IoT Researcher Blog

We Do IoT Right

What's New with ESP32?

31 October, 2016 | Internet Of Things

ESP32 is the latest addition to the ESPXX (ESP8266, etc) line of System on a Chip units designed by Espressif. It differs from its predecessors by having Bluetooth Low Energy (BLE) connectivity also combined into the same unit.

Pin Layout



Hybrid Wi-Fi & Bluetooth

ESP32 can perform as a complete standalone system or as a slave device to a host MCU to reduce communication stack overhead on the main application processor. ESP32 can interface with other systems to provide Wi-Fi and Bluetooth functionality through the SPI / SDIO or I2C / UART interfaces.

Ultra-Low Power Management

Engineered for mobile devices, wearable electronics and the Internet of Things (IoT) applications, ESP32 achieves ultra-low power consumption with a combination of several proprietary software. The state-of-the-art power saving features include fine resolution clock gating, power modes, and dynamic power scaling.

Robust Design

ESP32 is capable of functioning reliably in industrial environments with an operating temperature range of -40°C to +125°C. Powered by advanced calibration circuitries, ESP32 can dynamically adjust itself to remove external circuit imperfections or adapt to changes in external conditions.


Key Features

240 MHz dual core Tensilica LX6 microcontroller with 600 DMIPS

Integrated 520 KB SRAM

Integrated 802.11BGN HT40 Wi-Fi transceiver, baseband, stack and LWIP

Integrated dual mode Bluetooth (classic and BLE)

16 MByte flash

2.2V to 3.6V operating voltage

-40°C to +125°C operating temperature

On-board PCB antenna / IPEX connector for external antenna


Ultra-low noise analog amplifier

Hall sensor

10x capacitive touch interface

32 kHz crystal oscillator

32x GPIO

3 x UARTs, including hardware flow control

3 x SPI

2 x I2S

12 x ADC input channels

2 x DAC

2 x I2C

PWM/timer input/output availabe on every GPIO pin

OpenOCD debug interface with 32 kB TRAX buffer

SDIO master/slave 50 MHz

Supports external SPI flash up to 16 MB

SD-card interface support

Security Related

WEP, WPA/WPA2 PSK/Enterprise

Hardware accelerated encryption: AES / SHA2 / Elliptical Curve Cryptography / RSA-4096


Supports sniffer, station, softAP and Wi-Fi direct modes

Max data rate of 150 Mbps@11n HT40, 72 Mbps@11n HT20, 54 Mbps@11g, and 11 Mbps@11b

Maximum transmit power of 19.5 dBm@11b, 16.5 dBm@11g, 15.5 dBm@11n

Minimum receiver sensitivity of -98 dBm

135 Mbps UDP sustained throughput

2.5 μA deep sleep current

Arduino is in the process of writing a library for ESP32, which is almost complete with the help of Open Source community. This is something we all must eagerly look out for.