WeMos D1 R2 WiFi ESP8266 Development Board Compatible Arduino UNO Program By Arduino IDE

• The D1 R2 is a mini wifi board based on ESP-8266EX.
• 11 digital input/output pins, all pins have interrupt/pwm/I2C/one-wire supported(except D0)
• 1 analog input(3.3V max input)
• A Micro USB connection
• A power jack, 9-24V power input.
• Compatible withArduino
• Compatible with nodemcu

Programming:

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

Warnings:

All IO works at 3.3V.