Product details of Wemos D1 Mini Pro ESP8266 Package Set
The WeMos D1 mini 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. Programming the D1 mini pro is as simple as programming any other Arduino based microcontroller as the module includes a built in microUSB interface allowing the module to be programmed directly from the Arduino IDE (requires the ESP8266 support to be added via board manager) with no additional hardware.
The D1 mini Pro is also designed to allow Wemos compatible shields to be plugged into the board in a similar way to the Arduino development board platform which greatly expands its capabilities.
11 digital input/output pins
1 analog input(3.2V max input)
16M bytes(128M bit) Flash
External antenna connector
Built-in ceramic antenna
New CP2104 USB-TO-UART IC
Same size as D1 mini, but more light
Specifications of Wemos D1 Mini Pro ESP8266 Package Set