Specifications Compatibility: USB v2.0 standard Interface: Network:USB Serial:RS-485 Port: One Independent RS-485 Connector: Network: USB-type A connector Serial: Screw terminal
Wemos D1Mini Pro is a small board with ESP8266EX chip. On board there is also USB-UART converter (CP2104). All you need to start programming is a USB cable.
WeMos D1 mini V3.0.0 is a miniature WiFi development board. It turns the very popular ESP8266 wireless microcontroller into a fully fledged development board.