NodeMCU is just like Arduino with onboard Wifi,To know more about NodeMCU visit its official website here.

How to add Nodemcu Board to Arduino IDE

  • Download and Install Arduino IDE .
  • Goto >> Files >> Preferences and paste following Link in "Additional board manager URL's"
"" (Without quotes) 
  • Then,  Goto >> Tools >> Board >> Board Manager.
  • Scroll down to find ESP8266 and click on install.

This will add all the ESP boards to the IDE.

Now select the correct board , eg NodeMCU 1.0 (ESP-12E Module).

Confirm the setting below:

  • Flash Size : "4M (3M SPIFFS)"
  • Debug Port : "Disabled"
  • Debug Level: "None"
  • IWIP Variant: "V2 Lower Memory"
  • CPU Frequency: "80Mhz"
  • Upload Speed: "921600"
  • Erase Flash: "Sketch On"
  • Port : "COM port available" (where the device is connected should show up)

Now upload your sketch on the board via Arduino IDE