NodeMCU Lesson 2—Hello World!

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• Preparation
• Code

After completed above oprations, try to upload the first sketch to the NodeMCU.

Preparation

• NodeMCU x1
• USB Cable x 1
• PC x1

Code:

Connect your NodeMCU to the PC and put below code to your Arduino IDE (you can download the sketch file from https://osoyoo.com/download/code/nodemcu-lesson2.zip).

void setup()
{
Serial.begin(115200);//Set the baudrate to 115200,same as the software settings
}
void loop()
{
Serial.println("Hello World!");//Print character string“Hello World！”on the serial
delay(5000);// Delay 5 second
}

Choose corresponding board/port for your project,upload the sketch to the board.

After upload down,click Serial Monitor button,you will see the running result as below:

You will see the serial monitor output every 5 second.

Note: Make sure the baudrate is same as your sketch setting.