1. Overview

1. Overview

ESP32-WROOM-32 is a powerful, generic Wi-Fi+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.

At the core of this module is the ESP32-D0WDQ6 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 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 1 provides the specifications of ESP32-WROOM-32.

Table 1: ESP32-WROOM-32 Specifications

Categories

Items

Specifications

Certification

RF certification

FCC/CE-RED/IC/TELEC/KCC/SRRC/NCC

Wi-Fi certification

Wi-Fi Alliance

Bluetooth certification

BQB

Green certification

RoHS/REACH

Test

Reliablity

HTOL/HTSL/uHAST/TCT/ESD

Wi-Fi

Protocols

802.11 b/g/n (802.11n up to 150 Mbps)

A-MPDU and A-MSDU aggregation and 0.4 µs guard interval

support

Frequency range

2.4 GHz

~ 2.5 GHz

Bluetooth

Protocols

Bluetooth v4.2 BR/EDR and BLE specification

Radio

NZIF receiver with –97 dBm sensitivity

Class-1, class-2 and class-3 transmitter

AFH

Espressif Systems

1

ESP32-WROOM-32 Datasheet V2.9