Lue lisää:Arduino MEGA 2560 With WiFi Built-in - ESP8266
In today's text, we discuss an Arduino that I consider extremely special, as it has an ESP8266 embedded in its board. It doesn’t have the ESP12 soldered onto the board. Instead, it has the Espressif chip. So, on the board you have the built-in Tensilica chip with 4MB of memory, along with the ATmega2560, which is the traditional Arduino Mega.
https://www.instructables.com/Arduino-M ... n-ESP8266/