We offer a board similar to this called the Wemos D1 Mini that is much smaller in size and breadboard-compatible. Note: The D1 R2 is a 3.3V device. If you connect it to 5V digital sensors or devices you may need a logic-level converter such as our 4-channel or 8-channel logic-level converter modules. WeMos D1, D1 R2 & D1 mini Arduino Examples. For more information, see the WeMos website or visit the forum. You can purchase the WeMos D1, D1 R2, D1 mini and various shields from our AliExpress store. GitHub is where people build software. More than 100 million people use GitHub to discover, fork, and contribute to over 420 million projects. 60LM.