User's Manual

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Table Of Contents

PRELIMINARY

1. Overview

ESP32-WROOM-32E is

a powerful, generic WiFi-BT-BLE MCU module that targets 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.

This is a SMD Module with 2.4 GHz PCB antenna on board. It reserves π tuning circuit for antenna

impedance matching. It is with all GPIOs on the pin-out except the ones already used for connecting flash.

The Module's working voltage can be range from 3.0 V to 3.6 V. Frequency range is 2400 MHz to 2483.5

MHz. External 40 MHz as clock source for system. There is also a 4 MB SPI flash for storing user programs

and data.

The ordering information of ESP32-WROOM-32E is listed as follows:

Table 1: ESP32-WROOM-32E Ordering Information

Module

Chip embedded

Flash

PSRAM

Module dimensions (mm)

ESP32-WROOM-32E

ESP32-D0WD-

4 MB

(18.00 ± 0.10) X (25.50 ± 0.10) X

(3.10 ± 0.10) mm (including metallic

shield)

Notes:

ESP32-WROOM-32E (PCB) with 8 MB flash or 16 MB flash is available for custom order.

For detailed ordering information, please see Espressif Product Ordering Information.

For dimensions of the IPEX connector, please see Chapter 10.

At the core of the module is the ESP32-D0WD-V3 chip*. 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 A, making

it suitable for battery powered and wearable electronics applications. The module supports a data rate of up

to 150 Mbps, As such the module does offer industry-leading spec

ifications 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-32E.

Espressif Systems

ESP32-WROOM-32E User Manual