Keyestudio EASY PLUG Ultimate Starter Kit - Page 78

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digitalWrite(ledpin,HIGH);
delay(500);
digitalWrite(ledpin,LOW);
delay(500);
Serial.println("Hello World!");
}
}
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Select the Arduino Board
Open the Arduino IDE, you’ll need to click the “Tools”, then select the Board that
corresponds to your Arduino.
Select your serial port
Select the serial device of the Arduino board from the Tools | Serial Port menu.