Adafruit QT Py ESP32-S2 with uFL Antenna

Overview

The Adafruit QT Py ESP32-S2 with uFL Antenna Port is identical to the standard QT Py ESP32-S2 but replaces the built-in PCB antenna with a u.FL / IPEX connector. This allows you to attach an external 2.4 GHz antenna for greater WiFi range, particularly useful in enclosures made of metal or other RF-blocking materials where a PCB antenna would be insufficient.

The board measures just 21.8 × 17.9 mm and carries 4 MB of Flash and 2 MB of PSRAM, making it capable of running full CircuitPython applications with WiFi and multiple sensor drivers loaded simultaneously. Native USB-C provides keyboard, mouse, MIDI, and mass-storage emulation via the ESP32-S2's hardware USB OTG peripheral.

A STEMMA QT / Qwiic connector allows immediate I2C sensor integration without soldering, and the five capacitive-touch capable GPIO pins can be accessed directly in CircuitPython. Ten 12-bit ADC inputs and an 8-bit DAC on two pins make analogue interfacing easy. The 3.3 V 600 mA regulator can comfortably drive external sensors.

Note that no antenna is included with the board. A separate 2.4 GHz mini flexible WiFi antenna with u.FL connector or a u.FL-to-RP-SMA pigtail is required to make use of the connector. Without an attached antenna, WiFi range will be significantly lower than a PCB-antenna variant.