ESP32-WROOM-32D 4M 32Mbit Flash WiFi Bluetooth Module
ESP32-WROOM-32D 4M 32Mbit Flash WiFi Bluetooth Module - Image 2
SKU: IOWC-1869
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ESP32-WROOM-32D 4M 32Mbit Flash WiFi Bluetooth Module

₹279.00 (Inclusive of all taxes)
Out of Stock

The ESP32-WROOM-32D is a dual-core Wi-Fi and Bluetooth 4.2 module based on Espressif’s ESP32-D0WD SoC, featuring 4MB of flash memory. It provides robust 802.11 b/g/n connectivity and BLE for IoT applications, programmable via Arduino IDE, ESP-IDF, or MicroPython.

Features

  • Dual-core Xtensa LX6 processor with 520KB SRAM and 4MB flash for complex IoT firmware.
  • Integrated 2.4GHz Wi-Fi (802.11 b/g/n) supporting Station, SoftAP, and P2P modes for flexible network topologies.
  • Bluetooth 4.2 with Classic (BR/EDR) and Low Energy (BLE) support for dual-mode wireless connectivity.
  • Extensive peripheral set includes GPIO, ADC, DAC, SPI, I2C, I2S, PWM, touch sensors, and SD card interface.
  • Low operating voltage range (2.2V to 3.6V) and power management for battery-powered sensor nodes.

Out of stock

Description

The ESP32-WROOM-32D is a highly integrated, production-ready wireless module built around the ESP32-D0WD dual-core microcontroller. It combines Wi-Fi, Bluetooth, and ample processing power in a compact 18mm x 20mm form factor, making it a cornerstone for scalable IoT deployments. The module’s 4MB of flash memory provides sufficient space for application code, file systems, and Over-The-Air (OTA) updates.

Engineered for reliability, the module supports a wide array of network protocols including TCP/IP, SSL, HTTP, and MQTT out of the box. Its rich set of hardware interfaces—from SPI and I2C to capacitive touch and Hall-effect sensors—enables direct connection to sensors, actuators, and displays without external glue logic. The integrated power management unit and multiple sleep modes (including Deep-sleep) are critical for designing long-lasting, battery-operated field devices.

Key Features

  • Dual-core 32-bit LX6 microprocessor for high-performance computing and real-time tasks.
  • Integrated 4MB SPI flash memory for application firmware and data storage.
  • Complete Wi-Fi stack supporting 802.11 b/g/n protocols with security (WPA/WPA2).
  • Dual-mode Bluetooth 4.2 for both classic data streaming and Bluetooth Low Energy beaconing.
  • Comprehensive peripheral support including 12-bit ADC, 8-bit DAC, and touch-capable GPIOs.
  • Robust security features with hardware acceleration for AES, SHA, RSA, and ECC algorithms.
  • Low-power operating modes to minimize current consumption in battery-powered applications.
  • Directly programmable using popular frameworks like Arduino Core for ESP32, ESP-IDF, and MicroPython.

Applications

  • Smart home automation hubs and connected sensor nodes.
  • Industrial IoT (IIoT) for wireless data logging and machine monitoring.
  • Wearable devices and personal electronics with BLE connectivity.
  • Voice-controlled assistants and audio streaming applications.
  • Prototyping and product development for Wi-Fi/BLE enabled devices.

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 Range2.4GHz ISM Band
Flash Memory4 MB (32 Mbit)
SRAM520 KB
ROM448 KB
Supply Voltage2.2V - 3.6V
Operating Current~80 mA (average during RF transmission)
InterfacesGPIO, SPI, I2C, I2S, UART, SDIO, PWM, ADC, DAC, Touch Sensor
Antenna ConnectorIntegrated PCB Trace Antenna
Operating Temperature-40°C to +85°C (typical)
Dimensions18mm (W) x 20mm (L)

Frequently Asked Questions

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

The primary difference is the antenna connection. The ESP32-WROOM-32D uses an integrated PCB trace antenna, while the ESP32-WROOM-32U variant features a U.FL (IPEX) connector for attaching an external antenna. This allows for greater flexibility in placement and potentially improved range with a high-gain antenna in the -32U model. Both share identical core specifications including the dual-core processor, memory, and wireless capabilities.

How do I program the ESP32-WROOM-32D module?

You can program it using several development frameworks. The most common method is the Arduino IDE with the ESP32 board package installed via the Boards Manager. For low-level control, Espressif's official ESP-IDF framework is used. You'll need a USB-to-Serial adapter (like an FTDI board) to connect the module's UART pins (TX, RX, EN, GPIO0) to your computer for flashing and serial communication. Ensure GPIO0 is pulled low during reset to enter bootloader mode.

What is the power consumption and how can I optimize it for battery use?

The module consumes roughly 80mA during active RF transmission but offers several power-saving modes. In Deep-sleep mode, current draw can drop to around 10µA, with the RTC memory and GPIO wake-up capabilities preserved. To maximize battery life, design your firmware to spend most of its time in Deep-sleep, waking periodically to read sensors and transmit data. Use the built-in WiFi modem sleep modes and adjust the CPU frequency dynamically based on task requirements.

Package Includes

  • 1 x ESP32-WROOM-32D 4MB Flash WiFi Bluetooth Module

Additional Information

Weight 0.01 kg
Dimensions 2 × 1.8 cm

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