I use a separate ESP8266 module and a level converter to connect my arduino serial port to WiFi. A while a go i found an Arduino R3 board with build in ESP8266 on ebay and i ordered one.

The board: https://www.ebay.nl/itm/WiFi-UNO-R3-...sAAOSwAQBZp8Nu_


I received it and tested it. It works great, don't need a level converter, USB to serial adaptor, or wires. Just set some dip-switches and you are done.


I wrote a sketch based on the Arduino ESP8266 library that makes a transparent WiFi<=>Serial bridge. It supports DHCP, Fixed IP, MDNS and LLMNR so connections can be made using a IP-address or the assigned host name of the ESP8266 controller. Tested it with my own GRBL Lathe software CNCL and GRBL Panel. Also tested a standalone ESP8266-01 module.

The sketch and documentation are available on: Welkom op www.mwt.messageboard.nl