GPIO Pins of ESP32 | ESP32 Tutorials

In the post you can find GPIO pins of ESP32. 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 micro-controllers like the Arduino. This means that you can easily control and monitor devices remotely via Wi-Fi for a very low price.

ESP32 chip specifications –

  • The ESP32 is dual core, this means it has 2 processors.
  • It has Wi-Fi and bluetooth built-in.
  • It runs 32 bit programs.
  • The clock frequency can go up to 240MHz and it has a 512 kB RAM.
  • This particular board has 30 or 36 pins, 15 in each row.
  • It also has wide variety of peripherals available, like: capacitive touch, ADCs, DACs, UART, SPI, I2C and much more.
  • It comes with built-in hall effect sensor and built-in temperature sensor.

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

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.

If you’re familiar with the ESP8266, the ESP32 is its sucessor. The ESP32 is loaded with lots of new features. The most relevant: it combines WiFi and Bluetooth wireless capabilities and it’s dual core. Some Boards comes with LoRa such as WiFi LoRA 32 (V2) ESP32 | Overview | Introduction.

GPIO Pins of ESP32

The ESP32 has more GPIOs with more functionalities compared with the ESP826. With the ESP32 you can decide which pins are UART, I2C, or SPI – you just need to set that on the code. This is possible due to the ESP32 chip’s multiplexing feature that allows to assign multiple functions to the same pin. If you don’t set them on the code, the pins will be used as default

Version with 30 GPIOs

esp32 30 pin

Version with 36 GPIOs

GPIO Pins of ESP32

Do you know more about ESP32, click on link are as follows:

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Harshvardhan Mishra

Hi, I'm Harshvardhan Mishra. I am a tech blogger and an IoT Enthusiast. I am eager to learn and explore tech related stuff! also, I wanted to deliver you the same as much as the simpler way with more informative content. I generally appreciate learning by doing, rather than only learning. Thank you for reading my blog! Happy learning! Follow and send tweets me on @harshvardhanrvm. If you want to help support me on my journey, consider sharing my articles, or Buy me a Coffee!

One thought on “GPIO Pins of ESP32 | ESP32 Tutorials

  • 22nd December 2019 at 10:11 pm
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    Very nice article sir, keep it up.

    Reply

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