#2760: WeMos D1 WiFi Wireless Development Board CH340 ESP8266

R143.10

This is a great Arduino-like development board but it NOT an Arduino, it is a "WeMos". You can code it in the normal Arduino IDE but this board is different from a normal Uno in many ways. It runs at 80MHz (vs 16MHz of an Uno) and operates at 3.3V (thus is less power intensive than an Uno) and also has 4MB of built-in storage space! The downside is that even though layout looks very similar to an Uno, it is not compatible with most Arduino Shields due the operating voltage being 3.3V (versus 5V for an Uno).

To communicate between an Arduino and a WeMos you need to add a middleman device to change the voltages from 5v to 3.3v (and vice versa) such as a standard I2C module available from the Leobot website.

The biggest benifit of this development board is its built-in support for WiFi support! It even includes an example code to create a simple HTTP server to be used in The Internet Of Things (IOT) projects by allowing you communicate directly with your Arduino over the internet from anywhere in the world.

More detail can be found on the WeMos site about the D1: https://wiki.wemos.cc/products:d1:d1

Remember to NEVER directly connect an Arduino to a WeMos or you may destroy the WeMos. Use an I2C converter in between at all times.