Arduino Wifi Wemos D1

The WeMos D1 puts an ESP8266 WiFi microcontroller into the familiar Uno shape, so it accepts many standard shields while adding wireless networking that the Uno has never had. You programme it from the same Arduino IDE after adding the ESP8266 board package. One critical warning: this board runs 3.3V logic, not 5V. Feeding a 5V sensor output straight into a pin can damage it, and shields that assume 5V logic may not work. It also has only one analogue input, with a 0-3.2V range.