Adafruit ESP32 Feather V2 w.FL Antenna 8MB Flash 2MB PSRAM STEMMA QT
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Adafruit ESP32 Feather V2 w.FL Antenna 8MB Flash 2MB PSRAM STEMMA QT
Description
The Adafruit ESP32 Feather V2 w.FL Antenna is a compact ESP32 Feather development board for WiFi, Bluetooth, and connected IoT prototypes. It combines an ESP32 Pico Mini module, 8MB Flash, 2MB PSRAM, USB-C, LiPo charging, STEMMA QT, and a w.FL / MHF3 / IPEX3 antenna connector for projects that need an external antenna.
This Adafruit ESP32 Feather V2 is useful when a board will sit inside an enclosure, behind a panel, or in a lab setup where the PCB antenna version is not ideal. The Feather format keeps the board breadboard friendly while allowing it to work with many FeatherWing add-ons, I2C sensors, Arduino sketches, MicroPython code, and ESP-IDF prototypes.
The antenna connector is w.FL / MHF3 / IPEX3, not standard u.FL. A LiPo battery, USB-C cable, and external antenna are not included, so choose the cable and antenna type that fit the enclosure and RF design.
Features
- ESP32 dual-core 240MHz Xtensa processor with WiFi and Bluetooth Classic / BLE.
- 8MB SPI Flash and 2MB PSRAM for larger buffers and more capable wireless applications.
- w.FL / MHF3 / IPEX3 antenna connector for external antennas in enclosed or higher-gain installations.
- USB-C for power, programming, serial debugging, and a more modern connector than Micro-B.
- STEMMA QT connector for plug-and-play I2C sensors with switchable 3.3V power.
- Built-in LiPo charging, battery monitoring divider, reset button, user button on GPIO 38, charge/user LEDs, and a controllable NeoPixel.
- CP2102N USB-to-serial converter supports reliable high-speed upload and debug workflows.
- Feather form factor supports breadboard use and compatible FeatherWing expansion boards.
Specifications
| OpenELAB SKU | Adafruit-5438 |
| Official Product Name | Adafruit ESP32 Feather V2 w.FL Antenna - 8MB Flash + 2MB PSRAM - STEMMA QT |
| Processor | ESP32 dual-core 240MHz Xtensa LX6 |
| Memory | 8MB SPI Flash, 2MB PSRAM, 520KB integrated SRAM |
| Wireless | 802.11b/g/n WiFi, Bluetooth Classic, Bluetooth Low Energy |
| Antenna Connector | w.FL / MHF3 / IPEX3, external antenna not included |
| USB-to-Serial | CP2102N |
| Connectors | USB-C, STEMMA QT / Qwiic I2C, LiPo JST, Feather headers |
| Power | USB-C or LiPo battery with onboard charging |
| Dimensions | 52.0mm x 22.8mm x 7.2mm |
| Weight | 6.0g |
Applications
- WiFi and Bluetooth IoT prototypes that require an external antenna.
- Battery-powered wireless sensors, data loggers, monitors, and connected lab devices.
- Arduino, MicroPython, and ESP-IDF firmware development in the Feather ecosystem.
- STEMMA QT sensor projects for education, prototyping, and maker-space demos.
- Enclosure-mounted ESP32 projects where antenna placement must be separated from the PCB.
Product List
- 1 x Adafruit ESP32 Feather V2 w.FL Antenna development board
- 1 x set of solderable headers
- LiPo battery, USB-C cable, and external antenna are not included
Other Content
The official pinout and hardware diagrams below help confirm the Adafruit ESP32 Feather V2 GPIO, power, I2C, antenna, and mechanical details before wiring the board into a prototype.

The detailed pinout identifies GPIO, analog inputs, SPI, UART, I2C, reset, user button, NeoPixel, and the pin-number changes from earlier ESP32 Feather boards.

The power diagram highlights USB-C, LiPo charging, battery monitoring, and the power pins used in low-power builds.

The STEMMA QT view shows the I2C connector used for quick sensor expansion with switchable 3.3V power.

Official schematic and fabrication diagrams are useful for debugging, documentation, enclosure planning, and verifying board revisions.


Resources
- Official Adafruit ESP32 Feather V2 Learn Guide
- Official pinouts and interface guide
- ESP32-PICO-MINI-02U-N8R2 datasheet
- Adafruit ESP32 Feather V2 PCB files
FAQ
Is the antenna connector u.FL?
No. The Adafruit ESP32 Feather V2 w.FL uses w.FL / MHF3 / IPEX3, not the more common u.FL connector.
Does it include an external antenna?
No. The board and headers are included; an antenna, LiPo battery, and USB-C cable are selected separately for the project.
Can this board be used with Arduino?
Yes. This ESP32 Feather development board is suitable for Arduino workflows, MicroPython experiments, and lower-level ESP-IDF prototyping.
What is STEMMA QT used for?
STEMMA QT provides a quick I2C connection for compatible sensors and breakouts without hand-wiring the I2C bus.
What projects fit this Feather board?
It fits WiFi sensors, Bluetooth prototypes, battery-powered IoT devices, classroom demos, and enclosures that need an external antenna path.
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