Aliexpress: WAVGAT Mega2560 WiFi R3 ATmega2560 ESP8266 4MB (13$)

Robotdyn: MEGA+WiFi R3 ATmega2560+ESP8266, flash 32Mb, USB-TTL CH340G, Micro-USB (13$)

Aliexpress: 16$


USBBoardProccessorProgMemMhzSPII2CUARTidle PWR

Micro

Arduino/Genuino Mega or Mega2560ATmega2560 (2560)256KB8KB165140.719W

Generic ESP8266 ModuleESP82664MB-80


Switch status and mode selection:

 

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 Mega2560 COM3 connect to ESP8266

ON

ON

ON

ON

OFF

OFF

OFF

NoUSE

Mega2560+ESP8266

ON

ON

OFF

OFF

OFF

OFF

OFF

NoUSE

All modules work independent

OFF

OFF

OFF

OFF

OFF

OFF

OFF

NoUSE


File → Preferences → Additional Board Manager URLs: http://arduino.esp8266.com/stable/package_esp8266com_index.json

Tool → Board → Board Manager → Search "ESP"

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