# FeatherS2 Neo ESP32-S2 > ESP32-S2 Feather-format board by Unexpected Maker with 4MB flash, 2MB PSRAM, 5×5 RGB LED matrix, LiPo charging, and STEMMA QT — designed for colorful wearable and IoT projects. ## Quick Facts - **Brand:** Unexpected Maker - **Board Type:** feather - **Price:** ~$24.5 - **Product Readiness:** developer - **CPU:** ESP32-S2 - **CPU Architecture:** Xtensa LX7 - **CPU Cores:** 1 - **RAM:** 320KB - **PSRAM:** 2 MB - **Flash:** 4MB - **Power:** 5V + LiPo - **Operating Voltage:** 3.3V ## Connectivity - **Wifi:** 802.11b/g/n ## Open Source - **Firmware:** Yes - **Schematics:** Yes - **PCB Layout:** No ## Compatible Firmware circuitpython, micropython, arduino, esp-idf ## Use Cases - wearable - iot - prototyping - led-lighting - wifi ## Components - **ESP32-S2** (mcu): Single-core 240 MHz Xtensa LX7 with Wi-Fi 4, native USB, 320KB SRAM. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.espressif.com%2Fsites%2Fdefault%2Ffiles%2Fdocumentation%2Fesp32-s2_datasheet_en.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export) - **WS2812B 5x5 RGB LED Matrix** (led): 5×5 grid of 25 addressable RGB LEDs with user-controlled LDO power. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fdatasheets%2FWS2812B.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export) ## Protocols - **I2C**: SDA: GPIO3, SCL: GPIO4 - **SPI**: MOSI: GPIO35, MISO: GPIO36, SCK: GPIO37 - **UART**: TX: GPIO43, RX: GPIO44 - **I2S**: ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO1 | D1 | GPIO | digital | | GPIO3 | SDA | I2C | i2c-sda, digital | | GPIO4 | SCL | I2C | i2c-scl, digital | | GPIO5 | D5 | GPIO | digital, pwm | | GPIO6 | D6 | GPIO | digital, pwm | | GPIO7 | D7 | GPIO | digital, pwm | | GPIO8 | D8 | GPIO | digital, pwm | | GPIO9 | D9 | GPIO | digital, pwm | | GPIO10 | D10 | GPIO | digital, pwm | | GPIO11 | D11 | GPIO | digital | | GPIO12 | D12 | GPIO | digital | | GPIO14 | A2 | GPIO | analog, digital | | GPIO15 | A3 | GPIO | analog, digital | | GPIO17 | A0 | GPIO | analog, digital | | GPIO18 | A1 | GPIO | analog, digital | | GPIO34 | VBUS Detect | GPIO | digital | | GPIO35 | MOSI | SPI | spi-mosi, digital | | GPIO36 | MISO | SPI | spi-miso, digital | | GPIO37 | SCK | SPI | spi-sck, digital | | GPIO40 | RGB LED Data | GPIO | digital | | GPIO43 | TX | UART | uart-tx, digital | | GPIO44 | RX | UART | uart-rx, digital | ## Available Software - **[CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Funexpectedmaker_feathers2%2F&ref=openhardware.directory&product=feathers2-neo&source=md-export)** - **[Manufacturer Docs](https://openhardware.directory/r?to=https%3A%2F%2Funexpectedmaker.com%2Ffeathers2-neo&ref=openhardware.directory&product=feathers2-neo&source=md-export)** ## Description ## Overview The FeatherS2 Neo is an ESP32-S2 development board produced by Unexpected Maker in the popular Adafruit Feather form factor. It stands out with its integrated 5×5 addressable RGB LED matrix controlled through a dedicated user-switchable LDO regulator, making it ideal for colorful wearable projects and IoT displays without consuming main-board power when idle. The board is built around the ESP32-S2 single-core 240 MHz processor paired with 4 MB SPI Flash and 2 MB extra PSRAM, delivering ample resources for CircuitPython, MicroPython, or Arduino projects requiring Wi-Fi connectivity. A 3D high-gain antenna handles 2.4 GHz 802.11 b/g/n communication. The 700 mA 3.3V LDO regulator, built-in LiPo battery charging with indicator LED, VBAT voltage sensing, and VBUS detection make it a complete battery-ready platform. A STEMMA QT connector (Qwiic-compatible) provides plug-and-play I2C connectivity for sensors and peripherals. The UF2 bootloader simplifies firmware updates via drag-and-drop, and CircuitPython support is mature and well-documented. With 22 available GPIO pins and all standard Feather peripherals, the FeatherS2 Neo is compatible with a large ecosystem of FeatherWing add-on boards. ## Where to Buy - [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5629&ref=openhardware.directory&product=feathers2-neo&source=md-export) — 24.5 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F5629&ref=openhardware.directory&product=feathers2-neo&source=md-export) - [schematic](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5629%2FFeatherS2_Neo_P1_Schematic.pdf&ref=openhardware.directory&product=feathers2-neo&source=md-export) - [pinout](https://openhardware.directory/r?to=https%3A%2F%2Fcdn-shop.adafruit.com%2Fproduct-files%2F5629%2F5629-pinout.png&ref=openhardware.directory&product=feathers2-neo&source=md-export) ## Tags `feather`, `esp32-s2`, `unexpected-maker`, `rgb-matrix`, `circuitpython`, `wearable`, `lipo` ## Images ![FeatherS2 Neo ESP32-S2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/feathers2-neo/bb313d2d6769.jpg) ![FeatherS2 Neo ESP32-S2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/feathers2-neo/b1596c2e4612.jpg) ![FeatherS2 Neo ESP32-S2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/feathers2-neo/4814554b9480.jpg) ![FeatherS2 Neo ESP32-S2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/feathers2-neo/21ace24a31d8.jpg) ![FeatherS2 Neo ESP32-S2](https://nbg1.your-objectstorage.com/openhardware-directory/entities/feathers2-neo/6253f7e43fd7.jpg) --- [View full device page](https://openhardware.directory/devices/feathers2-neo)