Connecting and working with Mega +WiFi R3 ATmega2560+ESP8266 (32Mb memory)

Hi Guys,

Recently bought a Mega +WiFi R3 ATmega2560+ESP8266 (32Mb memory)

Could you guys tell me how to work on it, now I just want to control a led over the internet

How I can program the Mega and the esp8266 and make them connect to each other

I actually searching that and there is almost no documentation on the entire WWW. The only thing, one could find would be something in Russian and others only translated out of it. That too does not work here.

https://robotdyn.com/mega-wifi-r3-atmega2560-esp8266-flash-32mb-usb-ttl-ch340g-micro-usb.html