ESP8266 ESP-32

The Espressif ESP-32S is a powerful WiFi+BT 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 chip, which is designed to be scalable and adaptive. There are 2 CPU cores that can be individually controlled or powered, and the 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 coprocessor 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, low noise sense amplifiers, SD card interface, Ethernet, high-speed SDIO/SPI, UART, I2S and I2C.

It can be easily integrated into resource-limited devices due to its small form factor of only 18mm x 25.5mm.

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
• Dimensions: 18mm x 25.5mm x 83.3mm

 Sensors:

• Ultra-low noise analog amplifier
• Hall sensor
• 10x capacitive touch interface
• 32 kHz crystal oscillator

 Peripherals:

• 32 x general purpose I/O
• 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 available on every GPIO pin
• OpenOCD debug interface with 32 kB TRAX buffer
• SDIO master/slave 50 MHz
• SD-card interface support

• WEP, WPA/WPA2 PSK/Enterprise
• Hardware accelerated encryption: AES / SHA2 / Elliptical Curve Cryptography / RSA-4096

 Performance:

• 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

You can find more information about the ESP-32 from espressif.com and www.esp32.com