ESP32-DevKitC V4 Getting Started Guide
This guide shows how to start using the ESP32-DevKitC V4 development board. For descriptions of other versions of ESP32-DevKitC, check the ESP32 Hardware Reference.
What You Need
- ESP32-DevKitC V4 board
- USB A / micro USB B cable
- Computer running Windows, Linux, or macOS
You can skip the introduction sections and go directly to Section Start Application Development.
Overview
ESP32-DevKitC V4 is a small-sized ESP32-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. Developers can either connect peripherals with jumper wires or mount ESP32-DevKitC V4 on a breadboard.
To cover a wide range of user requirements, the following versions of ESP32-DevKitC V4 are available:
- Different ESP32 modules: ESP32-WROOM-32E, ESP32-WROOM-32UE, ESP32-WROOM-32D, ESP32-WROOM-32U, ESP32-SOLO-1, ESP32-WROVER-E, ESP32-WROVER-IE
- Male or female pin headers.
For details, please refer to Espressif Product Ordering Information.
Functional Description
The following figure and the table below describe the key components, interfaces, and controls of the ESP32-DevKitC V4 board.
ESP32-DevKitC V4 with ESP32-WROOM-32 module soldered
Key Component Description
| Component | Description |
| ESP32-WROOM-32 | A module with ESP32 at its core. |
| EN Button | Reset button. |
| Boot Button | Download button. Holding down Boot and then pressing EN initiates download mode. |
| USB-to-UART Bridge | Single USB-UART bridge chip provides transfer rates of up to 3 Mbps. |
| Micro USB Port | USB interface. Provides power supply for the board and data transfer. |
| 5V Power On LED | Turns on when the USB or an external 5V power supply is connected. |
| I/O Connector | Most of the pins on the ESP module are broken out to the pin headers. |
Note: The pins D0, D1, D2, D3, CMD, and CLK are used internally for communication between ESP32 and SPI flash memory. They are grouped on both sides near the USB connector. Avoid using these pins, as it may disrupt access to the SPI flash memory / SPI RAM.
Note: The pins GPIO16 and GPIO17 are available for use only on boards with the ESP32-WROOM and ESP32-SOLO-1 modules. Boards with ESP32-WROVER modules have these pins reserved for internal use.
Power Supply Options
There are three mutually exclusive ways to provide power to the board:
- Micro USB port (default power supply)
- 5V / GND header pins
- 3V3 / 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.
Header Block
The two tables below provide the Name and Function of I/O header pins on both sides of the board, as shown in the ESP32-DevKitC V4 with ESP32-WROOM-32 module soldered. The numbering and names are the same as in the ESP32-DevKitC V4 schematics (PDF).
J1
| No. | Name | Type | Function |
| 1 | 3V3 | P | 3.3 V power supply |
| 2 | EN | I | CHIP_PU, Reset |
| 3 | IO36 | I | GPIO36, ADC1_CH0, S_VP |
| 4 | IO39 | I | GPIO39, ADC1_CH3, S_VN |
| 5 | IO34 | I | GPIO34, ADC1_CH6, VDET_1 |
| 6 | IO35 | I | GPIO35, ADC1_CH7, VDET_2 |
| 7 | IO32 | I/O | GPIO32, ADC1_CH4, TOUCH_CH9, XTAL_32K_P |
| 8 | IO33 | I/O | GPIO33, ADC1_CH5, TOUCH_CH8, XTAL_32K_N |
| 9 | IO25 | I/O | GPIO25, ADC1_CH8, DAC_1 |
| 10 | IO26 | I/O | GPIO26, ADC2_CH9, DAC_2 |
| 11 | IO27 | I/O | GPIO27, ADC2_CH7, TOUCH_CH7 |
| 12 | IO14 | I/O | GPIO14, ADC2_CH6, TOUCH_CH6, MTMS |
| 13 | IO12 | I/O | GPIO12, ADC2_CH5, TOUCH_CH5, MTDI |
| 14 | GND | G | Ground |
| 15 | IO13 | I/O | GPIO13, ADC2_CH4, TOUCH_CH4, MTCK |
| 16 | IO9 | I/O | GPIO9, D2 |
| 17 | IO10 | I/O | GPIO10, D3 |
| 18 | IO11 | I/O | GPIO11, CMD |
| 19 | 5V0 | P | 5 V power supply |
J3
| No. | Name | Type | Function |
| 1 | GND | G | Ground |
| 2 | IO23 | I/O | GPIO23 |
| 3 | IO22 | I/O | GPIO22 |
| 4 | IO1 | I/O | GPIO1, U0TXD |
| 5 | IO3 | I/O | GPIO3, U0RXD |
| 6 | IO21 | I/O | GPIO21 |
| 7 | GND | G | Ground |
| 8 | IO19 | I/O | GPIO19 |
| 9 | IO18 | I/O | GPIO18 |
| 10 | IO5 | I/O | GPIO5 |
| 11 | IO17 | I/O | GPIO17 |
| 12 | IO16 | I/O | GPIO16 |
| 13 | IO4 | I/O | GPIO4, ADC2_CH0, TOUCH_CH0 |
| 14 | IO0 | I/O | GPIO0, ADC2_CH1, TOUCH_CH1, Boot |
| 16 | IO2 | I/O | GPIO2, ADC2_CH2, TOUCH_CH2 |
| 17 | IO15 | I/O | GPIO15, ADC2_CH3, TOUCH_CH3, MTDO |
| 17 | IO8 | I/O | GPIO8, D1 |
| 18 | IO7 | I/O | GPIO7, D0 |
| 19 | IO6 | I/O | GPIO6, SCK |
P: Power supply; I: Input; O: Output; T: High impedance.
Pin Layout
ESP32-DevKitC
The image shows the pinout of the ESP32-DevKitC board, with labels for each pin and its function. The dimensions of the board are also indicated: 54.4 mm in length and 27.9 mm in width.
Note on C15
The component C15 may cause the following issues on earlier ESP32-DevKitC V4 boards:
- The board may boot into Download mode.
- If you output clock on GPIO0, C15 may impact the signal.
In case these issues occur, please remove the component. The figure below shows C15 highlighted in yellow.
Location of C15 (yellow) on ESP32-DevKitC V4 board
Start Application Development
Before powering up your ESP32-DevKitC V4, please make sure that the board is in good condition with no obvious signs of damage.
After that, proceed to Get Started, where Section Installation Step by Step will quickly help you set up the development environment and then flash an example project onto your board.
Board Dimensions
The image displays the dimensions of the ESP32 DevKitC board, showing a length of 48.2 mm and a width of 27.9 mm.
Related Documents
- ESP32-DevKitC V4 schematics (PDF)
- ESP32 Datasheet (PDF)
- ESP32-WROOM-32 Datasheet (PDF)
- ESP32-WROOM-32D and ESP32-WROOM-32U Datasheet (PDF)
- ESP32-WROVER Datasheet (PDF)
- ESP32-WROVER-B Datasheet (PDF)
- Espressif Product Ordering Information (PDF)
For further design documentation for the board, please contact Espressif at sales@espressif.com.
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