ESP32-WROOM-32U
Overview
The ESP32-WROOM-32U is an Espressif ESP32-based radio module that provides a u.FL/external-antenna option for designs that need a replaceable or remotely located antenna. It packages the ESP32 wireless SoC and supporting RF components in a compact module footprint so you can add Wi-Fi and Bluetooth capability without doing your own RF layout. The external antenna connector gives flexibility for different antenna types, tuning, or field replacement.
Why Choose This Part
The external-antenna variant removes the need to commit to a PCB antenna footprint and lets engineers optimize antenna placement for range or form factor. Using a prebuilt ESP32 module reduces RF development and integration effort compared with designing a discrete ESP32 RF front end. The u.FL connector also makes field replacement, tuning, or regulatory testing simpler.
Applications
Getting Started
Developers can start with common ESP32 development boards and Espressif's ESP-IDF toolchain or the Arduino core for ESP32; flashing and debugging typically use esptool.py and a USB-to-UART adapter. For modules with u.FL connectors, use a short pigtail to connect to bench antennas during bring-up, and verify antenna routing and ground clearances on your carrier PCB when integrating the module.
Dev Boards
Development boards and breakout modules featuring the ESP32-WROOM-32U or compatible chips — ready to use for prototyping.
ESP32-WROOM Family
Comparing specs that differ across variants. The current part is highlighted.
| Part Number | Memory | Interfaces | Antenna Type | Tx Power | Voltage | Utilized IC / Part | Stock |
|---|---|---|---|---|---|---|---|
| ESP32-WROOM-32U (this part) | — | — | — | — | — | — | 1,058 |
| ESP32-WROOM-32UE-N16 | 16MB | ADC, GPIO, I2C, I2.. | Antenna Not Includ.. | 20dBm | 3V | D0WD-32 | 1,845 |
| ESP32-WROOM-32E-N4 | 4MB | ADC, GPIO, I2C, I2.. | Integrated, Trace | 20dBm | 3V | D0WD-32 | 7,664 |
| ESP32-WROOM-32E-H4 | 4MB | ADC, GPIO, I2C, I2.. | Integrated, Trace | 20dBm | 3V | D0WD-32 | 11,846 |
| ESP32-WROOM-32E-N16 | 16MB | ADC, GPIO, I2C, I2.. | Integrated, Trace | 20dBm | 3V | D0WD-32 | 13,112 |
| ESP32-WROOM-32UE-N4 | 4MB | ADC, GPIO, I2C, I2.. | Antenna Not Includ.. | 20dBm | 3V | D0WD-32 | 582 |
| ESP32-WROOM-32E-N8 | 8MB | ADC, GPIO, I2C, I2.. | PCB Trace | 20dBm | 3V | D0WD-32 | 20,366 |
| ESP32-WROOM-32D | 448k | GPIO, I2C, I2S, PW.. | Integrated, Trace | 20.5dBm | 2.7V | D0WD-32 | — |
Also Consider
Espressif Systems
- WROVER family offers modules with additional RAM (PSRAM) and an external-antenna option if you need more memory for heavier workloads.
Espressif Systems
- RISC-V-based ESP32-C3 module with an external antenna option for lower-power or cost-sensitive applications while retaining Wi-Fi and Bluetooth LE.
