How to Use the ESP32 DevKit V1 Board for WiFi Projects
Use the ESP32 DevKit V1 when you need WiFi, Bluetooth, and many GPIO pins on one board. It is a 30-pin WROOM-32 board with a dual-core processor. The board costs from $11.99, with Micro USB and Type-C versions. An OLED display shows sensor readings.
Quick facts
| Fact | Value |
|---|---|
| Board | 30-pin WROOM-32, dual-core processor |
| Wireless | WiFi and Bluetooth |
| USB versions | Micro USB or Type-C |
| Board price | From $11.99, board versions $15.99 to $17.99 |
| OLED display | 0.96 inch, 128 by 64 pixels, I2C |
| DHT22 sensor | 0 to 100% RH, -40 to 80C |
What is on the ESP32 DevKit V1 board?
The DevKit V1 is a 30-pin WROOM-32 board with a dual-core processor. It gives WiFi and Bluetooth on one chip.
Thirty pins give you room for sensors, displays, and servos on one board. That suits bench projects that outgrow a small board.
The board works with the Arduino IDE through the Arduino-ESP32 core. Espressif documents the core and its GPIO, WiFi, and Bluetooth APIs.
Which USB version fits your cables?
Pick the Type-C board at $15.99 if your cables and chargers use Type-C. Pick the Micro board at $17.99 if your bench uses Micro USB.
Both boards give the same 30-pin WROOM-32 layout. The USB port is the only difference between the two board versions.
A breakout board option is listed from $11.99. With a breakout board, the Type-C set costs $22.99 and the Micro set costs $23.99.
How do you add an OLED display?
The 0.96 inch OLED display measures 128 by 64 pixels on I2C. It uses 4 pins, GND, VCC, SCL, and SDA, and takes 3.3V to 5V.
That voltage range suits the DevKit V1 with no extra level shifting. The display costs from $5.47 by color.
Show sensor readings on the display while you test. Update it once per loop so the numbers stay readable.
How do you read temperature and humidity?
The DHT22 sensor reads 0 to 100% relative humidity and -40 to 80C. It runs on 3.3V to 5.5V with a single-bus output.
That range suits indoor and outdoor bench tests. The sensor costs $5.96 and works with Arduino and ESP32 boards.
Wire its data pin to a free GPIO pin on the DevKit V1. Read it once per 2 sec, since the sensor needs time between reads.
How do you power the board and its sensors?
Power the board over its USB port from a stable 5V supply. A laptop USB port suits bench work, and a 5V supply suits a fixed install.
The OLED takes 3.3V to 5V, and the DHT22 takes 3.3V to 5.5V. Both run from the board pins with no extra regulator.
Keep the sensor wires short to avoid noise on the readings. A short run gives steadier numbers than a long run.
How the options compare
| Part | Key spec | Price |
|---|---|---|
| DevKit V1, Type-C board | 30-pin WROOM-32, WiFi and Bluetooth | $15.99 |
| DevKit V1, Micro board | 30-pin WROOM-32, WiFi and Bluetooth | $17.99 |
| DevKit V1, Type-C with breakout | 30-pin WROOM-32 plus breakout board | $22.99 |
| DevKit V1, Micro with breakout | 30-pin WROOM-32 plus breakout board | $23.99 |
| OLED display | 0.96 inch, 128 by 64 pixels, I2C | From $5.47 |
| DHT22 sensor | 0 to 100% RH, -40 to 80C | $5.96 |
How do you run your first DevKit V1 project?
- Connect the board to your computer over USB.
- Pick the ESP32 DevKit V1 board in the Arduino IDE.
- Wire the OLED display to the I2C pins, GND, VCC, SCL, and SDA.
- Wire the DHT22 data pin to a free GPIO pin.
- Load the sketch and open the serial monitor.
- Check that the display shows temperature and humidity readings.
Parts that fit this guide
In-stock parts ship from the New York, USA warehouse in 1-2 business days. Prices below are the live store prices we verified on November 10, 2026.
ESP32 DevKit V1 Development Board, 30-Pin WROOM-32, WiFi + Bluetooth ($11.99)
ESP32 DevKit V1 at $11.99 listed, with board versions at $15.99 to $17.99. It is a 30-pin WROOM-32 board with WiFi and Bluetooth.
0.96 Inch OLED Display Module, SSD1306, I2C, 128×64, for Arduino / ESP32 / ESP8266 ($5.47)
OLED display at $5.47. It measures 0.96 inch with 128 by 64 pixels on I2C, and takes 3.3V to 5V.
DHT22 / AM2302 Digital Temperature & Humidity Sensor Module ($5.96)
DHT22 sensor at $5.96. It reads 0 to 100% relative humidity and -40 to 80C on 3.3V to 5.5V.
Shop the full range: ESP32 and ESP8266 at Quality RC Parts. See also: Related guide.
Frequently asked questions
How many pins does the DevKit V1 have?
It is a 30-pin WROOM-32 board with WiFi and Bluetooth on one chip.
Should I pick Micro USB or Type-C?
Pick the port that matches your cables. The Type-C board costs $15.99, and the Micro board costs $17.99.
Does the board work with the Arduino IDE?
Yes. It works through the Arduino-ESP32 core, which Espressif documents.
What display works with the DevKit V1?
The 0.96 inch OLED display at $5.47. It runs on I2C with 4 pins and takes 3.3V to 5V.
Sources
- Espressif ESP32 technical reference
- Espressif Arduino-ESP32 documentation
- Espressif ESP32 product page
Last updated: November 10, 2026.