN1.27: 5.6g; PIN2.54: 6.3g Applications Smart home devices, compact wireless controllers, and IoT sensor nodes. PCB-level embedded products that need a small ESP32-S3 module with rich GPIO. M5Stack M5StampS3 ESP32-S3 development module projects that need 8MB Flash, Wi-Fi, and 23 GPIO in a compact footprint. Wearable prototypes, medical equipment prototypes, and low-power connected devices. Industrial sensor nodes, compact automation controllers, and wireless data acquisition. Development boards, firmware prototypes, and ESP32-S3 proof-of-concept projects. Product List Selected variant M5-S007-PIN127: M5StampS3 PIN1.27 x1, silk screen stickers x1 Selected variant M5-S007-PIN254: M5StampS3 PIN2.54 x1, silk screen stickers x1 Other Content Variant selection note: The 1.27mm and 2.54mm variants share the same M5Stack M5StampS3 ESP32-S3 module core. Select M5-S007-PIN127 for a dense embedded development module layout, or select M5-S007-PIN254 when the compact IoT controller needs easier hand wiring. Integration note: Confirm antenna clearance, USB access, button access, LED visibility, GPIO mapping, power supply, and programming method before designing the M5Stack M5StampS3 into a custom board. Pin pitch note: M5StampS3 PIN1.27 is better for dense board layouts, while M5StampS3 PIN2.54 is easier for manual wiring and common prototyping headers. Software note: Validate firmware, boot mode, flash image, GPIO assignments, ESP32-S3 peripheral libraries, and Wi-Fi IoT module behavior before moving from prototype to production hardware. Development note: The M5Stack M5StampS3 can serve as a small ESP32-S3 development board alternative when the project needs 8MB Flash, 23 GPIO, Wi-Fi, a button, and RGB LED in a module format. Resources M5Stack M5StampS3 PIN1.27 Official Documentation M5Stack M5StampS3 PIN2.54 Official Documentation M5StampS3 Official Schematic PDF ESP32-S3 Datasheet MUN3CAD01-SC Datasheet FAQ What is the difference between M5-S007-PIN127 and M5-S007-PIN254? M5-S007-PIN127 uses a 1.27mm header pin pitch, while M5-S007-PIN254 uses a 2.54mm header pin pitch. The ESP32-S3 module core is the same. Which pin pitch should I choose? Choose 1.27mm for dense PCB integration and 2.54mm for easier manual wiring, prototyping, and common header spacing. Is M5Stack M5StampS3 an ESP32-S3 module? Yes. M5Stack M5StampS3 is an ESP32-S3 module based on ESP32-S3FN8 with 8MB Flash, 2.4GHz Wi-Fi, and 23 GPIO resources. Can this compact IoT controller replace a larger ESP32-S3 development board? For many embedded products, yes. The M5Stack M5StampS3 ESP32-S3 module is designed for compact IoT controller and embedded development module use where a small footprint matters. Which chip does M5StampS3 use? It uses ESP32-S3FN8 with an Xtensa 32-bit LX7 dual-core processor up to 240MHz. How much Flash does it include? It includes 8MB Flash. What is included with each variant? Each selected variant includes one matching M5StampS3 module and one set of silk screen stickers.
