Espressif Systems ESP8266-DevKitS User manual

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ESP8266-DevKitS
User Guide
Version 1.0
Espressif Systems
Copyright © 2020

About This Guide
This user guide provides information on ESP8266-DevKitS-development board.
Release Notes
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Certification
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Date
Version
Release notes
2020.02
V1.0
Initial release.
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Tables of Contents
1. Overview 1................................................................................................................................
2. Functional Description 2..........................................................................................................
3. How to Flash a Board 4............................................................................................................
3.1. Hardware Preparation!4"................................................................................................................
3.2. Hardware Setup!4".........................................................................................................................
3.3. Software Setup!4"..........................................................................................................................
4. Board Dimensions 5.................................................................................................................
5. Hardware Reference 6..............................................................................................................
5.1. Block Diagram!6"............................................................................................................................
5.2. Power Supply Options!6"...............................................................................................................
5.3. Header Blocks!6"............................................................................................................................
A. Appendix—Learning Resources 8...........................................................................................
A.1. Must-Read Documents!8"..............................................................................................................
A.2. Must-Have Resources!9................................................................................................................

!
1. Overview"
1. Overview
ESP8266-DevKitS is Espressif’s flashing board designed specifically for ESP8266. It can be
used to flash an ESP8266 module without soldering the module to the power supply and
signal lines. With a module mounted, ESP8266-DevKitS can also be used as a mini
development board like ESP8266-DevKitC.
ESP8266-DevKitS supports the following ESP8266 modules:
- ESP-WROOM-02
- ESP-WROOM-02D
- ESP-WROOM-02U
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2. Functional Description"
2. Functional Description
!
Figure 2-1. ESP8266-DevKitS
This chapter introduces key components, interfaces and controls of ESP8266-DevKitS
development board:
•Spring Pins
Connect and fix the module. These spring pins fit castellated holes on the module.
•2.54 mm Female Headers
Connect to jumper wires and other development boards. For description of female
headers, please refer to 5.3 Header Blocks.
•USB-to-UART Bridge
A single chip USB-UART bridge provides up to 3 Mbps transfers rates.!
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2. Functional Description"
•LDO
5V-to-3.3V Low dropout voltage regulator (LDO).
•Boot Button
Download button. Holding down the Boot button and pressing the EN button initiates
the firmware download mode. Then users can download firmware through the serial
port.
•Micro USB Port/Micro USB Connector
USB interface. Power supply for the board and the communication interface between
a computer and the board.
•EN Button
Reset button. Pressing this button resets the system.
•Power On LED
Turns on when the USB or power supply is connected to the board.!
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3. How to Flash a Board
3. How to Flash a Board
3.1. Hardware Preparation
•1 x ESP8266 module of your choice
•1 x USB 2.0 cable (Standard-A to Micro-B)
•1 x PC loaded with Windows, Linux or Mac OS
3.2. Hardware Setup
Please mount a module of your choice onto your ESP8266-DevKitS according to the
following steps:
•Gently put your module on the ESP8266-DevKitS 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.
3.3. Software Setup
For step-by-step introductions, please refer to ESP8266 Quick Start Guide.
📖Note:
1. To flash binary files, the ESP32 chip should be set to UART boot 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 binary files have been flashed, please reset or power up your ESP32 module again to run the
flashed application (this step is executed automatically by the flash tool by default).
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4. Board Dimensions
4. Board Dimensions
!
Figure 4-1. Board Dimensions
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5. Hardware Reference
5. Hardware Reference
5.1. Block Diagram
Figure 5-1. ESP8266-DevKitS Block Diagram
5.2. 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.
5.3. Header Blocks
Table 5-1. Header Block
Location
Label
Signal
L1
G
GND
L2
3V3
VDD 3V3
L3
3V3
VDD 3V3
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5. Hardware Reference
L4
EN
CHIP_EN
L5
G
GND
L6
14
GPIO14
L7
12
GPIO12
L8
13
GPIO13
L9
15
GPIO15
L10
2
GPIO2
L11
0
GPIO0
L12
G
GND
L13
5V
External 5V
L14
G
GND
L15
G
GND
R1
G
GND
R2
16
GPIO16
R3
G
GND
R4
TX
U0TXD
R5
RX
U0RXD
R6
G
GND
R7
4
GPIO4
R8
RST
EXT_RSTB
R9
5
GPIO5
R10
ADC
To TOUT after a voltage divider
R11
G
GND
R12
G
GND
R13
G
GND
R14
G
GND
R15
G
GND
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