M5Stamp S3 WiFi and BLE IoT module offers up to 23 GPIOs through 2.54mm and 1.27mm pitch holes

M5Stamp S3, aka M5Stamp ESP32S2 or Stamp S3, is a tiny ESP32-S3 WiFi & Bluetooth LE (BLE) IoT module with a USB Type-C port, over 20 I/Os available through 2.54mm and 1.27mm pitch headers and castellated holes, and a heat-resistant cover.

Many of the "new" ESP32-S3 hardware platforms launches these days are often updates from an ESP32 design, and the M5Stack's M5Stamp S3 is no exception building on the original M5Stamp Pico, and its ESP32-C3 variants, namely M5Stamp C3 and C3U.

M5Stamp S3 specifications:

The board can be programmed with Arduino or the company's UIFlow online IDE, and let's hope they have put more effort into the latter, as the documentation only links to an RGB LED blink sample. Target applications include Smart Home appliances, wearables, and medical equipment. The heat-resistant plastic protects the main components and the 3D antenna and can be installed before soldering onto or inserting the module into the customer's board.

The main advantage of using ESP32-S3 over ESP32-C3 are the vector instructions for machine learning, having two cores, a little bit more SRAM, and a greater number of I/Os. It's difficult to benefit from the extra GPIOs on such a small module, so instead of just providing 2.54mm pitch headers, M5Stack added some 1.27mm pitch through holes with most I/Os also offered through castellated holes to enable SMT soldering. They also added some pads to solder an FPC connector.

M5Stack is selling the M5Stamp S3 for $7.5 plus shipping.

Jean-Luc started CNX Software in 2010 as a part-time endeavor, before quitting his job as a software engineering manager, and starting to write daily news, and reviews full time later in 2011.

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