The NodeMCU ESP32 WiFi Bluetooth Dual Mode IoT Dev Board (38-Pin) is a powerful and versatile microcontroller development board based on the ESP32 chip. It combines Wi-Fi and Bluetooth (Classic + BLE) connectivity with rich peripherals, making it ideal for IoT projects, wearable devices, home automation, sensor networks, and smart gadgets. Featuring a 38-pin expansion layout, it offers plenty of interfaces for sensors, actuators, and communication modules.

Key Features:

• Dual Connectivity: Built-in Wi-Fi (802.11 b/g/n) and Bluetooth Classic + BLE for wireless IoT applications
• ESP32 Core: Powerful Tensilica Xtensa 32-bit LX6 dual-core processor
• 38-Pin Expansion: Breakout pins for GPIO, ADC, DAC, SPI, I²C, UART, PWM, and more
• Low Power Modes: Designed for energy-efficient battery-powered applications
• USB-to-Serial Interface: Easy programming via USB
• NodeMCU Lua & Arduino IDE Support: Compatible with both environments for flexible development

Specifications:

• Microcontroller: ESP32 (Xtensa LX6 dual core)
• Operating Frequency: Up to 240 MHz
• Wireless:
  • Wi-Fi: 802.11 b/g/n
  • Bluetooth: Classic + BLE
• Flash Memory: Typically 4 MB
• SRAM: 520 KB internal
• Pins: 38 general-purpose pins
• Interfaces: UART, SPI, I²C, PWM, ADC, DAC, Touch sensors
• USB Interface: Micro-USB or USB-C (board variant dependent)
• Operating Voltage: 3.3 V logic (board includes 5 V-to-3.3 V regulator)
• Power Supply: USB or external 5 V input with onboard regulator
• Dimensions: Standard NodeMCU form factor for breadboard and prototype use

Applications:

• Internet of Things (IoT) projects with cloud connectivity
• Smart home automation (lights, sensors, switches)
• Bluetooth remote sensing and control
• Wearable and battery-powered devices
• Robotics and telemetry systems
• Data logging and wireless sensor networks