HiLetgo 2pcs Wemos D1 Mini Development Board ESP8285 V1.0.0 1MB Flash Lite Wireless WiFi Internet Development Board Wemos D1 Mini ESP8285

Features: 11 digital input / output pins, all pins with interrupt / PWM / I2C / support 1 line (except D0) 1 analog input(3. 2V max input) Micro USB connection, Compatible with Arduino 1MB Flash 500mA resettable fuse A Micro USB connection Board Size: 3. 4x2. 5cm/1. 34x0. 98inch, Tips: * For the pin layout, Google "Wemos mini NodeMcu", For example D5 is equivalent to GPIO 14, * Solder properly, Use a LED to test if it will lit, Pros: * Smaller form than the standard NodeMcu * 4Mb flash memory * Solid build * Usb power works * Works well with Micropython firmware * The Nodemcu/Lua firmware also works fine Steps for usage: * Download the Arduino IDE from the arduino. cc site at en/Main/Software, * I found an OSX driver for the board at github on "adrianmihalko" 's page, You will want the files under the ch340g-ch34g-ch34x-mac-os-x-driver repository, * Once both of these are installed open up the Arduino IDE, * Go into the preferences and add the url as stated in the product description above (sorry can't post the url here), * In the "Board Manager" search for and install the latest version of the "esp8266" generic module, * Select the new "Port" added by the driver: (mine was "/dev/cu. wchusbserial14120"), * Set the "Reset Method" to: nodemcu, * All done, You'd better to write a simple "blink" sketch and upload it to your board to see it work, The LED pin on this board is "2", Package Including: 2* D1 Mini Development Board.