ESP32-WROOM-32 4MB Flash SMD Module – 32Mbit Dual-Core 2.4GHz WiFi & Bluetooth BLE Wireless Microcontroller SoC

ESP32-WROOM-32 4MB Module – High-Performance Dual-Core WiFi & BLE Embedded Wireless Subsystem

The ESP32-WROOM-32 4MB Module is a versatile, industry-standard surface-mount (SMD) wireless microcontroller unit engineered for commercial IoT products, smart home appliances, wearable electronics, and industrial automation networks across India.

Built around the powerful Espressif ESP32-D0WDQ6 system-on-chip, the ESP32-WROOM-32 4MB Module integrates dual-core 32-bit computing with full 2.4GHz Wi-Fi and Bluetooth Low Energy connectivity into a compact, pre-certified RF metal-shielded footprint.

This premium listing highlights the 32Mbit (4MB) SPI flash memory variant available at Virtual Pathshala. Featuring an integrated PCB trace antenna and 38 castellated edge pads, it allows rapid surface-mount reflow soldering directly onto your custom PCB carrier boards. Combine this wireless brain with our selection of Digital Environmental Sensors and compact 3.3V Low-Dropout Voltage Regulators.

Why Choose the Bare SMD Module Over Bulky Development Boards?

Standard plug-in breakout development boards add unnecessary bulk, consume excessive idle current through linear regulators, and inflate overall bill-of-materials costs in production runs.

The ESP32-WROOM-32 4MB Module eliminates that excess overhead. It lets engineers route only the specific GPIO pins, decoupling capacitors, and power circuits required for their custom product enclosure, achieving a minimal circuit profile and extended battery life.

Key Features of the ESP32-WROOM-32 4MB Module

1. High-Performance Dual-Core Xtensa LX6 Processing Core

The internal architecture of the ESP32-WROOM-32 4MB Module features two 32-bit Tensilica processors running up to 240MHz. It delivers up to 600 DMIPS of computing power, allowing one core to manage intensive Wi-Fi networking protocols while the second core runs sensor tracking algorithms.

2. Integrated 4MB (32Mbit) High-Speed SPI Flash Storage

Equipped with 4 Megabytes of external SPI flash memory, the ESP32-WROOM-32 4MB Module provides generous storage for expansive embedded firmware, complex graphics tables, and Over-The-Air (OTA) wireless update partitions.

3. Dual Wireless Connectivity (Wi-Fi 802.11 b/g/n & BLE 4.2)

The onboard hybrid radio handles classic Wi-Fi communication at data rates up to 150 Mbps alongside low-power Bluetooth 4.2. This dual-radio stack allows developers to configure devices locally from a smartphone app via BLE while streaming telemetry data to cloud brokers over Wi-Fi.

4. Comprehensive Hardware Peripherals & Castellated Edge Pads

The module breaks out 38 perimeter solder contacts with 1.27mm pitch spacing. It delivers access to capacitive touch sensors, high-resolution ADC channels, DAC outputs, hardware UARTs, SPI buses, I2C lines, and PWM motor drivers.

5. RF Shielded Casing with Integrated PCB Trace Antenna

The metal shield lid protects internal crystal oscillators and silicon dies from electromagnetic interference (EMI). The pre-tuned onboard meandered inverted-F antenna (MIFA) delivers reliable wireless range without requiring external antenna leads.

ESP32-WROOM-32 Module – Full Technical Specifications

Frequently Asked Questions – ESP32-WROOM-32 4MB Module

What power supply design is recommended for this bare SMD module?

When designing a custom carrier PCB for the ESP32-WROOM-32 4MB Module, ensure your 3.3V voltage regulator can source at least 500mA of continuous current. The internal radio draws rapid current pulses during Wi-Fi transmission bursts, so place a 10µF ceramic capacitor and a 0.1µF decoupling capacitor as close to the 3V3 input pad as possible to prevent brownouts.

How do I put the module into bootloader flashing mode on a custom PCB?

To flash firmware onto the module over UART, pull the **GPIO0** pin LOW while momentarily toggling the **EN (Enable/Reset)** pin LOW to ground. This forces the internal ROM into UART download mode, allowing your computer to program the 4MB flash memory via the TXD0 and RXD0 pins.

Can this module be programmed using the Arduino IDE and ESP-IDF?

Yes. The module is fully supported by the official Espressif Arduino Core, ESP-IDF framework, and MicroPython. Select “ESP32 Dev Module” as your board target inside the Arduino IDE to compile and upload sketches effortlessly.

Order Your ESP32-WROOM-32 4MB Module Online Today

Build professional commercial IoT products, custom industrial control hubs, and ultra-compact wearable devices with genuine Espressif silicon. Dispatched across all domestic Indian locations with fast express delivery options from Virtual Pathshala. For official hardware design guidelines, reference schematics, and RF layout rules, review the Component101 Electronics Engineering Portal.