ESP32 is a series of low-cost, low-power system on a chip microcontrollers with integrated Wi-fi and dual-mode Bluetooth .It�s high processing power with in-built Wi-Fi / Bluetooth and Deep Sleep Operating capabilities makes it ideal for most Portable IoT devices. Also now, since Arduino IDE has officially released board managers for ESP32 it has become very easy to program these devices.

Difference between ESP32 and ESP8266

Both the ESP32 and ESP8266 are Wi-Fi development boards from Espressif systems. They can be programmed using the ESP-IDF or the Arduino IDE. The ESP8266 is inferior in terms of performance compared with the ESP32, but it is cheaper and has smaller form factor then the ESP32. Also the ESP8266 was launched into the market earlier then ESP32 so you will get enough community support for ESP8266.

The main difference would be that ESP8266 does not have an in-built Bluetooth module and also does not feature CAN protocol and has no SRAM. So if you project requires more processing power with Bluetooth or CAN functionalities then you can prefer ESP32 over ESP8266.

Specifications

• Microprocessor:Tensilica Xtensa LX6


• Voltage:3.3V


• Analog input pins:12-bit, 18 Channel


• DAC Pins:8-bit, 2 Channel


• Digital I/O Pins:39 (of which 34 is normal GPIO pin)


• DC Current on I/O Pins:40mA


• DC Current on 3.3V Pin:50mA


• SRAM:520KB


• Communication:SPI(4), I2C(2), I2S(2), CAN, UART(3)


• Wi-Fi:11 b/g/n


• Bluetooth:2 � Supports BLE and Classic Bluetooth