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Adafruit ESP32-S2 Feather

Adafruit ESP32-S2 Feather

MPN: 5325
Adafruit Industries LLC
ESP32-S2 ESP32-S 802.11 b/g/n (WiFi/WLAN/Wi-Fi 4) Transceiver 2.4GHz Evaluation Board
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Overview

The Adafruit 5325 is an ESP32-S2 based evaluation board designed for low-power WiFi applications with native USB support. It features a 240MHz Xtensa LX7 processor, 512KB of internal RAM, and 8MB of external flash memory in a compact Feather-compatible form factor. This board is particularly suited for developers moving from classic ESP32 to the S2 platform for its improved security features and native USB HID capabilities.

Why Choose This Part

The board integrates a native USB stack which simplifies firmware updates and eliminates the need for external bridge chips. It provides extensive security features including secure boot and flash encryption, making it suitable for sensitive IoT deployments. The 8MB of flash provides significant headroom for complex CircuitPython scripts or large Arduino projects.

Applications

WiFi Data Loggers
Utilizes the 802.11 b/g/n radio and low-power sleep modes (down to 1uA shutdown) for battery-operated remote sensing.
USB Peripheral Emulation
Leverages native USB to act as a keyboard, mouse, or MIDI device without needing a separate USB-to-Serial chip.
Secure IoT Nodes
Implements hardware-accelerated AES, RSA, and digital signatures for encrypted cloud communication.
Battery-Powered Wearables
Takes advantage of the integrated LiPo charging circuitry and ultra-low-power coprocessor for long-term monitoring.

Getting Started

Developers can program the board using the Arduino IDE with the ESP32 board manager or via CircuitPython by dragging and dropping files onto the recognized USB drive. For professional development, the ESP-IDF toolchain provides full control over the dual-core LX7 and ULP coprocessor. The board includes a standard Feather header layout, making it compatible with a wide range of Wings and shields.

Also Consider

Adafruit Feather M4 Express Adafruit Industries LLC - Alternative Feather-format board with a SAMD51 processor if native WiFi is not required but higher analog performance is needed.