ESP32-DevKitM-1

[中文]

This user guide will help you get started with ESP32-DevKitM-1 and will also provide more in-depth information.

ESP32-DevKitM-1 is an ESP32-MINI-1(1U)-based development board produced by Espressif. Most of the I/O pins are broken out to the pin headers on both sides for easy interfacing. Users can either connect peripherals with jumper wires or mount ESP32-DevKitM-1 on a breadboard.

ESP32-DevKitM-1 - front

ESP32-DevKitM-1 - isometric

ESP32-DevKitM-1 - front

ESP32-DevKitM-1 - isometric

The document consists of the following major sections:

  • Getting started: Provides an overview of the ESP32-DevKitM-1 and hardware/software setup instructions to get started.

  • Hardware reference: Provides more detailed information about the ESP32-DevKitM-1’s hardware.

  • Related Documents: Gives links to related documentaiton.

Getting Started

This section describes how to get started with ESP32-DevKitM-1. It begins with a few introductory sections about the ESP32-DevKitM-1, then Section Start Application Development provides instructions on how to do the initial hardware setup and then how to flash firmware onto the ESP32-DevKitM-1.

Overview

This is a small and convenient development board that features:

  • ESP32-MINI-1, or ESP32-MINI-1U module

  • USB-to-serial programming interface that also provides power supply for the board

  • pin headers

  • pushbuttons for reset and activation of Firmware Download mode

  • a few other components

Contents and Packaging

Retail orders

If you order a few samples, each ESP32-DevKitM-1 comes in an individual package in either antistatic bag or any packaging depending on your retailer.

For retail orders, please go to https://www.espressif.com/en/contact-us/get-samples.

Wholesale Orders

If you order in bulk, the boards come in large cardboard boxes.

For wholesale orders, please go to https://www.espressif.com/en/contact-us/sales-questions.

Description of Components

The following figure and the table below describe the key components, interfaces and controls of the ESP32-DevKitM-1 board. We take the board with a ESP32-MINI-1 module as an example in the following sections.

ESP32-DevKitM-1 - front

ESP32-DevKitM-1 - front

Key Component

Description

On-board module

ESP32-MINI-1 module or ESP32-MINI-1U module. ESP32-MINI-1 comes with an on-board PCB antenna. ESP32-MINI-1U comes with an external antenna connector. The two modules both have a 4 MB flash in chip package. For details, please see ESP32-MINI-1 & ESP32-MINI-1U Datasheet.

5 V to 3.3 V LDO

Power regulator converts 5 V to 3.3 V.

Boot Button

Download button. Holding down Boot and then pressing Reset initiates Firmware Download mode for downloading firmware through the serial port.

Reset Button

Reset Button

Micro-USB Port

USB interface. Power supply for the board as well as the communication interface between a computer and the ESP32 chip.

USB-to-UART Bridge

Single USB-UART bridge chip provides transfer rates up to 3 Mbps.

3.3 V Power On LED

Turns on when the USB is connected to the board. For details, please see the schematics in Related Documents.

I/O Connector

All available GPIO pins (except for the SPI bus for flash) are broken out to the pin headers on the board. Users can program ESP32 chip to enable multiple functions.

Start Application Development

Before powering up your ESP32-DevKitM-1, please make sure that it is in good condition with no obvious signs of damage.

Required Hardware

  • ESP32-DevKitM-1

  • USB 2.0 cable (Standard-A to Micro-B)

  • Computer running Windows, Linux, or macOS

Software Setup

Please proceed to Get Started, where Section Installation will quickly help you set up the development environment and then flash an application example onto your ESP32-DevKitM-1.

Attention

ESP32-DevKitM-1 boards manufactured before December 2, 2021 have a single core module installed. To verify what module you have, please check module marking information in PCN-2021-021 . If your board has a single core module installed, please enable single core mode (CONFIG_FREERTOS_UNICORE) in menuconfig before flashing your applications.

Hardware Reference

Block Diagram

A block diagram below shows the components of ESP32-DevKitM-1 and their interconnections.

