SKU: IOWC-1861
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ESP32-WROOM-32U 16M 64Mbit WiFi Bluetooth Module w/ U.FL Connector

₹365.00 (Inclusive of all taxes)
Out of Stock

The ESP32-WROOM-32U is a dual-core Wi-Fi and Bluetooth 4.2 (BR/EDR/BLE) module with an integrated U.FL antenna connector, designed for embedded IoT applications. It operates from 2.2V to 3.6V and is programmable via ESP-IDF, Arduino IDE, or MicroPython.

Features

  • Dual-core Xtensa LX6 processor with 520KB SRAM for demanding IoT tasks like voice encoding and MP3 streaming.
  • Integrated 802.11 b/g/n Wi-Fi supporting Station, SoftAP, and Station+AP modes with WPA/WPA2 security.
  • Bluetooth 4.2 with BR/EDR and BLE support for short-range device connectivity.
  • Built-in U.FL/IPEX antenna connector for optimal RF performance and range extension.
  • Rich peripheral set including SPI, I2C, UART, ADC, DAC, touch sensors, and PWM for versatile hardware interfacing.

Out of stock

Description

The ESP32-WROOM-32U module is a highly integrated system-on-chip (SoC) solution built around the Espressif ESP32-D0WD dual-core processor. It combines Wi-Fi, classic Bluetooth, and Bluetooth Low Energy (BLE) on a single PCB, targeting a spectrum of applications from low-power sensor networks to compute-intensive edge processing. The inclusion of a U.FL connector distinguishes it from the solder-pad antenna version, providing a reliable, low-loss RF interface for external antennas to maximize wireless range and signal integrity.

Engineered for robust IoT deployment, the module supports a wide operating voltage range and features advanced power management with multiple sleep modes to minimize energy consumption. Its comprehensive suite of interfaces—including GPIO, I2C, SPI, UART, I2S, and capacitive touch—enables direct connection to sensors, displays, and actuators, simplifying system design. The on-chip hardware encryption accelerators (AES, SHA, RSA) ensure secure communication for connected devices over MQTT, HTTP, TCP/IP, and other standard IoT protocols.

Key Features

  • Dual-core 32-bit LX6 microprocessor with up to 240 MHz clock frequency for high-performance computing.
  • Integrated 802.11b/g/n Wi-Fi with support for IPv4/IPv6, TCP/UDP, HTTP, FTP, and MQTT protocols.
  • Dual-mode Bluetooth 4.2 supporting both Classic (BR/EDR) for audio and BLE for low-energy sensor networks.
  • On-board U.FL (IPEX) connector for attaching external Wi-Fi/Bluetooth antennas to improve signal strength and coverage.
  • Hardware-accelerated encryption (AES, RSA, SHA) for secure TLS/SSL connections and device authentication.
  • Extensive peripheral interfaces: 34x programmable GPIOs, 12-bit SAR ADC, 8-bit DAC, Hall sensor, and touch pins.
  • Low-power operating modes including Deep-sleep for battery-powered applications requiring years of operation.
  • Pre-flashed with bootloader for easy firmware updates via serial port using esptool.py or Arduino IDE.

Applications

  • Smart home automation hubs and wireless sensor nodes for temperature, humidity, and motion.
  • Industrial IoT (IIoT) telemetry systems for remote monitoring and control over Wi-Fi.
  • Bluetooth-enabled consumer devices like smart speakers, wearables, and remote controls.
  • Prototyping and development of connected products using Arduino IDE or ESP-IDF framework.
  • Battery-powered environmental sensors leveraging BLE for low-energy data transmission.

Technical Specifications

Microcontroller/SoCEspressif ESP32-D0WD (Dual-core Xtensa LX6)
Wireless ProtocolsWi-Fi 802.11 b/g/n, Bluetooth 4.2 BR/EDR & BLE
Frequency Range2.4 GHz ISM Band
RF Transmit PowerUp to +20 dBm (typical)
Supply Voltage2.2V to 3.6V DC
Operating Current~80 mA (typical active)
InterfacesUART, SPI, I2C, I2S, SDIO, PWM, ADC, DAC, GPIO, Touch
Antenna ConnectorU.FL (IPEX) Female
Operating Temperature-40°C to +85°C
Dimensions18 mm (L) x 20 mm (W)

Frequently Asked Questions

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

The primary difference is the antenna interface. The ESP32-WROOM-32U integrates a U.FL (IPEX) connector for attaching an external antenna, while the ESP32-WROOM-32D uses a PCB trace antenna. Electrically and functionally they are identical, sharing the same dual-core ESP32 chip, memory, and peripherals. The U.FL version offers better RF performance and range by allowing connection to higher-gain directional or omnidirectional antennas.

How do I program the ESP32-WROOM-32U module for my IoT project?

You can program it using Espressif's official ESP-IDF framework, the Arduino IDE with the ESP32 board package, or MicroPython. Connect the module's UART0 pins (GPIO1/TXD, GPIO3/RXD) to a USB-to-Serial adapter (e.g., CP2102, CH340). Ensure GPIO0 is pulled low during reset to enter bootloader mode for initial flashing. Use esptool.py to upload firmware binaries. The module comes pre-flashed with a bootloader, ready for development.

What type of antenna should I use with the U.FL connector, and what is the typical Wi-Fi range?

Use a 2.4GHz Wi-Fi/Bluetooth antenna with a U.FL male connector and 50-ohm impedance. A standard 2dBi dipole antenna provides omnidirectional coverage with a range of approximately 100-150 meters in open space. For longer ranges, a 5dBi or higher-gain directional antenna can be used, but ensure compliance with local RF emission regulations. The module's output power is configurable up to +20 dBm, and range is highly dependent on environment and antenna selection.

What are the power supply requirements and how can I minimize current consumption for battery operation?

Supply a stable voltage between 2.2V and 3.6V to the VCC pin. Typical active current is around 80 mA with Wi-Fi connected. For battery operation, utilize the ESP32's deep sleep mode, which reduces current to ~10 µA. Wake the module periodically via timer, external interrupt, or touch sensor to transmit data. Ensure your voltage regulator has low quiescent current. Always measure actual consumption in your specific configuration, as RF activity and peripheral use significantly affect drain.

Package Includes

  • 1 x ESP32-WROOM-32U Wi-Fi Bluetooth Module

Additional Information

Weight 0.008 kg
Dimensions 1.8 × 2 cm

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