The ESP32-WROOM-32UE is a general-purpose Wi-Fi + Bluetooth + Bluetooth LE MCU module from Espressif Systems, built around the ESP32-D0WD-V3 chip. This version features 8MB (64Mbit) of SPI flash paired with an external U.FL/IPEX antenna connector, making it the preferred choice for products housed in metal enclosures or any deployment where an onboard PCB antenna would be blocked or severely attenuated .
At the core of the module is a dual-core Xtensa 32-bit LX6 microprocessor running at up to 240 MHz. The two CPU cores can be individually controlled, and a low-power co-processor can monitor peripherals while the main cores are powered down — ideal for balancing performance and power consumption . The chip‘s sleep current is below 5 µA, making it suitable for battery-powered wearable electronics and low-power sensor networks.
The module supports Wi-Fi 802.11 b/g/n with data rates up to 150 Mbps and Bluetooth v4.2 BR/EDR + BLE. Antenna output power reaches up to 20 dBm, ensuring maximum wireless range when paired with a suitable external antenna . The compact form factor (18.0 × 19.2 × 3.2 mm) is smaller than the 32E variant due to the absence of the onboard antenna .
The ESP32-WROOM-32UE integrates a rich set of peripheral interfaces including SD card, UART, SPI, SDIO, I2C, LED PWM, motor PWM, I2S, IR, pulse counter, GPIO, capacitive touch sensor, ADC, DAC, and TWAI® (compatible with ISO 11898-1, i.e., CAN Specification 2.0) . It operates from 3.0 to 3.6 V with an operating temperature range of -40°C to +85°C . The module carries BQB Bluetooth certification, RF certifications (FCC/CE-RED/SRRC), and REACH/RoHS environmental compliance .
Product Status Note: The ESP32-WROOM-32UE is the current recommended replacement for the NRND (Not Recommended for New Designs) ESP32-WROOM-32U series. It uses the updated ESP32-D0WD-V3 chip and continues to receive manufacturing support . Espressif’s Longevity Commitment guarantees ESP32 series availability through January 1, 2031.
Development support is extensive, with official support for Espressif‘s ESP-IDF and the Arduino IDE through the Arduino-ESP32 core . The module is suitable for both individual makers and businesses purchasing for product development, smart home devices, industrial automation, and general-purpose IoT applications.
Features
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External U.FL/IPEX antenna connector — Ideal for metal enclosures and maximum-range applications
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ESP32-D0WD-V3 dual-core processor — Xtensa 32-bit LX6, up to 240 MHz, with adjustable frequency
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8MB SPI Flash — Expanded storage for firmware, OTA buffers, and data logging
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Integrated wireless — Wi-Fi 802.11 b/g/n (up to 150 Mbps) and Bluetooth v4.2 BR/EDR + BLE
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Ultra-low sleep current — Below 5 µA for battery-powered applications
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Rich peripheral set — SD card, UART, SPI, I2C, I2S, PWM, ADC, DAC, capacitive touch, TWAI® (CAN-compatible)
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Up to 26 GPIOs — Including 5 strapping pins
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Certified — BQB, RF (FCC/CE-RED/SRRC), and REACH/RoHS certified for international markets
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | Microcontroller | ESP32-D0WD-V3, Xtensa dual-core 32-bit LX6 |
| 2 | Clock Speed | 80 – 240 MHz |
| 3 | Flash Memory | 8 MB (64 Mbit) Quad SPI |
| 4 | Wireless | Wi-Fi 802.11 b/g/n (150 Mbps), Bluetooth v4.2 BR/EDR + BLE |
| 5 | Antenna | U.FL / IPEX external connector |
| 6 | Operating Voltage | 3.0 – 3.6 V |
| 7 | Operating Temperature | -40°C to +85°C |
| 8 | Dimensions | 18.0 × 19.2 × 3.2 mm |
