ESP32WROOM32U

The ESP32-WROOM-32U is a wireless system-in-package module from Espressif that combines the ESP32 dual‑core MCU, Wi‑Fi and Bluetooth radios, RF front end, and flash memory into a compact form factor. It is designed for IoT and embedded applications requiring reliable 2.4 GHz connectivity and a rich set of peripherals.

Key features include a dual-core Xtensa LX6 processor up to 240 MHz, 802.11 b/g/n Wi‑Fi, and Bluetooth Classic BR/EDR along with BLE. The module typically includes external SPI flash memory (commonly 4 MB, with variations offering different sizes) and on‑chip SRAM to support code, data, and runtime operations. The exact flash size can vary by production run and configuration.

The suffix U denotes an external antenna option via a U.FL coax connector, allowing the use of an external antenna for extended range or placement flexibility. This contrasts with the ESP32-WROOM-32D variant, which uses an onboard PCB antenna. The module provides a broad set of I/O interfaces, including GPIO, SPI, I2C, UART, I2S, PWM, ADC, DAC, touch sensors, and other peripheral controllers, all operating at 3.3V logic.

Power management supports various sleep modes suitable for low-power applications, and the device is designed to run with typical 3.3V supply in embedded systems. Development and support are provided through Espressif’s ESP-IDF, as well as third-party ecosystems such as the Arduino core and MicroPython, making it adaptable for rapid prototyping and production.

Applications span smart home devices, industrial automation, sensors, and edge computing projects requiring combined Wi‑Fi and Bluetooth connectivity.