Fysetc AIO II V3.2 wifi addition

Hey everyone I was just wondering if anyone has or knows how to add wifi capabilities to the All In One 2 v3.2 control board. I have an esp8266 wifi module and an esp8266 from fysetc which comes with a chip to upload the firmware onto it. I Know that the Rx,Tx pins and the power pins need to be hooked up for the wifi module to work with ESP3D after flashing it on an ESP8266.

Any help is much appreciated.
Thanks

Its just a serial port.

enable define SERIAL_PORT_2 2 is all that is needed in marlin firmware

port 2 was from determined from reading circuit diagrams [github.com]

the wiring for the fysetc esp8266 is here on this advert [www.aliexpress.com]

joining the two together... the 8 pin socket on the AIO has gnd tx and rx, see J4 on circuit diagram

But I don't see a 5v you can use anywhere...

Thanks a lot @Dust. I also had a look at those schematics and the fysetc esp8266 my boss gave me wasn't working, (I couldn't get the Com port to show up). I did end up using a esp8266-01 board that I had and got it up and running. Although I did have to make the following changes-

1. The port I used was port 3, i.e. SERIAL_PORT_2 3.
2. The connection diagram was a little different, since my esp board required only 3.3v. I connected it according to the schematic you have linked and I also had to connect the enable pin to the 3.3v line.

once again thanks a lot for helping.