This tutorial explains the ESP32 pinout in detail. ESP32 is a microcontroller board that has a number of GPIO pins for several functions or purposes. These pins are specified for a specific function, and some pins already have fixed functionality. The ESP32 microcontroller has a greater number of pins when compared to the ESP8266 or Arduino UNO boards. Knowledge about the pins is essential to start working with ESP32. The main goal of this tutorial is to discuss detailed pin descriptions, functionality, and purpose.
To know about pin detail, we read summarized information about the ESP32 board.
Introduction to ESP32
- ESP32 is the most popular IoT-based microcontroller.
- The main part of the ESP32 microcontroller board is a Tensilica LX6 chip designed by Espresso Systems.
- It consists of a dual-core processor, and each core can be controlled separately.
- A total of 48 pins are present in the ESP32 chip; however, not all these pins are exposed to users.
- The ESP32 Microcontroller comes in two different versions: 30 and 36 pins.
- Its frequency starts from 80 MHz and goes up to 240 MHz.
- Ultra-low power co-processor consumption is a main capability that saves a large amount of power using very little power while the main processor is OFF.
- It contains onboard WiFi and a dual Bluetooth module.
- ESP32 is cheaper than other microcontrollers.
ESP32 Pinout
The ESP32 microcontroller has multiple variants that differ in functionality, shape, and purpose. In this article, we are going to cover the detailed pinout of the 30-pin ESP32 board that comes with the ESP32-WROOM-32 microcontroller. It is also called WROOM32.
The ESP32 chip has a total of 48 pins, and 30 pins are exposed to the user, while 18 pins are integrated inside the microcontroller. Some ESP32 boards contain six extra integrated SPI flash pins, so these boards are called 36-pin boards.
ESP32 30-Pin Version Board
The below image represents the detailed pinout of the ESP32 30-pin variant containing all its peripherals, which we discuss one by one in detail.
Peripherals inside ESP32 30 Pins
- A total of 48 pins 30 pins are exposed to the user; 18 pins are for communication purposes.
- ADC pins are 18 and 12 bits.
- Two 8-bit DAC pins
- PWM channels are 16
- 10 Capacitive Touch Pins
- 3 UART
- 2 I2C
- 1 CAN
- 2 I2S
- 3SPI
This variant contains a total of 48 pins, out of which only 30 pins are available for external interfacing; the remaining 18 pins are integrated inside the chip for communication purposes.