The WeMos D1 R2 V2.1.0 is an ESP8266-based WiFi development board with Arduino-compatible pin layout, featuring 4MB flash memory and operating at 3.3V for IoT projects.

Microcontroller: ESP8266 Operating Voltage: 3.3V Digital I/O Pins: 11 Analog I/O Pins: 1 Flash Memory: 4 MB Dimensions (LxWxH): 68x54x12 mm WiFi Protocol: 802.11 b/g/n Arduino Compatible: Yes USB Interface: Micro-USB

