ESP32 DevKit V1 development board

Overview

ESP32 DevKit V1 development board featuring Espressif's ESP32 dual-core Xtensa LX6 processor with integrated Wi-Fi and Bluetooth connectivity. A powerful and versatile IoT development platform designed for smart home automation, wireless communication, embedded systems, robotics, industrial control, and cloud-connected applications. Supports Arduino IDE, ESP-IDF, MicroPython, and PlatformIO development environments.

The board includes onboard USB-UART programming interface, voltage regulator, boot/reset buttons, and accessible GPIO headers for rapid prototyping and production-ready embedded projects.

Specifications

Parameter	Value
Model	ESP32 DevKit V1
Main Chip	Espressif ESP32-WROOM-32
CPU	Dual-core Xtensa LX6
Clock Speed	Up to 240MHz
Flash Memory	4MB
SRAM	520KB
Wi-Fi	802.11 b/g/n 2.4GHz
Bluetooth	Bluetooth 4.2 + BLE
GPIO Pins	Up to 30
ADC	18 channels × 12-bit
DAC	2 channels × 8-bit
UART	3×
SPI	4×
I2C	2×
PWM	Up to 16 channels
Touch Sensor	10 capacitive touch pins
Operating Voltage	3.3V
Input Voltage	5V via Micro USB
USB Interface	CP2102 / CH340
Operating Temperature	-40°C to +85°C
Dimensions	~51mm × 26mm

Pin Configuration

Interface	Pins
UART0	GPIO1 (TX0), GPIO3 (RX0)
I2C	GPIO21 (SDA), GPIO22 (SCL)
SPI	GPIO18 (SCK), GPIO23 (MOSI), GPIO19 (MISO), GPIO5 (CS)
ADC1	GPIO32 – GPIO39
DAC	GPIO25, GPIO26
Touch Sensors	GPIO0, 2, 4, 12–15, 27, 32, 33
PWM	Most GPIO pins
Power	3V3, VIN, GND
Enable	EN
Boot	GPIO0

Features

• Dual-core 240MHz CPU — powerful processing for IoT and embedded applications
• Integrated Wi-Fi + Bluetooth — wireless connectivity built into a single chip
• Large GPIO count — flexible peripheral interfacing
• 12-bit ADC — accurate analog signal measurement
• Capacitive touch support — touch-sensitive input without extra hardware
• Hardware PWM — LED dimming and motor control
• Low-power modes — suitable for battery-powered devices
• Arduino IDE compatible — beginner-friendly development
• ESP-IDF support — professional Espressif framework
• MicroPython support — rapid scripting and prototyping
• FreeRTOS built-in — multitasking support
• Compact design — ideal for prototyping and embedded products

ESP32 vs ESP8266 Comparison

Feature	ESP32	ESP8266
CPU	Dual-core 240MHz	Single-core 80MHz
Wi-Fi	Yes	Yes
Bluetooth	Yes	No
ADC	18ch 12-bit	1ch 10-bit
DAC	2ch	None
GPIO	Up to 30	Up to 17
RAM	520KB	80KB
USB	External USB-UART	External USB-UART
Performance	High	Medium
Best For	Advanced IoT	Basic Wi-Fi projects

Wiring Common Modules

DHT22 Temperature Sensor

DHT22	ESP32
VCC	3.3V
DATA	GPIO4
GND	GND

SSD1306 OLED Display

OLED	ESP32
VCC	3.3V
GND	GND
SDA	GPIO21
SCL	GPIO22

Relay Module

Relay	ESP32
VCC	5V
GND	GND
IN	GPIO18

HC-SR04 Ultrasonic Sensor

HC-SR04	ESP32
VCC	5V
GND	GND
TRIG	GPIO5
ECHO	GPIO18

Applications

• Smart home automation
• IoT sensor nodes
• Wireless monitoring systems
• Robotics and motor control
• Industrial automation
• MQTT and cloud connectivity
• Web servers and REST APIs
• Bluetooth control systems
• Data logging
• AIoT edge devices

Getting Started

Arduino IDE Setup

1. Open Arduino IDE
2. Go to File → Preferences
3. Add ESP32 board URL: https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_index.json
4. Open Board Manager
5. Search esp32
6. Install latest ESP32 package
7. Select ESP32 Dev Module
8. Select COM port
9. Upload code

Basic LED Blink Example

#define LED_PIN 2

void setup() {
    pinMode(LED_PIN, OUTPUT);
}

void loop() {
    digitalWrite(LED_PIN, HIGH);
    delay(1000);

    digitalWrite(LED_PIN, LOW);
    delay(1000);
}

Package Includes

• 1× ESP32 DevKit V1 Board
• 1× Male Pin Header Set

Notes

• GPIO34–GPIO39 are input only
• Logic level is 3.3V only
• Some GPIO pins affect boot mode
• Use stable 5V USB power supply
• Avoid drawing excessive current from onboard regulator