What's new about V2.1.0

• Use BRT (Bias Resistor Transistor), easier into flash mode.
• Optimize the circuit, the system is more stable.
• Based on the ESP-8266EX.

• For Arduino Compatible, you can use it on for Arduino IDE.
• NodeMcu Compatible
• 11 Digital I/O pins
• 1 Analog Input pin
• OTA -- Wireless Upload(Program)
• On board switching power supply -- Max 24V input, 5V 1A output

Programming:
The D1 R2 has a micro USB for auto programming.
Also you can programming it using OTA

Package included:
1 x For WeMos D1 R2 V2.1.0 WiFi Uno Based ESP8266 For Arduino Nodemcu Compatible