What's New with ESP32?
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.
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.
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.
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
10x capacitive touch interface
32 kHz crystal oscillator
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
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.