Espressif ESP32-WROOM-32 (38Pin) development board using NodeMCU-32S chip ESP-32S

SKU: FA1053-0
Microcontroller

ESP32-D0WDQ6 (within the ESP-WROOM-32 module)
Processor Cores

Xtensa dual-core 32-bit LX6
Clock Speed

80 MHz to 240 MHz (adjustable)
SRAM

520 KB
Flash Memory

4 MB SPI Flash (32 Mbit)
Operating Voltage

3.3V (Logic level)
Input Voltage (via USB)

5V DC (recommended input current >500mA)
Connectivity

Wi-Fi (802.11b/g/n), Bluetooth 4.2 BR/EDR & BLE
USB Interface Chip

CP2102 (USB-to-UART bridge)
Pin Count

38 Pins (DIP-38 package)
Operating Temperature

–40°C to +85°C (module level)
The Espressif ESP32-WROOM-32 development board (38-pin version), often marketed as the NodeMCU-32S, is a powerful and versatile platform for Internet of Things (IoT) applications. Featuring an integrated ESP32-D0WDQ6 dual-core processor, built-in Wi-Fi and Bluetooth capabilities, and a wide array of GPIO pins, this board provides a comprehensive solution for both hobbyists and professional developers. The 38-pin configuration offers expanded connectivity and is designed to be breadboard-friendly.
Description
The NodeMCU-32S development board is a highly integrated, production-ready solution based on the robust ESP-WROOM-32 module. At its heart lies the powerful Xtensa® 32-bit LX6 dual-core microprocessor, with a clock frequency adjustable from 80 MHz to 240 MHz, capable of handling complex computational tasks and real-time processing with ease.
This board is a true “2-in-1” wireless solution, integrating 2.4 GHz dual-mode Wi-Fi (802.11b/g/n) and Bluetooth (v4.2 BR/EDR and BLE), enabling a wide range of connectivity options from direct internet access via a router to smartphone communication using low-energy beacons. The entire solution occupies minimal PCB area thanks to high integration of antenna switches, RF balun, power amplifiers, and filters.
The 38-pin version is specifically designed for prototyping efficiency, providing more accessible GPIO pins than its 30-pin counterpart while remaining narrow enough for easy use on a standard breadboard. It includes the reliable CP2102 USB-to-UART bridge, ensuring stable and fast programming and debugging via a Micro-USB connection.
With excellent power management features, including a deep-sleep mode drawing less than 5 µA, the board is highly suited for low-power, battery-operated, and wearable electronic applications. It supports multiple development environments like the Arduino IDE, ESP-IDF (Espressif IoT Development Framework), and MicroPython, offering extensive flexibility for software development.
Features
  • Powerful Dual-Core Processing: Xtensa® 32-bit LX6 dual-core CPU, running at up to 240 MHz.
  • Integrated Wi-Fi & Bluetooth: Supports 802.11 b/g/n Wi-Fi and Bluetooth 4.2 BR/EDR and BLE specifications.
  • Extended GPIO Access: The 38-pin form factor breaks out more I/O pins for versatile project design.
  • Efficient Power Management: Features ultra-low power consumption with various sleep modes for battery optimization.
  • Reliable USB Interface: Utilizes the CP2102 USB-to-UART bridge for stable communication during development.
  • Rich Peripheral Interfaces: Includes support for UART, SPI, I²C, I²S, PWM, ADC (18 channels), DAC (2 channels), touch sensors (10), and a Hall sensor.
  • Wide Compatibility: Programmable with Arduino IDE, ESP-IDF, Lua, and MicroPython.
  • Robust Security: Built-in hardware accelerators for security features like secure boot, flash encryption, and TLS 1.2 support.
Parameters
Feature Detail
Microcontroller ESP32-D0WDQ6 (within the ESP-WROOM-32 module)
Processor Cores Xtensa dual-core 32-bit LX6
Clock Speed 80 MHz to 240 MHz (adjustable)
SRAM 520 KB
Flash Memory 4 MB SPI Flash (32 Mbit)
Operating Voltage 3.3V (Logic level)
Input Voltage (via USB) 5V DC (recommended input current >500mA)
Connectivity Wi-Fi (802.11b/g/n), Bluetooth 4.2 BR/EDR & BLE
USB Interface Chip CP2102 (USB-to-UART bridge)
Pin Count 38 Pins (DIP-38 package)
Operating Temperature –40°C to +85°C (module level)
Usage
The NodeMCU-32S development board is a highly versatile tool for a broad spectrum of applications, suitable for both single users and enterprise-level projects.
  • Individual Users/Hobbyists: Perfect for DIY smart home automation, building wireless sensor networks, robotics control systems, and wearable technology projects. The Arduino IDE compatibility provides an easy entry point for development.
  • Business/Industrial Applications: The robust design, wide operating temperature range, and security features make it suitable for industrial automation, commercial IoT devices, smart security systems, and MESH network applications.
Getting Started Guide (Arduino IDE)
  1. Driver Installation: Ensure the VCP drivers for the CP210x chip are installed on your computer for proper USB communication.
  2. IDE Setup: In the Arduino IDE preferences, add the official ESP32 board package URL: raw.githubusercontent.com.
  3. Board Installation: Use the Boards Manager (under Tools > Board) to search for and install the “esp32 by Espressif Systems” package.
  4. Programming: Select the “NodeMCU-32S” board from the Tools menu, choose the correct USB port, and upload your sketch. The board generally features auto-program circuitry, but holding the “BOOT” button while pressing “EN” (Reset) might be required for some variants.
Q: What is the primary advantage of the 38-pin board over the 30-pin version?

The main advantage of the 38-pin version is that it breaks out more GPIO pins to the headers, offering more flexibility and available pins for interfacing with various sensors and peripherals in your projects.

Q: Is the "ESP-32S" chip different from the "ESP-WROOM-32" module?

No, the terms are often used interchangeably in the context of the development boards. The ESP-32S is essentially Ai-Thinker’s equivalent module to Espressif’s ESP-WROOM-32, sharing nearly identical specifications and pinouts. Both contain the core ESP32 chip.

Q: What kind of USB cable should I use to program this board?

A high-quality USB data cable is essential to ensure a stable current supply and reliable data transmission. Avoid using charging-only or low-quality mobile phone cables, as they can cause connectivity or programming issues.

Q: Can I use the ADC pins while Wi-Fi is running?

Some ADC channels (specifically ADC2) might be unusable while the Wi-Fi radio is active due to internal resource sharing. Channels on ADC1 generally work without this limitation.

Q: Does this board support the Lua programming language?

Yes, the NodeMCU platform originated with Lua support. This board supports programming via Lua, the Arduino IDE, MicroPython, and the Espressif IDF framework.

Related products