TinyS3 ESP32-S3 with u.FL
Ultra-compact ESP32-S3 board by Unexpected Maker in TinyPICO form factor with u.FL external antenna connector, 8MB flash, 8MB PSRAM, LiPo charging, and dual-core 240 MHz.
$20.00
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Specifications
Components
Bus Interfaces
GPIO Map
Overview
The TinyS3 with u.FL is a variant of Unexpected Maker's popular TinyS3 board, differing only in antenna configuration: instead of the onboard 3D PCB antenna, it provides a u.FL (IPEX/MHF1) connector for attaching an external antenna. This makes it ideal for projects installed inside metal enclosures, products requiring a specific antenna placement, or applications needing extended Wi-Fi and Bluetooth range.
The ESP32-S3 dual-core Xtensa LX7 processor runs at 240 MHz with 8 MB of QSPI flash and 8 MB of extra QSPI PSRAM — substantial resources for TensorFlow Lite models, image buffers, or CircuitPython with large libraries. The ultra-low deep-sleep current makes it suitable for battery-powered deployments. A 700 mA 3.3V LDO regulator, LiPo battery charging via JST-PH pads, VBAT voltage sense, and 5V presence detection are all included.
The TinyS3 u.FL maintains form-factor compatibility with TinyPICO and TinyS2 boards, and the UF2 bootloader enables drag-and-drop firmware updates. With 17 available GPIO pins and all standard ESP32-S3 peripherals, it is compatible with CircuitPython, Arduino 2.0.3+, MicroPython, and ESP-IDF. An external antenna (sold separately) must be connected before use.
Use Cases
5IoT
Internet of Things applications including connected sensors, actuators, and smart devices that communicate over WiFi, BLE, LoRa, or other wireless protocols.
Wearable
Body-worn computing devices including smartwatches, fitness bands, and health monitors.
Prototyping
Rapid hardware prototyping and proof-of-concept development with breadboard-friendly form factors and accessible development environments.
wifi
Education
Teaching programming, electronics, and computer science concepts. Popular in schools, universities, and coding bootcamps.
Where to Buy
Available Software
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