Wemos ATMega2560 + ESP8266

                                              1   2   3   4   5   6   7    8
CH340 connect to ESP8266 (upload sketch)     OFF OFF OFF OFF ON  ON  ON  NoUSE
CH340 connect to ESP8266 (connect)           OFF OFF OFF OFF ON  ON  OFF NoUSE
CH340 connect to ATmega2560 (upload sketch)  OFF OFF ON  ON  OFF OFF OFF NoUSE
CH340 connect to ATMega2560 COM to ESP8266   ON  ON  ON  ON  OFF OFF OFF NoUSE
ATMega2560 + ESP8266                         ON  ON  OFF OFF OFF OFF OFF NoUSE
All modules work independent                 OFF OFF OFF OFF OFF OFF OFF NoUSE

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

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