Wireless-tag WT-ESP32-DEVKITC V4 User manual

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WT-ESP32-DEVKITC V4
Version 1.1.0
Release Date: Jun.17，2020

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Disclaimer and Copyright Notice
Information in this paper, including URL references, is subject to change without
prior notice.
This document is provided “as is”with no warranties whatsoever, including any
warranty of merchantability, non-infringement, fitness for any particular purpose,
or any warranty otherwise arising out of any proposal, specification or sample.
All liability, including liability for infringement of any patent rights，
relating to use of information in this document is disclaimed. No licenses,
either express or implied, by estoppel or otherwise, to any intellectual property
rights are granted herein.
All trade names, trademarks and registered trademarks mentioned in this document
are property of their respective owners, and are hereby acknowledged.

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Revision History
Version
Author
Reviewer
Date
Notes
1.1.0
YANG
Jun.16，2020
First release

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Contents
1. Product Overviews ........................................................................................................5
2. Main Features ................................................................................................................5
3. Functional Descriptions................................................................................................6
4. Power Options ...............................................................................................................8
5. Application Development ............................................................................................8
6. Development Board Size ..............................................................................................8
7. Contact Us ......................................................................................................................9

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1. Product Overviews
WT-ESP32-DevKitC V4 is a small development board based on ESP32, which integrates the
WIFI+Bluetooth solution. Most pins of the modules on the board have been led out.
Developers can easily connect a variety of peripheral devices through jumpers or insert the
development board directly into the breadboard according to their actual needs.
In order to better meet the needs of different users, WT-ESP32-DevKitC V4 also supports the
following different configurations:
Optional multiple ESP32 modules
●ESP32-WROOM-32 module
●ESP32-WROOM-32D
●ESP32-WROOM-32U
●ESP32-SOLO-1 module
●ESP32-WROVER
●ESP32-WROVER-B
●ESP32-WROVER-I
●ESP32-WROVER-I (IPEX)
◊Optional pin header or female header
2. Main Features
❊Small size, big use

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The product is completely upgraded. WT-ESP32-DevKitC V4 is a mini development board
that can be equipped with ESP32-WROOM-32D, ESP32-WROOM-32U, ESP32-WROVER-B
and ESP32-SOLO-1 series modules, and can be easily plugged into a breadboard.
❊Novel and powerful
WT-ESP32-DevKitC V4 supports WIFI+Bluetooth functions, and has rich peripherals, which
can allow developers to use their imagination for secondary development.
❊Easy development and short time-consuming
The RF performance of WT-ESP32-DevKitC V4 has been debugged and improved, so users
do not need to consider RF and antenna design when designing and developing applications.
This development board contains the small system that the user needs, and only needs to
connect USB cable to carry on the development.
❊Flexible and rich features
WT-ESP32-DevKitC V4 has a complete circuit supporting ESP32-WROOM-32D, ESP32-
WROOM-32U, ESP32-WROVER-B, and ESP32-SOLO-1, including USB-UART converter, reset
and download mode buttons, LDO Voltage regulator and micro USB connector. Each GPIO is
available to developers.
❊Easy to plug into a breadboard
WT-ESP32-DevKitC V4, of which pin layout has been optimized, can be easily plugged into
the breadboard for development and debugging. The on-board LDO is led out to supply
power for external components. Different peripheral interfaces are grouped to achieve
barrier-free development.
3. Functional Descriptions
WT-ESP32-DevKitC V4（on-board ESP32-WROOM-32）
Main components
Basic introductions

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ESP32-WROOM-32
Based on ESP32 module, for more details, please refer to
( ESP32-WROOM-32 technical specification )
EN
Reset button
Boot
Download button. Press and hold the Boot button and press
the EN button (do not release the Boot button at this time)
to enter the "firmware download" mode. Download the
firmware through the serial port.
USB-to-UART bridge | Single
chip, USB-UART bridge, up to 3
Mbps transmission rate
Micro USB port
USB interface
used as a power supply for the circuit board, or a
communication interface between the PC and the ESP32-
WROOM-32 module
5V Power On LED
When the development board is powered up (USB or external
5V), the indicator will light up. For more information, see the
schematic in the relevant documentation.
I/O
Most pins of the module on board have been led to the pin
header of the development board. Users can program ESP32
to realize PWM, ADC, DAC, I2C, I2S, SPI and other functions
※Note
Pins D0, D1, D2, D3, CMD and CLK are used for internal communication between
the ESP32 chip and the SPI flash, and are concentrated on the both sides of the
development board near the USB port. Generally speaking, these pins are better
not connected, otherwise it may affect the operation of SPI flash / SPI RAM.
※Note
Pins GPIO16 and GPIO17 are only applicable to the on-board ESP32-WROOM
series and ESP32-SOLO-1 development boards, reserved for internal use.

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4. Power Options
The development board can choose one of the following three power supply modes:
Micro USB power supply ( default )
5V / GND Pin power supply
3V3 / GND Pin power supply
5. Application Development
Before powering on ESP32-DevKitC V4, please make sure that the development board is
intact.
Now, go to the Installation Step by Step chapter in Get Started to see how to set up the
development environment and try to burn the sample project to your development board.
6. Development Board Size
┋Warning
The above power supply modes cannot be connected at the same time,
otherwise the development board and/or power supply may be damaged.

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7. Contact Us
Wireless-Tag Technology Co., Ltd.
Address: Address: Room 801-803, 8th Floor, Block A,
Building 6, International Innovation Valley, Nanshan
District, Shenzhen, China
Postcode：511700
TEL: [phone]
URL: www.wireless-tag.com