38Pin ESP32 Description:

Create powerful IoT applications with the versatile ESP32 Development Board 38pins.
With Wi-Fi and Bluetooth connectivity, dual-core processor, and easy-to-use interface, this board is ideal for beginners and professionals alike. Order now and get started on your next project.

ESP32 is already integrated with antenna and RF balun, power amplifier, low-noise amplifiers, filters,
and power management module. The entire solution takes up the least amount of printed circuit board area.
This board is used with 2.4 GHz dual-mode Wi-Fi and Bluetooth chips by TSMC 40nm low power technology,
power and RF properties best, which is safe, reliable, and scalable to a variety of applications.

Powerful Performance

The ESP32 Development Board 38pins is a high-performance board that is designed to provide powerful and reliable performance. With a dual-core processor and 520KB SRAM, this board is capable of running complex applications with ease. Its Wi-Fi and Bluetooth connectivity options make it ideal for IoT applications and projects.

Versatile Design

This development board features a versatile design that allows you to connect a wide range of sensors, actuators, and other components to create customized IoT solutions. Its 38 pins provide plenty of connectivity options for various projects, and it also has a micro-USB port for easy programming and debugging.

Easy to Use

The ESP32 Development Board 38pins is easy to use, even for beginners. It comes with comprehensive documentation and a user-friendly interface that simplifies the process of setting up and using the board. With the support of the Arduino IDE, you can get started with programming right away, without needing to learn a new programming language.

Features:

High performance-price ratio
Small volume, easily embeded to other products
Strong function with support LWIP protocol, Freertos
Supporting three modes: AP, STA, and AP+STA
Supporting Lua program, easily to develop
Size: 54.6mm(L) * 27.94mm(W)

Expansion Board Description:

• Power Input:
  • USB Micro B - 5VDC
  •  USB Type C - 5VDC
  • 5.5.2.1mm DC Power Jack - 6.5 ~ 16VDC (Recommanded - 12V)
• JUMP: A jumper labeled "JUMP" selects 3.3V or 5V for the power rails. Since the ESP32 uses 3.3V logic, keep it set to 3.3V
• TX/RX, I2C SDA/SCL (D21/D22), power, and ground are available. VCC voltage depends on the JUMP jumper setting.

Role of the JUMP Jumper

The JUMP jumper on this expansion board selects the voltage supplied to the board’s power rail (the red VCC line).

• If you set the jumper to 3.3V, all VCC (red) pins will receive 3.3V.
• If you set the jumper to 5V, all VCC (red) pins will receive 5V

Why Choose Between 3.3V and 5V?

• The ESP32S development board uses 3.3V logic levels. For this reason, it is safest to keep the jumper set to 3.3V for normal operation

• However, some external sensors or modules connected to the expansion board may require 5V power. In these cases, you can move the jumper to 5V so the VCC rail supplies 5V to those devices

Precautions When Using the Jumper

• The ESP32S itself only supports 3.3V. If you set the jumper to 5V, make sure that 5V does not connect directly to the ESP32S logic input pins, as this can damage the board1
• When set to 3.3V, the VCC line is powered by the ESP32S’s onboard 3.3V regulator. The maximum current available is limited by the regulator’s capacity, typically less than 250mA

•When set to 5V, the VCC line is powered directly from the USB or DC jack, providing enough current for 5V sensors or modules

NOTICE: 

• There are several esp32 versions.
• Please refer to the pictures and check check the distance between two rows of pins(25.5mm or 24mm) of ESP32 you have.

 Package Included:

• 1 x ESP32 38P Development Board WiFi+Bluetooth Ultra-Low Power Consumption Dual Core
• 1 x 38Pin ESP32/ ESP32S Expansion Board

Reference

• https://randomnerdtutorials.com/getting-started-with-esp32/
  
• https://lastminuteengineers.com/esp32-arduino-ide-tutorial/