ESPRESSIF ESP32-WROOM-32 Module 4M=32mbit

SKU: FA1053-1-0-0
Microcontroller

ESP32-D0WDQ6, Xtensa dual-core 32-bit LX6
Clock Speed

Up to 240 MHz
Flash Memory

4 MB (32 Mbit)
Wireless

Wi-Fi 802.11 b/g/n, Bluetooth v4.2 BR/EDR + BLE
GPIO Count

Up to 32 GPIOs (5 strapping)
Operating Voltage

3.0 – 3.6 V
Operating Temperature

-40°C to +85°C
Dimensions

18 × 25.5 × 3.1 mm

The ESP32-WROOM-32 is a general-purpose Wi-Fi + Bluetooth + Bluetooth LE MCU module from Espressif Systems, designed for a broad spectrum of IoT applications. It is built around the ESP32-D0WDQ6 chip, featuring a dual-core Xtensa 32-bit LX6 microprocessor with a clock frequency of up to 240 MHz . The module integrates a 4 MB SPI flash, a 40 MHz crystal oscillator, and supports both Wi-Fi (802.11 b/g/n) and Bluetooth v4.2 (BR/EDR and BLE) . With its rich set of peripherals and low-power modes, it is suitable for everything from simple sensor nodes to demanding tasks like voice encoding and audio streaming .

The module’s compact form factor (18 × 25.5 × 3.1 mm) and onboard PCB antenna make it easy to embed into space-constrained designs . It exposes up to 32 GPIOs, with 5 strapping pins for boot configuration, and supports a wide array of interfaces including UART, SPI, I2C, I2S, SDIO, PWM, ADC, DAC, and capacitive touch sensing . For low-power applications, the module supports Deep-sleep mode, where current consumption can drop to around 10 µA with RTC timer enabled, making it ideal for battery-powered IoT devices .

Development support is extensive, with official support for Espressif’s ESP-IDF and the Arduino IDE through the Arduino-ESP32 core . A simple workflow involves adding the board manager URL, selecting the correct board (e.g., “ESP32 Dev Module” for generic boards), and uploading sketches via a USB-to-UART interface . The module is suitable for both individual makers and businesses purchasing for product development, smart home devices, industrial automation, and more .

Features

  • Dual-Core Processing: Xtensa 32-bit LX6 dual-core microprocessor, up to 240 MHz.

  • Integrated Wireless: Wi-Fi 802.11 b/g/n and Bluetooth v4.2 BR/EDR + BLE.

  • 4 MB Flash: Onboard SPI flash for program and data storage.

  • Rich Peripheral Set: Up to 32 GPIOs, UART, SPI, I2C, I2S, PWM, ADC, DAC, and touch sensing.

  • Low-Power Modes: Deep-sleep support for battery-powered applications.

  • PCB Antenna: Onboard antenna for easy integration.

  • Wide Operating Range: 3.0–3.6 V supply, -40°C to +85°C operating temperature.

  • Development Ready: Supported by ESP-IDF and Arduino IDE.

Technical Specifications 

# Parameter Specification
1 Microcontroller ESP32-D0WDQ6, Xtensa dual-core 32-bit LX6
2 Clock Speed Up to 240 MHz
3 Flash Memory 4 MB (32 Mbit)
4 Wireless Wi-Fi 802.11 b/g/n, Bluetooth v4.2 BR/EDR + BLE
5 GPIO Count Up to 32 GPIOs (5 strapping)
6 Operating Voltage 3.0 – 3.6 V
7 Operating Temperature -40°C to +85°C
8 Dimensions 18 × 25.5 × 3.1 mm

Usage

Getting Started

  1. Install the Arduino IDE and add Espressif’s board manager URL in Preferences .

  2. Install the ESP32 platform via the Boards Manager .

  3. Connect the module to a USB-to-UART adapter (or a development board that hosts it) and select the correct port and board (e.g., “ESP32 Dev Module”) .

  4. Write and upload your sketch. If uploading fails, hold the BOOT button during the “Connecting…” phase .

Typical Applications

  • Smart home devices and IoT sensor hubs

  • Industrial automation and data logging

  • Audio streaming and voice encoding

  • Battery-powered remote monitoring

Notes for Business Buyers

  • Proven, widely documented platform with a large community.

  • Suitable for bulk purchasing for product development and deployment.

  • Supports both ESP-IDF and Arduino for flexible team workflows.

Q: What is the ESP32-WROOM-32 module used for?

It is a general-purpose Wi-Fi and Bluetooth MCU module for IoT applications, including smart home, industrial automation, and sensor networks .

Q: How much flash memory does it have?

The module includes 4 MB (32 Mbit) of SPI flash

Q: Is it compatible with the Arduino IDE?

Yes, it is supported through the Arduino-ESP32 core. You need to install the ESP32 board platform via the Boards Manager .

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

The ESP32-WROOM-32 uses the ESP32-D0WDQ6 chip, while the -32D uses the ESP32-D0WD. They are largely similar in function .

Q: How do I enter programming mode?

If using a bare module with a USB-UART adapter, connect GPIO0 to GND, reset the module, then release GPIO0. On development boards, this is handled by the BOOT button .

Q: What is the operating voltage?

The module operates from 3.0 to 3.6 V, with 3.3 V being the typical supply .

Q: Does it support low-power modes?

Yes, it supports Deep-sleep mode with current consumption as low as ~10 µA (RTC timer enabled) for battery-powered applications .

Q: What development environments are supported?

It supports Espressif’s ESP-IDF and the Arduino IDE (via the Arduino-ESP32 core) .

Q: Can I use an external antenna?

The standard ESP32-WROOM-32 uses an onboard PCB antenna. The ESP32-WROOM-32U variant uses a connector for an external antenna .

Q: Can I purchase in bulk for a product development project?

Yes, the module is suitable for both individual users and business purchasing, including product development and volume production.

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