Module Arduino Mega2560 - ESP8266

WiFi Module R3 ATmega2560 + Memory ESP8266 32Mb USB-TTL    CH340G Compatible with Arduino Mega NodeMCU ESP8266    Fully integrated on one board: Mega R3 ATmega2560 and WiFi    ESP8266 with 32Mb memory.    All modules can work together or each module    individual.    Convenient solution for developing new projects that need Uno and    WIFI:    Through USB, you can update sketches and chapters    firmware for ATmega2560 and for ESP8266.    For this on board there is the USB adapter CH340G.    Using this table is very simple.    The board has a DIP switch, to connect the modules.    For example: to: USB and ATmeg2560, USB and ESP8266, ATmega2560 and    ESP8266.