esp32 wroom 32 – universal wi fi + bluetooth® + bluetooth le mcu module

ESP32-WROOM-32 – Universal WiFi + Bluetooth® + Bluetooth LE MCU Module

Key features:

  • Xtensa® dual-core 32-bit LX6 processor, up to 240 MHz
  • 4 MB SPI flash, 520 KB SRAM
  • 2.4 GHz Wi-Fi 802.11b/g/n (150 Mbps)
  • Bluetooth v4.2 BR/EDR + BLE
  • Up to 32 GPIO pins
  • Rich peripherals
  • On-board PCB antenna
  • Operating voltage: 3.0V – 3.6V
  • Operating temperature: -40°C to +85°C
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The ESP32-WROOM-32 is a powerful, generic Wi-Fi + Bluetooth + Bluetooth LE MCU module from Espressif Systems, designed for a wide variety of applications ranging from low-power sensor networks to demanding tasks such as voice encoding, music streaming, and MP3 decoding .

The module integrates the ESP32-D0WDQ6 chip, which features a dual-core Xtensa® 32-bit LX6 microprocessor with a clock frequency adjustable from 80 MHz to 240 MHz . The two CPU cores can be individually controlled, allowing flexible power management. The module includes 4 MB of SPI flash memory and 520 KB of on-chip SRAM, providing sufficient resources for complex embedded applications .

For wireless connectivity, the module supports 2.4 GHz Wi-Fi 802.11b/g/n with data rates up to 150 Mbps and Bluetooth v4.2 BR/EDR + Bluetooth LE . It can operate in Station mode, SoftAP mode, or a combination of both.

Note: Espressif has declared the ESP32-WROOM-32 as Not Recommended for New Designs (NRND) . For new projects, it is recommended to use the newer versions ESP32-WROOM-32Eor ESP32-WROOM-32UE, which offer improved features including optional PSRAM, higher flash capacity options (up to 16 MB), and extended temperature versions up to 105°C

Parameters

Parameters Specifications
Manufacturer Espressif Systems
Part Number ESP32-WROOM-32
SoC ESP32-D0WDQ6
Core Xtensa® dual-core 32-bit LX6
Maximum Frequency Up to 240 MHz
ROM 448 KB
SRAM 520 KB
RTC SRAM 8 KB
Flash Memory 4 MB (SPI)
Wi-Fi Protocol 802.11b/g/n (2.4 GHz)
Wi-Fi Data Rate Up to 150 Mbps
Bluetooth v4.2 BR/EDR + BLE
GPIO Up to 32
Peripherals SD card, UART, SPI, SDIO, I2C, LED PWM, Motor PWM,
I2S, IR, pulse counter, capacitive touch sensor, ADC, DAC,
TWAI® (CAN 2.0)
Crystal Oscillator 40 MHz
Antenna On-board PCB antenna
Operating Voltage 3.0V – 3.6V
Operating Temperature -40°C to +85°C
Package Size 18.0 mm × 25.5 mm × 3.1 mm
RoHS Compliant Yes

Applications

  • Smart home and building automation

  • Industrial automation and control systems

  • Low-power IoT sensor hubs and data loggers

  • Voice encoding, music streaming, and MP3 decoding

  • Wearable electronics and consumer products

  • Medical and healthcare devices

  • Smart agriculture and environmental monitoring

  • POS machines and service robots

  • Camera video streaming

  • Speech and image recognition

  • Audio devices

Note: For new designs requiring Wi-Fi + Bluetooth connectivity, it is recommended to use the successor modules ESP32-WROOM-32E (PCB antenna) or ESP32-WROOM-32UE (external antenna connector), which offer additional flash options (4/8/16 MB), optional PSRAM (2 MB), and extended temperature options up to 105°C .

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