MEGA + WiFi R3 ATmega2560+ESP8266, 32Mb, CH340G

Detail about WeMOS Mega + WiFi R3 ATmega2560 + ESP8266 USB-TTL For Arduino Mega NodeMCU

Full integration on one board: Mega R3 ATmega2560 and WiFi ESP8266 with memory 32Mb (megabyte) All of the modules can work together or each separately. And everyone has their own pinout headers The convenient solution for the development of new projects requiring Uno and WiFi Via USB you can update sketches and firmvare for ATmega2560 and for ESP8266. For this on board have the USB-serial converter CH340G Use this board is very simple The board has DIP-switch, to connect the modules For example, to: USB and ATmeg2560, USB and ESP8266, ATmega2560 and ESP8266

Connection DIP
1 2 3 4 5 6 7
ATmega2560<->ESP8266 ON ON OFF OFF OFF OFF OFF
USB <->ATmega2560 OFF OFF ON ON OFF OFF OFF
USB<->ESP8266 (Update firmware or sketch) OFF OFF OFF OFF ON ON ON
USB<->ESP8266 (communication) OFF OFF OFF OFF ON ON OFF
All independent OFF OFF OFF OFF OFF OFF OFF

Special solution:
USB <->ATmega328<-> ESP8266
DIP SWITH 2
Connection 1 2 3 4 5 6 7

USB <-> ATmega2560<-> ESP8266 ON ON ON ON OFF OFF OFF To RXD3/TXD3


USB converter CH340G connect to RX0/TX0 of ATmega2560
ESP8266 connect to RX3/TX3 of ATmega2560