ESP-32S 38-pin NodeMCU WiFi + Bluetooth BLE IoT ESP-32 ESP-WROOM-32 DevKit

Product description - ESP-32S 38-pin NodeMCU

The ESP-32S 38-pin development board is a capable, well-regarded platform for building projects in Internet of Things (IoT) - ideal for Arduino and ESP32. With its 32-bit dual-core architecture running at 240 MHz, the module delivers strong performance. The board includes 4 MB Flash memory, 520 kB RAM, and a built-in USB-UART CP2102 converter.

The ESP-WROOM-32 microcontroller is energy-efficient and offers built-in WiFi and Bluetooth Low Energy (BLE). The device provides a wide range of communication interfaces, including UART, SPI, I2C and I2S. The built-in ADC enables analog signal measurement, and the DAC interface can generate analog outputs. Programming is straightforward thanks to Arduino IDE support.

Key technical specifications

• Microcontroller: ESP-WROOM-32 clocked at 240 MHz
• Memory: 520 kB RAM and 4 MB FLASH
• Interfaces: 33 GPIO pins, 3 x UART, 3 x SPI, 2 x I2C, 2 x I2S
• Converters: 12-channel ADC and 2-channel DAC
• Extras: PWM outputs, SD card interface, built-in Hall sensor, capacitive touch support
• Power and programming: micro-USB connector with CP2102 converter
• Construction: built-in PCB antenna, soldered pin headers (pitch 2.54 mm)
• Module dimensions: 54.6 x 28 x 8 mm (without connectors)

Example applications

• Smart home systems - works with Domoticz, Home Assistant, Openhab and HomeKit
• Weather sensors and stations with WiFi connectivity
• Internet of Things (IoT) projects that require low power consumption
• Wireless control of devices via Bluetooth BLE
• Prototyping electronics with Arduino IDE

Benefits

• High performance from a 32-bit dual-core processor
• Easy programming in the popular Arduino IDE
• Ready to use out of the box - soldered pin headers
• Versatile thanks to many interfaces and 33 GPIO pins
• Compact size for fitting into small enclosures