The WeMos D1 min PRO is a miniature wireless 802.11 (Wifi) microcontroller development board. It turns the very popular ESP8266 wireless microcontroller module into a fully-fledged development board.
The WeMos D1 mini Lite is a miniature wireless 802.11 (Wifi) microcontroller development board. It turns the very popular ESP8285 wireless microcontroller into a fully-fledged development board.
The WeMos D1 R2 Uno based ESP8266 is a wireless 802.11 (Wifi) microcontroller development board is compatible with the Arduino IDE. It turns the very popular ESP8266 wireless (WiFi) module into a fully-fledged development board.