ESP32-DevKitM-1

ESP32-DevKitM-1

Power Source Select

There are three mutually exclusive ways to provide power to the board:

  • Micro USB port, default power supply

  • 5V and GND header pins

  • 3V3 and GND header pins

Warning

  • The power supply must be provided using one and only one of the options above, otherwise the board and/or the power supply source can be damaged.

  • Power supply by micro USB port is recommended.

Pin Descriptions

The table below provides the Name and Function of pins on both sides of the board. For peripheral pin configurations, please refer to ESP32 Datasheet.

No.

Name

Type

Function

1

GND

P

Ground

2

3V3

P

3.3 V power supply

3

I36

I

GPIO36, ADC1_CH0, RTC_GPIO0

4

I37

I

GPIO37, ADC1_CH1, RTC_GPIO1

5

I38

I

GPIO38, ADC1_CH2, RTC_GPIO2

6

I39

I

GPIO39, ADC1_CH3, RTC_GPIO3

7

RST

I

Reset; High: enable; Low: powers off

8

I34

I

GPIO34, ADC1_CH6, RTC_GPIO4

9

I35

I

GPIO35, ADC1_CH7, RTC_GPIO5

10

IO32

I/O

GPIO32, XTAL_32K_P (32.768 kHz crystal oscillator input), ADC1_CH4, TOUCH9, RTC_GPIO9

11

IO33

I/O

GPIO33, XTAL_32K_N (32.768 kHz crystal oscillator output), ADC1_CH5, TOUCH8, RTC_GPIO8

12

IO25

I/O

GPIO25, DAC_1, ADC2_CH8, RTC_GPIO6, EMAC_RXD0

13

IO26

I/O

GPIO26, DAC_2, ADC2_CH9, RTC_GPIO7, EMAC_RXD1

14

IO27

I/O

GPIO27, ADC2_CH7, TOUCH7, RTC_GPIO17, EMAC_RX_DV

15

IO14

I/O

GPIO14, ADC2_CH6, TOUCH6, RTC_GPIO16, MTMS, HSPICLK, HS2_CLK, SD_CLK, EMAC_TXD2

16

5V

P

5 V power supply

17

IO12

I/O

GPIO12, ADC2_CH5, TOUCH5, RTC_GPIO15, MTDI, HSPIQ, HS2_DATA2, SD_DATA2, EMAC_TXD3

18

IO13

I/O

GPIO13, ADC2_CH4, TOUCH4, RTC_GPIO14, MTCK, HSPID, HS2_DATA3, SD_DATA3, EMAC_RX_ER

19

IO15

I/O

GPIO15, ADC2_CH3, TOUCH3, RTC_GPIO13, MTDO, HSPICS0, HS2_CMD, SD_CMD, EMAC_RXD3

20

IO2

I/O

GPIO2, ADC2_CH2, TOUCH2, RTC_GPIO12, HSPIWP, HS2_DATA0, SD_DATA0

21

IO0

I/O

GPIO0, ADC2_CH1, TOUCH1, RTC_GPIO11, CLK_OUT1, EMAC_TX_CLK

22

IO4

I/O

GPIO4, ADC2_CH0, TOUCH0, RTC_GPIO10, HSPIHD, HS2_DATA1, SD_DATA1, EMAC_TX_ER

23

IO9

I/O

GPIO9, HS1_DATA2, U1RXD, SD_DATA2

24

IO10

I/O

GPIO10, HS1_DATA3, U1TXD, SD_DATA3

25

IO5

I/O

GPIO5, HS1_DATA6, VSPICS0, EMAC_RX_CLK

26

IO18

I/O

GPIO18, HS1_DATA7, VSPICLK

27

IO23

I/O

GPIO23, HS1_STROBE, VSPID

28

IO19

I/O

GPIO19, VSPIQ, U0CTS, EMAC_TXD0

29

IO22

I/O

GPIO22, VSPIWP, U0RTS, EMAC_TXD1

30

IO21

I/O

GPIO21, VSPIHD, EMAC_TX_EN

31

TXD0

I/O

GPIO1, U0TXD, CLK_OUT3, EMAC_RXD2

32

RXD0

I/O

GPIO3, U0RXD, CLK_OUT2

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