Adafruit ESP32-S2 Feather

Overview

The Adafruit ESP32-S2 Feather brings Espressif's single-core 240 MHz ESP32-S2 into the popular Feather form factor, complete with 4 MB of Flash and 2 MB of PSRAM. Native USB means the board can emulate keyboards, mice, MIDI controllers, and USB mass-storage devices without any additional chip — just plug in and the UF2 bootloader appears as a drive for drag-and-drop firmware updates.

A STEMMA QT connector gives access to Adafruit's large I2C sensor ecosystem without soldering, and switchable power control on the QT port lets you cut sensor power between readings. A MAX17048 fuel-gauge IC provides accurate battery state-of-charge readings from an attached LiPoly cell, and the onboard charging circuit brings the cell to full via the USB-C port.

Deep sleep current sits between 80 and 100 µA with the right firmware, making the board suitable for battery-powered IoT nodes that need to wake, sample, post data, and sleep repeatedly. The standard Feather pinout ensures compatibility with the broad Wing and FeatherWing accessory ecosystem covering displays, GPS, cellular modems, and more.

CircuitPython and Arduino are both supported. Espressif's ESP-IDF is available for developers who need lower-level control of the S2's hardware security features, USB-OTG peripheral, and advanced power-management options.