Data Sheet

1. Overview

ESP32-WROOM-32D and ESP32-WROOM-32U are powerful, generic Wi-Fi+BT+BLE MCU modules that target

a wide variety of applications, ranging from low-power sensor networks to the most demanding tasks, such as

voice encoding, music streaming and MP3 decoding.

ESP32-WROOM-32U is different from ESP32-WROOM-32D in that ESP32-WROOM-32U integrates a U.FL con-

nector. For detailed information of the U.FL connector please see Chapter 10. Note that the information in this

data sheet is applicable to both modules. Any differences between them will be clearly specified in the course of

this document. Table 1 lists the difference between ESP32-WROOM-32D and ESP32-WROOM-32U.

Table 1: ESP32-WROOM-32D vs. ESP32-WROOM-32U

Module ESP32-WROOM-32D ESP32-WROOM-32U

Core ESP32-D0WD ESP32-D0WD

SPI flash 32 Mbits, 3.3 V 32 Mbits, 3.3 V

Crystal 40 MHz 40 MHz

Antenna onboard antenna

U.FL connector (which needs to be connected

to an external IPEX antenna)

Dimensions

(Unit: mm)

(18.00±0.10) × (25.50±0.10) × (3.10±0.10)

(See Figure 6 for details)

(18.00±0.10) × (19.20±0.10) × (3.20±0.10)

(See Figure 7 for details)

Schematics See Figure 3 for details. See Figure 4 for details.

At the core of the two modules is the ESP32-D0WD chip that belongs to the ESP32 series* of chips. The chip

embedded is designed to be scalable and adaptive. There are two CPU cores that can be individually controlled,

and the CPU clock frequency is adjustable from 80 MHz to 240 MHz. The user may also power off the CPU

and make use of the low-power co-processor to constantly monitor the peripherals for changes or crossing of

thresholds. ESP32 integrates a rich set of peripherals, ranging from capacitive touch sensors, Hall sensors, SD

card interface, Ethernet, high-speed SPI, UART, I²S and I²C.

Note:

* For details on the part numbers of the ESP32 family of chips, please refer to the document ESP32 Datasheet.

The integration of Bluetooth, Bluetooth LE and Wi-Fi ensures that a wide range of applications can be targeted,

and that the module is all-around: using Wi-Fi allows a large physical range and direct connection to the Internet

through a Wi-Fi router, while using Bluetooth allows the user to conveniently connect to the phone or broadcast

low energy beacons for its detection. The sleep current of the ESP32 chip is less than 5 µA, making it suitable

for battery powered and wearable electronics applications. The module supports a data rate of up to 150 Mbps,

and 20 dBm output power at the antenna to ensure the widest physical range. As such the module does offer

industry-leading specifications and the best performance for electronic integration, range, power consumption,

and connectivity.

The operating system chosen for ESP32 is freeRTOS with LwIP; TLS 1.2 with hardware acceleration is built in as

well. Secure (encrypted) over the air (OTA) upgrade is also supported, so that users can upgrade their products

even after their release, at minimum cost and effort.

Table 2 provides the specifications of ESP32-WROOM-32D and ESP32-WROOM-32U.

Espressif Systems 1 ESP32-WROOM-32D & ESP32-WROOM-32U Datasheet V1.8