SKU: IOWC-1866
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SM-ESP32E Wi-Fi + Bluetooth Module w/ 4M 32Mbit Flash

₹309.00 (Inclusive of all taxes)
Out of Stock

The SM-ESP32E is a compact, ESP32-D0WD-V3-based Wi-Fi and Bluetooth 4.2 module featuring 4MB of external flash, a PCB antenna, and a rich set of hardware interfaces for IoT development with Arduino IDE, ESP-IDF, or MicroPython.

Features

  • Powered by the ESP32-D0WD-V3 dual-core Xtensa LX6 processor, clockable up to 240 MHz for demanding IoT tasks.
  • Integrates 802.11b/g/n Wi-Fi (up to 150 Mbps) and Bluetooth 4.2 BR/EDR + BLE for versatile wireless connectivity.
  • Includes 4MB of external SPI flash for application storage and 520KB of on-chip SRAM for data processing.
  • Features a comprehensive I/O set including UART, SPI, I2C, I2S, ADC, DAC, GPIO, and capacitive touch sensors.
  • Compact 20mm x 18mm form factor with an integrated PCB antenna for simplified board design and assembly.

Out of stock

Description

The SM-ESP32E module is a cost-effective, surface-mount solution built around Espressif’s ESP32-D0WD-V3 SoC. It provides robust dual-band 2.4GHz Wi-Fi and dual-mode Bluetooth connectivity, making it suitable for a broad spectrum of IoT applications from simple sensor nodes to more complex devices involving audio streaming or local AI inference. The module operates from a 3.3V supply and is designed for low-power operation, supporting various sleep modes to extend battery life in field deployments.

Its integrated PCB antenna simplifies RF design and reduces BOM cost, while the exposed peripheral interfaces allow direct connection to sensors, displays, and actuators. The module is fully supported by Espressif’s ESP-IDF framework, Arduino core, and MicroPython, offering a flexible development path for both rapid prototyping and volume production. The 4MB of external flash provides ample space for application code, file systems, and Over-The-Air (OTA) update capabilities.

Key Features

  • Dual-core 32-bit LX6 microprocessor with a maximum clock frequency of 240 MHz.
  • Integrated 802.11b/g/n Wi-Fi supporting Station, SoftAP, and Station+AP modes.
  • Bluetooth 4.2 compliant with both Classic (BR/EDR) and Low Energy (BLE) profiles.
  • On-board PCB antenna for 2.4GHz Wi-Fi and Bluetooth, eliminating the need for an external antenna connector.
  • Rich peripheral set including SPI, I2C, I2S, UART, ADC, DAC, GPIO, touch sensors, and PWM.
  • Low-power design with multiple sleep modes for battery-powered IoT applications.
  • Hardware-accelerated encryption (AES, SHA, RSA, ECC) for secure communications.
  • Compact SMD package (20mm x 18mm) ideal for space-constrained PCB designs.

Applications

  • Generic low-power IoT sensor hubs and data loggers.
  • Smart home automation devices (switches, sensors, controllers).
  • Industrial automation and wireless control systems.
  • Audio applications and voice-controlled assistants.
  • Wearable electronics and health monitoring devices.
  • Retail and point-of-sale (POS) wireless terminals.

Technical Specifications

Microcontroller/SoCESP32-D0WD-V3 (Xtensa Dual-Core 32-bit LX6)
Wireless ProtocolsWi-Fi 802.11b/g/n, Bluetooth v4.2 BR/EDR & BLE
Frequency Range2.412 - 2.484 GHz
RF Transmit PowerNot Specified
Supply Voltage3.0V - 3.6V DC
Operating Current~80 mA (Typical)
InterfacesUART, SPI, I2C, I2S, SDIO, GPIO, ADC, DAC, PWM, Touch
Antenna ConnectorIntegrated PCB Antenna
Operating TemperatureNot Specified
Dimensions20 mm (L) x 18 mm (W)

Frequently Asked Questions

What development frameworks are compatible with the SM-ESP32E module?

The module is fully compatible with Espressif's official ESP-IDF (IoT Development Framework), 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 its UART0 (TX/RX) pins, ensuring GPIO0 is pulled low during reset to enter bootloader mode. The standard baud rate for uploading is 115200.

How do I power the SM-ESP32E module and what are its power requirements?

Power the module via its 3.3V (VCC) and GND pins, strictly within the 3.0V to 3.6V operating range. A stable 3.3V regulator capable of supplying at least 500mA is recommended for reliable operation, especially during RF transmission peaks. For battery-powered projects, utilize the chip's deep sleep modes, which can reduce current consumption to microamps, significantly extending operational life.

Does the module support Over-The-Air (OTA) firmware updates?

Yes, the SM-ESP32E's 4MB of external flash provides ample space for implementing OTA updates. Using the ESP-IDF's native OTA routines or the Arduino OTA library, you can upload new firmware via Wi-Fi. This requires partitioning your flash to include an OTA data area and at least two application slots, which is configured in the project's partition table file during development.

Package Includes

  • 1 x SM-ESP32E Wi-Fi + Bluetooth Module

Additional Information

Weight 0.01 kg
Dimensions 2 × 1.8 cm