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$
| USB | Board | Proccessor | Prog | Mem | Mhz | SPI | I2C | UART | idle PWR | |
|---|---|---|---|---|---|---|---|---|---|---|
Micro | Arduino/Genuino Mega or Mega2560 | ATmega2560 (2560) | 256KB | 8KB | 16 | 5 | 1 | 4 | 0.719W | |
| Generic ESP8266 Module | ESP8266 | 4MB | - | 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"
