Name: ESP32-S3-WROOM-1U
Brand: Espressif Systems

Overview

The ESP32-S3-WROOM-1U is a powerful WiFi and Bluetooth 5 (LE) MCU module based on the Xtensa dual-core 32-bit LX7 microprocessor running at up to 240 MHz. This specific variant features a U.FL connector for an external antenna, making it ideal for applications requiring high-gain antennas or enclosure-mounted RF solutions. It includes 16MB of flash and 512KB of SRAM, along with dedicated AI acceleration instructions for edge computing workloads.

Why Choose This Part

The module provides superior RF flexibility by allowing the use of external antennas via a U.FL connector, bypassing the limitations of PCB trace antennas. Engineers benefit from the LX7 core's AI instructions, which significantly speed up neural network inference for image and audio processing at the edge. Additionally, the high 16MB flash capacity and rich peripheral set, including 20 ADC channels and USB OTG, simplify complex system designs.

Applications

Industrial IoT Gateways

Uses the U.FL connector to route WiFi/Bluetooth signals to an external high-gain antenna mounted outside of metal enclosures.

AI-Powered Voice Recognition

Leverages the LX7 AI acceleration and 16MB flash for local keyword spotting and simple natural language processing.

Connected HMI Panels

Utilizes the onboard GDI and camera interface for building interactive smart displays with integrated visual sensing.

Battery-Powered Edge Devices

Takes advantage of the integrated power management and Li-ion charging circuitry for compact, portable monitoring equipment.

Getting Started

Developers can use the Espressif IoT Development Framework (ESP-IDF) or the Arduino IDE for software development. The module is pin-compatible with other S3 series modules, allowing for easy migration between PCB and external antenna designs. For initial evaluation, the ESP32-S3-DevKitC-1-N16R8 is a common platform, though a U.FL-to-SMA pigtail and a 2.4GHz antenna are required for this specific module.

Dev Boards

Development boards and breakout modules featuring the ESP32-S3-WROOM-1U or compatible chips — ready to use for prototyping.

Arduino Nano ESP32 Arduino

The Arduino Nano ESP32-S3 (ABX00083) is an advanced microcontroller platform featuring the powerful Xtensa® processor co

Digi-Key Mouser 3,289 in stock

Arduino Nano ESP32-S3 Arduino

Arduino Nano ESP32 — ESP32-S3 based, WiFi + BLE, USB-C, Arduino Cloud compatible.

ESP32-S3-DevKitC-1-N8R8 Espressif Systems

The ESP32-S3-DEVKITC-1-N8R8 from Espressif Systems is a development board designed for RF, RFID, and wireless applicatio

Digi-Key Mouser 475 in stock

ESP32-S3-DevKitC-1 Espressif Systems

Development board based on the ESP32-S3 family when you need additional AI/ML or USB functionality.

Mouser 1,051 in stock

ESP32-S3-DevKitC-1-N32R16V Espressif Systems

Multiprotocol Development Tools The ESP32-S3-DevKitC-1 is an entry-level development board equipped with ESP32-S3-WROOM-

Mouser 477 in stock

ESP32-S3-WROOM Family

Comparing specs that differ across variants. The current part is highlighted.

Part Number	Memory	Protocol	Sensitivity	Antenna Type	RF Family/Standard	Utilized IC / Part	Stock
ESP32-S3-WROOM-1U (this part)	—	—	—	—	—	—	604
ESP32-S3-WROOM-1-N4	4MB	802.11b/g/n, Bluet..	-103.5dBm	PCB Trace	Bluetooth, WiFi	S3-32	4,969
ESP32-S3-WROOM-1U-N4	4MB	802.11b/g/n, Bluet..	-103.5dBm	Antenna Not Includ..	Bluetooth, WiFi	S3-32	356
ESP32-S3-WROOM-1U-N16R8	16MB	802.11b/g/n, Bluet..	-103.5dBm	Antenna Not Includ..	Bluetooth, WiFi	S3R8-32	5,856
ESP32-S3-WROOM-1	4MB	802.11b/g/n, Bluet..	-103.5dBm	PCB Trace	Bluetooth, WiFi	S3-32	4,206
ESP32-S3-WROOM-1-N8R8	8MB	802.11b/g/n, Bluet..	-104.5dBm	PCB Trace	Bluetooth, WiFi	S3R8-32	6,215
ESP32-S3-WROOM-1-N8R2 (Espressif)	8MB	802.11a/b/g/n, Blu..	—	PCB Trace	WiFi	S3-32	6,903

Also available as: ESP32-S3-WROOM-1-N8, ESP32-S3-WROOM-1-N4R8, ESP32-S3-WROOM-1U-N8, ESP32-S3-WROOM-1U-N4R2, ESP32-S3-WROOM-1-N16R8, ESP32-S3-WROOM-1-N16, ESP32-S3-WROOM-1-N4R2

Also Consider

ESP32-S3-WROOM-1-N16R8

Espressif Systems - Choose this version if your design can accommodate an integrated PCB trace antenna instead of an external one.

ESP32-C3-WROOM-02U

Espressif Systems - A cost-effective, RISC-V single-core alternative with a U.FL connector for simpler IoT applications with lower power requirements.