# Adafruit ESP32-S2 Feather with w.FL Antenna > The Adafruit ESP32-S2 Feather with w.FL is a Feather-form WiFi microcontroller board with a w.FL (MHF4) external antenna connector for extended range. It features a 240MHz ESP32-S2 single-core CPU, 4MB flash, 2MB PSRAM, native USB-C, and LiPo battery charging — no Bluetooth. ## Quick Facts - **Brand:** Adafruit - **Board Type:** ESP32-S2 - **Price:** ~$17.5 - **Product Readiness:** developer - **CPU:** ESP32-S2 Xtensa LX7 single-core @ 240MHz - **CPU Architecture:** Xtensa LX7 single-core - **CPU Cores:** 1 - **RAM:** 320KB SRAM + 2MB PSRAM - **PSRAM:** 2MB - **Flash:** 4MB - **USB:** USB-C (native USB CDC/HID/MSC) - **Power:** USB-C 5V or LiPo battery - **Operating Voltage:** 3.3V GPIO - **Dimensions:** 52.0mm × 22.7mm - **Antenna:** w.FL ## Connectivity - **Wifi:** 2.4GHz 802.11 b/g/n ## Open Source - **Firmware:** Yes - **Schematics:** Yes - **PCB Layout:** Yes ## Certifications CE, FCC, RoHS ## Compatible Firmware circuitpython, arduino, esp-idf ## Use Cases - iot - prototyping - usb-hid-device - field-data-logger ## Components - **ESP32-S2** (mcu): Single-core Xtensa LX7 at 240MHz with native USB OTG, WiFi 802.11 b/g/n, and no Bluetooth. — [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=adafruit-feather-esp32-s2-wfl&source=md-export) - **PSRAM 2MB** (memory): External 2MB pseudo-static RAM for expanded working memory. — [Datasheet](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) ## Protocols - **I2C**: SDA: GPIO3, SCL: GPIO4 - **SPI**: SCK: GPIO36, MOSI: GPIO35, MISO: GPIO37 - **UART**: TX: GPIO43, RX: GPIO44 - **PWM** ## GPIO Map | Pin | Name | Type | Functions | |-----|------|------|-----------| | GPIO17 | A0 — Analog Input | ADC | adc, digital-input, digital-output, pwm | | GPIO18 | A1 — Analog Input | ADC | adc, digital-input, digital-output, pwm | | GPIO14 | A2 — Analog Input / Touch T4 | ADC | adc, touch, digital-input, digital-output, pwm | | GPIO15 | A3 — Analog Input / Touch T5 | ADC | adc, touch, digital-input, digital-output, pwm | | GPIO16 | A4 — Analog Input | ADC | adc, digital-input, digital-output, pwm | | GPIO8 | A5 — Analog Input / Touch T8 (ADC1, works during WiFi) | ADC | adc, touch, digital-input, digital-output, pwm | | GPIO36 | SCK — SPI Clock | SPI | digital-input, digital-output, pwm | | GPIO35 | MOSI — SPI Data Out | SPI | digital-input, digital-output, pwm | | GPIO37 | MISO — SPI Data In | SPI | digital-input, digital-output, pwm | | GPIO3 | SDA — I2C Data / STEMMA QT | I2C | digital-input, digital-output, pwm | | GPIO4 | SCL — I2C Clock / STEMMA QT | I2C | digital-input, digital-output, pwm | | GPIO5 | D5 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO6 | D6 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO9 | D9 — Digital GPIO / Touch T9 / ADC1_CH8 | — | adc, touch, digital-input, digital-output, pwm | | GPIO10 | D10 — Digital GPIO / Touch T10 / ADC1_CH9 | — | adc, touch, digital-input, digital-output, pwm | | GPIO11 | D11 — Digital GPIO | — | digital-input, digital-output, pwm | | GPIO12 | D12 — Digital GPIO / Touch T12 | — | touch, digital-input, digital-output, pwm | | GPIO13 | D13 / Red LED — Digital GPIO / Touch T13 | — | touch, digital-input, digital-output, pwm | | GPIO43 | TX — UART0 Transmit | UART | digital-input, digital-output, pwm | | GPIO44 | RX — UART0 Receive | UART | digital-input, digital-output, pwm | ## Available Software - **[CircuitPython](https://openhardware.directory/r?to=https%3A%2F%2Fcircuitpython.org%2Fboard%2Fadafruit_feather_esp32s2%2F&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)** - **[Adafruit ESP32-S2 Feather Guide](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export)** ## Description ## Overview The Adafruit ESP32-S2 Feather with w.FL Antenna is a variant of the standard ESP32-S2 Feather that replaces the onboard PCB trace antenna with a w.FL (MHF4) miniature coaxial connector. This enables connection of an external antenna for significantly improved WiFi range in environments where the built-in antenna falls short — through walls, in metal enclosures, or across larger spaces. Beyond the antenna, the board is identical to the standard ESP32-S2 Feather. At the heart of the board is the ESP32-S2 single-core Xtensa LX7 running at up to 240MHz. Unlike the dual-core ESP32, the S2 variant omits Bluetooth entirely but adds native USB — the USB-C connector connects directly to the ESP32-S2's built-in USB peripheral, enabling keyboard, mouse, MIDI, and mass-storage emulation without a UART bridge chip. This makes it particularly well-suited for USB HID and CDC applications. The board includes 4MB of SPI flash and 2MB of PSRAM for expanded memory, a STEMMA QT I2C connector for plug-and-play sensor integration, and built-in LiPoly battery charging with a JST-PH 2-pin connector. In deep sleep the board consumes only 80–100µA, making it suitable for battery-powered sensor nodes that wake periodically to transmit data. The Feather form factor ensures compatibility with the wide range of FeatherWing add-on boards. The ESP32-S2 Feather supports Arduino, CircuitPython, and ESP-IDF development. Adafruit provides extensive learning guides, and CircuitPython ships pre-installed, enabling immediate development without any additional toolchain setup. ## Where to Buy - [Adafruit](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) — $17.50 ## Resources - [product](https://openhardware.directory/r?to=https%3A%2F%2Fwww.adafruit.com%2Fproduct%2F6282&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) - [github](https://openhardware.directory/r?to=https%3A%2F%2Fgithub.com%2Fadafruit%2FAdafruit-ESP32-S2-Feather-PCB&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) - [wiki](https://openhardware.directory/r?to=https%3A%2F%2Flearn.adafruit.com%2Fadafruit-esp32-s2-feather&ref=openhardware.directory&product=adafruit-feather-esp32-s2-wfl&source=md-export) ## Tags `adafruit`, `feather`, `esp32-s2`, `wifi`, `native-usb`, `wfl-antenna`, `psram`, `lipo`, `circuitpython` ## Images ![Adafruit ESP32-S2 Feather with w.FL Antenna](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-feather-esp32-s2-wfl/fb7a356a41d5.jpg) ![Adafruit ESP32-S2 Feather with w.FL Antenna](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-feather-esp32-s2-wfl/6ff1cca67d44.jpg) ![Adafruit ESP32-S2 Feather with w.FL Antenna](https://nbg1.your-objectstorage.com/openhardware-directory/entities/adafruit-feather-esp32-s2-wfl/6e1a27cc869d.jpg) --- [View full device page](https://openhardware.directory/devices/adafruit-feather-esp32-s2-wfl)