ESP32-WROOM-32U 4M 32Mbit WiFi Bluetooth Module w/ U.FL Connector
SKU: IOWC-1863
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ESP32-WROOM-32U 4M 32Mbit WiFi Bluetooth Module w/ U.FL Connector

₹349.00 (Inclusive of all taxes)
Out of Stock

The ESP32-WROOM-32U is a dual-core Wi-Fi and Bluetooth 4.2 module based on the Espressif ESP32 SoC, featuring 4 MB of flash memory and an integrated U.FL antenna connector for external antenna connection, ideal for robust IoT applications.

Features

  • Dual-core Xtensa LX6 MCU with integrated 4 MB flash for complex IoT firmware.
  • 802.11 b/g/n Wi-Fi with Station, SoftAP, and P2P modes for versatile network roles.
  • Bluetooth 4.2 supporting both Classic (BR/EDR) and Low Energy (BLE) protocols.
  • Integrated U.FL (IPEX) antenna connector for high-gain external antenna attachment.
  • Low-power operation from 2.2V to 3.6V with a typical active current of 80 mA.

Out of stock

Description

The ESP32-WROOM-32U module is a production-ready wireless communication solution built around the powerful ESP32 dual-core microcontroller. It integrates a complete RF front-end, 4 MB of SPI flash memory, and a U.FL connector, enabling reliable Wi-Fi and Bluetooth connectivity with the option for an external antenna to extend range and improve signal integrity in challenging RF environments.

Designed for low-power IoT deployments, the module supports a wide array of peripheral interfaces including SPI, I2C, I2S, UART, ADC, DAC, and capacitive touch, making it suitable for sensor networks, smart home devices, and industrial automation. Its robust protocol stack supports IPv4/IPv6, SSL, and MQTT, facilitating secure cloud connectivity.

Key Features

  • Dual-core 32-bit LX6 processor for efficient multitasking and DSP operations.
  • Integrated 4 MB (32 Mbit) SPI flash for application code and file system storage.
  • Comprehensive Wi-Fi 802.11 b/g/n support with advanced features like 802.11n (up to 150 Mbps).
  • Dual-mode Bluetooth v4.2 for both classic data streaming and BLE beacon/sensor applications.
  • On-module U.FL connector for easy mating with external antennas (e.g., 2.4GHz dipole or directional).
  • Extensive GPIO and peripheral support including touch sensors, PWM, and Hall effect sensor.
  • Advanced security features with hardware acceleration for AES, SHA, RSA, and ECC.
  • Low operating voltage range (2.2V to 3.6V) compatible with battery-powered designs.

Applications

  • Smart home automation hubs and sensor nodes.
  • Industrial wireless telemetry and IIoT gateways.
  • Bluetooth beacon networks and BLE mesh devices.
  • Battery-powered environmental monitoring sensors.
  • Prototyping and product development with Arduino IDE or ESP-IDF.

Technical Specifications

Microcontroller/SoCEspressif ESP32 (Xtensa dual-core 32-bit LX6)
Wireless ProtocolsWi-Fi 802.11 b/g/n/d/e/i/k/r, Bluetooth v4.2 BR/EDR & BLE
Flash Memory4 MB (32 Mbit)
SRAM520 KB
Supply Voltage2.2 V - 3.6 V DC
Operating Current (Typical)80 mA
Antenna ConnectorU.FL (IPEX)
InterfacesUART, SPI, I2C, I2S, SDIO, PWM, ADC, DAC, GPIO, Touch
SecurityWPA/WPA2/WPA2-Enterprise, AES/SHA/RSA/ECC Hardware Acceleration
Operating Temperature-40°C to +85°C (typical for ESP32)
Dimensions (L x W)20 mm x 18 mm

Frequently Asked Questions

What is the difference between the ESP32-WROOM-32U and the ESP32-WROOM-32D?

The ESP32-WROOM-32U integrates a U.FL (IPEX) antenna connector on the module PCB, allowing direct connection of an external antenna via a pigtail cable. The ESP32-WROOM-32D variant has a PCB trace antenna and requires soldering or an adapter for an external antenna. All other electrical specifications, including the ESP32 chip, flash memory, and performance, are identical between the two models.

How do I connect an external antenna to the ESP32-WROOM-32U module?

The module features a female U.FL connector. You will need a compatible U.FL to SMA (or RP-SMA) pigtail cable. Gently press the connector on the pigtail onto the module's U.FL port until it clicks. Route the cable appropriately and connect your chosen 2.4GHz antenna (e.g., a 2dBi dipole or 5dBi omni) to the other end. Ensure the antenna is impedance-matched (50 ohms) for optimal Wi-Fi and Bluetooth RF performance.

What development frameworks are supported for programming this module?

The ESP32-WROOM-32U is fully supported by Espressif's official ESP-IDF (IoT Development Framework) for low-level control and FreeRTOS. It is also widely compatible with the Arduino Core for ESP32 via the Arduino IDE or PlatformIO, and MicroPython. You can flash firmware using a USB-to-serial adapter connected to the module's TX, RX, GPIO0, and EN pins, following standard ESP32 bootloader procedures.

What is the typical power consumption in active and deep sleep modes?

During active Wi-Fi/Bluetooth transmission, the module draws a typical current of 80 mA at 3.3V. In deep sleep mode, with the RTC and memory preserved, consumption can drop to approximately 10 µA. Power management is handled via the ESP32's internal functions, allowing for battery-operated designs. Always provide a stable 2.2V to 3.6V power supply with adequate current capability, especially during RF transmission peaks.

Package Includes

  • 1 x ESP32-WROOM-32U WiFi Bluetooth Module

Additional Information

Weight 0.008 kg
Dimensions 2 × 1.8 cm

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