D1 WiFi ARDUINO UNO R3 To ESP8266 ESP-12E ESP-12 WIFI Module For Arduino UNO R3 Development Board Leads Female Header Pin 

WeMos D1 R1 is an Arduino like development board based on the polpular ESP8266 IOT chip. It is the same Wi-Fi board like other ESP8266 boards with the convenience of Arduino form factor and an on-board usb-serial converter (CH340) . That means you can attach Arduino shields on top of it. Moreover, it can be programmed using the Arduino IDE as well.

If you are developing an Arduino based IOT project, this board is the best choice for you.

Features:

• Based on the ESP-8266EX.
• Arduino Compatible, you can use it on Arduino IDE.
• 11 Digital I/O pins
• 1 Analog Input pin
• OTA — Wireless Upload(Program)
• On board switching power supply — Max 24V input, 5V 1A output

Technical Parameters:

• Microcontroller:ESP8266EX
• Operating Voltage: 3.3V
• Digital I/O Pins: 11 (with Interrupt, I2C, PWM and One-Wire Capability – Except D0)
• Analog Input Pins: 1 (3.2V Max Input)
• Flash Memory: 4MB
• Clock Speed: 80MHz / 160MHz
• Connection Type: Micro B-Type USB
• On-Board PSU Voltage: 9V to 12V
• On-Board PSU Output: 5V @ 1A Max

Package Include:

• 1 x  WeMos D1 WiFi UNO R3 To ESP8266 ESP-12E ESP-12 Wireless WIFI Module