ESP32 D1 R32 Development Board – WiFi + Bluetooth in Arduino UNO Form Factor

Powerful Dual-Core ESP32 Module with Arduino UNO Shield Compatibility and Wireless Connectivity

The Arduino Uno R3 D1 R32 (ESP32) Development Board — also known as ESP32 UNO D1 R32 or Wemos D1 UNO R32 — is a powerful microcontroller development board that combines the advanced ESP32-WROOM-32 chip with an Arduino UNO R3 form factor and pin layout. It’s designed for projects that require wireless communication (Wi-Fi and Bluetooth) and robust I/O connectivity, while remaining compatible with the familiar Arduino ecosystem.

Key Features:

• Microcontroller: ESP32-WROOM-32 with dual-core Tensilica LX6 CPU up to 240 MHz and integrated Wi-Fi (802.11 b/g/n) + Bluetooth v4.2.

• Arduino UNO R3 Form Factor: Compatible layout for shields and accessories designed for Arduino, though logic level is 3.3 V.

• Power Input: 5–12 V DC via microUSB or barrel connector; regulated 3.3 V logic.

• I/O & Interfaces: Approx. 20 digital I/O pins (PWM), 6 ADC analog inputs, and support for UART, SPI, I²C.

• Memory: 4 MB Flash, ~520 KB SRAM — suitable for complex applications.

• Wireless Connectivity: Integrated Wi-Fi and Bluetooth open up possibilities for IoT, remote control, and sensor networks.

Typical Uses:
✔ IoT devices and smart home systems — connect sensors and send data to cloud or smartphones.
✔ Automation and robotics projects — wireless control and telemetry.
✔ Wireless communication applications — Bluetooth LE devices, remote sensors.
✔ Educational and maker projects — great for learning and prototyping.

Note: Although the board matches the standard Arduino UNO layout, its I/O logic operates at 3.3 V, so ensure peripheral shields and modules are compatible or use appropriate level shifting.