ESP32-DevKitS(-R)

[中文]

This user guide provides information on ESP32-DevKitS(-R), an ESP32-based flashing board produced by Espressif. ESP32-DevKitS(-R) is a combination of two board names: ESP32-DevKitS and ESP32-DevKitS-R. S stands for springs, and R stands for WROVER.

ESP32-DevKitS

ESP32-DevKitS-R

ESP32-DevKitS

ESP32-DevKitS-R

The document consists of the following major sections:

  • Getting Started: Provides an overview of ESP32-DevKitS(-R) and hardware/software setup instructions to get started.

  • Hardware Reference: Provides more detailed information about ESP32-DevKitS(-R)’s hardware.

  • Related Documents: Gives links to related documentation.

Getting Started

This section describes how to get started with ESP32-DevKitS(-R). It begins with a few introductory sections about ESP32-DevKitS(-R), then Section How to Flash a Board provides instructions on how to mount a module onto ESP32-DevKitS(-R), get it ready, and flash firmware onto it.

Overview

ESP32-DevKitS(-R) is Espressif’s flashing board designed specifically for ESP32. It can be used to flash an ESP32 module without soldering the module to the power supply and signal lines. With a module mounted, ESP32-DevKitS(-R) can also be used as a mini development board like ESP32-DevKitC.

ESP32-DevKitS and ESP32-DevKitS-R boards vary only in layout of spring pins to fit the following ESP32 modules.

  • ESP32-DevKitS:
    • ESP32-WROOM-32

    • ESP32-WROOM-32D

    • ESP32-WROOM-32U

    • ESP32-SOLO-1

    • ESP32-WROOM-32E

    • ESP32-WROOM-32UE

  • ESP32-DevKitS-R:
    • ESP32-WROVER (PCB & IPEX)

    • ESP32-WROVER-B (PCB & IPEX)

    • ESP32-WROVER-E

    • ESP32-WROVER-IE

For information about above modules, please refer to ESP32 Series Modules.

Description of Components

ESP32-DevKitS - front

ESP32-DevKitS - front

ESP32-DevKitS-R - front

ESP32-DevKitS-R - front

Key Component

Description

Spring Pins

Click the module in. The pins will fit into the module’s castellated holes.

2.54 mm Female Headers

These female headers are connected to pins of the module mounted on this board. For description of female headers, please refer to Header Blocks.

USB-to-UART Bridge

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

LDO

5V-to-3.3V low-dropout voltage regulator (LDO).

Micro-USB Connector/Micro USB Port

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

EN Button

Reset button.

Boot Button

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

Power On LED

Turns on when the USB or power supply is connected to the board.

How to Flash a Board

Before powering up your ESP32-DevKitS(-R), please make sure that it is in good condition with no obvious signs of damage.

Required Hardware

  • An ESP32 module of your choice

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

  • Computer running Windows, Linux, or macOS

Hardware Setup

Please mount a module of your choice onto your ESP32-DevKitS(-R) according to the following steps:

  • Gently put your module on the ESP32-DevKitS(-R) board. Make sure that castellated holes on your module are aligned with spring pins on the board.

  • Press your module down into the board until it clicks.

  • Check whether all spring pins are inserted into castellated holes. If there are some misaligned spring pins, place them into castellated holes with tweezers.

Software Setup

Preferred Method

The ESP-IDF development framework provides a preferred way of flashing binaries onto ESP32-DevKitS(-R). Please proceed to Get Started, where Section Installation Step by Step will quickly help you set up the development environment and then flash an application example onto your ESP32-DevKitS(-R).

Alternative Method

As an alternative, Windows users can flash binaries using the Flash Download Tool. Just download it, unzip it, and follow the instructions inside the doc folder.

Note

  1. To flash binary files, ESP32 should be set to Firmware Download mode. This can be done either by the flash tool automatically, or by holding down the Boot button and tapping the EN button.

  2. After flashing binary files, the Flash Download Tool restarts your ESP32 module and boots the flashed application by default.

Board Dimensions

ESP32-DevKitS

ESP32-DevKitS board dimensions - back

ESP32-DevKitS-R

ESP32-DevKitS-R board dimensions - back

Contents and Packaging

Retail orders

If you order a few samples, each ESP32-DevKitS(-R) comes in an individual package in either antistatic bag or any packaging depending on a retailer.

For retail orders, please go to https://www.espressif.com/en/company/contact/buy-a-sample.

Wholesale Orders

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

For wholesale orders, please check Espressif Product Ordering Information (PDF).

Hardware Reference

Block Diagram

A block diagram below shows the components of ESP32-DevKitS(-R) and their interconnections.

ESP32-DevKitS(-R) - block diagram (click to enlarge)

ESP32-DevKitS(-R) (click to enlarge)

Power Supply Options

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

It is advised to use the first option: micro USB port.

Header Blocks

.

Label

Signal

L1

3V3

VDD 3V3

L2

EN

CHIP_PU

L3

VP

SENSOR_VP

L4

VN

SENSOR_VN

L5

34

GPIO34

L6

35

GPIO35

L7

32

GPIO32

L8

33

GPIO33

L9

25

GPIO25

L10

26

GPIO26

L11

27

GPIO27

L12

14

GPIO14

L13

12

GPIO12

L14

GND

GND

L15

13

GPIO13

L16

D2

SD_DATA2

L17

D3

SD_DATA3

L18

CMD

SD_CMD

L19

5V

External 5V

R1

GND

GND

R2

23

GPIO23

R3

22

GPIO22

R4

TX

U0TXD

R5

RX

U0RXD

R6

21

GPIO21

R7

GND

GND

R8

19

GPIO19

R9

18

GPIO18

R10

5

GPIO5

R11

17

GPIO17

R12

16

GPIO16

R13

4

GPIO4

R14

0

GPIO0

R15

2

GPIO2

R16

15

GPIO15

R17

D1

SD_DATA1

R18

D0

SD_DATA0

R19

CLK

SD_CLK

For the image of header blocks, please refer to Description of Components.