The Osoyoo NodeMCU comes pre-programmed with Lua interpretter, but you don't have to use it! Instead, 
you can use the Arduino IDE which may be a great starting point for Arduino lovers to familiarize themselves
 with the technologies surrounding the IoT.Note that when you use the NodeMCU board with the Arduino IDE ,
it will write directly to the firmware, erasing the NodeMCU firmware.So if you want to back to Lua SDK,use the 
"flasher" to re-install the firmware.
The NodeMCU programming can be as easy as in Arduino,the main difference is the distribution of pins in the 
nodemcu board.Following below operations and enjoy your first NodeMCU & Arduino IDE travel!

1.CONNECT YOUR NODEMCU TO THE COMPUTER

Use the USB cable to connect your NodeMCU to the computer,you will see the  blue onboard LED flicker when 
powered up, but they will not stay lit.

2.INSTALL THE COM/SERIAL PORT DRIVER

In order to upload code to the ESP8266 and use the serial console, connect any data-capable micro USB cable to 
ESP8266 IOT Board and the other side to your computer's USB port.
The new version NodeMCUv1.0 comes with the CP2102 serial chip,you can download and install the driver here.
The NodeMCUv0.9 comes with the CH340 serial chip,you can download and install the driver here.

3.INSTALL THE ARDUINO IDE 1.6.4 OR GREATER

Download Arduino IDE from Arduino.cc (1.6.4 or greater) - don't use 1.6.2! You can use your existing IDE if you 
have already installed it.

4.INSTALL THE ESP8266 BOARD PACKAGE

nto Additional Board Manager URLs field in the Arduino v1.6.4+ preferences 
(Open Arduino IDE–>File–>Perferences–>Settings).
reference
Enter the link and click "OK" to save your changes.
save link
Next, use the Board Manager to install the ESP8266 package
board manager
Enter the Boards Manager and find the board type as below:
install in the board manager
Scroll the Broads Manager screen down to the bottom, you will see  A module called 
“esp8266 by esp8266 Community” (see following picture), select the latest version and 
click "Install".
installed
The ESP8266 package has benn installed successfully.
Note: You'd better close the Arduino IDE and restart it again.

5.SETUP ESP8266 SUPPORT

When you've restarted, select NodeMCU 0.9 (or NodeMCU 1.0) from the Tools->Board dropdown
board types
Config the Board menu and choose the right Port for your device.
  • CPU Frequency：80MHz,
  • Flash Size：4M（3M SPIFFS）,
  • Upload Speed：112500
tools
Now just proceed as the Arduino: Start your sketching!
Note: 115200 baud upload speed is a good place to start - later on you can try higher 
speeds but 115200 is a good safe place to start.

6.BLINK TEST

Now,we will try to light the onboard LED as a simple test.
Enter this into the sketch window (and save since you'll have to)
void setup() {
pinMode(D0, OUTPUT)}
void loop() {
digitalWrite(D0, HIGH);
delay(1000);
digitalWrite(D0, LOW);
delay(1000);
}
Upload the sketch via the IDE
upload
The sketch will start immediately - you'll see the LED blinking every sencond.
 Now just proceed as the Arduino: Start your sketching!