ESP32 vs ESP8266 | What is ESP32 and ESP8266

In this post we’re going to talk about ESP32 vs ESP8266 and  What is ESP32 and ESP8266. Esp32 And ESP8266 both most popular development boards. ESP32 and ESP8266 are cheap Wi-Fi modules perfectly suited for DIY projects in the Internet of Things (IoT) field. These modules come with GPIOs, support for a variety of protocols like SPI, I2C, UART, and more. The best part is that they come with wireless networking included, which makes them apart from other microcontrollers like the Arduino. This means that you can easily control and monitor devices remotely via Wi-Fi for a very low price.

If you want read more about ESP8266, click here – IoT with ESP8266.

Specs: ESP32 vs ESP8266

Here you can see a table that adapted by AMICA IO. This table shows main differences between the ESP8266 and the ESP32 processors (table adapted from: AMICA_IO).

	ESP8266	ESP32
MCU	Xtensa Single-core 32-bit L106	Xtensa Dual-Core 32-bit LX6 with 600 DMIPS
802.11 b/g/n Wi-Fi	HT20	HT40
Bluetooth	X	Bluetooth 4.2 and BLE
Typical Frequency	80 MHz	160 MHz
SRAM	X	✓
Flash	X	✓
GPIO	17	36
Hardware /Software PWM	None / 8 channels	None / 16 channels
SPI/I2C/I2S/UART	2/1/2/2	4/2/2/2
ADC	10-bit	12-bit
CAN	X	✓
Ethernet MAC Interface	X	✓
Touch Sensor	X	✓
Temperature Sensor	X	✓
Hall effect sensor	X	✓
Working Temperature	-40ºC to 125ºC	-40ºC to 125ºC
Price	$ (3$ – $6)	$$ ($6 – $12)
Where to buy	NodeMCU ESP8266 Wifi Development Board – Amica	ESP32 Development Board CP2102 WiFi Bluetooth

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More GPIOs on the ESP32

ESP32 gives more pins than ESP8266 and and you can decide which pins are UART, I2C, or SPI.

ESP32 DEVKIT V1 – DOIT Version with 36 Pins

You can set PWM signals in any GPIO with configurable frequencies and duty cycles set on the code. When it comes to the analog pins, these are static, but the ESP32 supports measurements on 18 channels (analog-enabled pins) versus one 10-bit ADC pin on the ESP8266. The ESP32 also supports two 8-bit DAC channels. Additionally, the ESP32 contains 10 capacitive sensing GPIOs, that detect touch and can be used to trigger events, or wake-up the ESP32 from deep sleep, for example.

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