The ESP32-WROOM-32E is a general-purpose Wi-Fi + Bluetooth + Bluetooth LE MCU module from Espressif Systems, built around the ESP32-D0WD-V3 chip. This version features 16MB (128Mbit) of SPI flash — the maximum storage capacity available for the WROOM-32E series — paired with an onboard PCB antenna, making it a complete, ready-to-integrate solution for a wide range of IoT applications.
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 . The compact form factor (18.0 × 25.5 × 3.1 mm) and onboard PCB antenna make it easy to embed into space-constrained designs without external antenna components .
The ESP32-WROOM-32E 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, and carries BQB Bluetooth certification, FCC/CE-RED/SRRC RF certification, and REACH/RoHS environmental certification .
The 16MB flash configuration is ideal for applications requiring extensive firmware images, large OTA update buffers, or substantial data storage for logging, configuration files, and multimedia content.
Product Status Note: The ESP32-WROOM-32E is the current recommended replacement for the NRND (Not Recommended for New Designs) ESP32-WROOM-32D series. It uses the updated ESP32-D0WD-V3 chip and continues to receive manufacturing support .
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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ESP32-D0WD-V3 dual-core processor — Xtensa 32-bit LX6, up to 240 MHz, with adjustable frequency
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16MB SPI Flash — Maximum storage capacity for the WROOM-32E series, ideal for complex firmware and data logging
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Onboard PCB antenna — Meandered Inverted-F Antenna for easy integration without external components
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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, 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 | 16 MB (128 Mbit) Quad SPI |
| 4 | Wireless | Wi-Fi 802.11 b/g/n (150 Mbps), Bluetooth v4.2 BR/EDR + BLE |
| 5 | Antenna | Onboard PCB antenna |
| 6 | Operating Voltage | 3.0 – 3.6 V |
| 7 | Operating Temperature | -40°C to +85°C |
| 8 | Dimensions | 18.0 × 25.5 × 3.1 mm |
