Arduino: The most important commands at a glance

In this practical tip, we explain which commands are important for the Arduino.

Arduino: the basic commands

The Arduino has some commands that could be useful for many projects. We show you the most important commands here.

• With "pinMode ([Pin], [INPUT / INPUT_PULLUP / OUTPUT]);" you can define a pin as an output, input or input with pull-up resistor.
• You can change the value of a pin with "digitalRead ([Pin]);" digital (0 or 1), or with the command "analogRead ([Pin]);" read out analog (0 - 1023).
• To change the value of a pin, you can either use the command "digitalWrite ([Pin], [HIGH / LOW]);" change digitally, or for analog pins this with "analogWrite ([Pin], [0 - 255]);" to change.
• With the command "delay (1000);" for example, you can pause the program for 1000 milliseconds.

Serial monitor on the Arduino

You can use the serial monitor for serial communication with the Arduino.

• With the command "Serial.begin ([Baudrate]);" start the serial monitor.
• With "Serial.print ([String]);" you can output text and use "Serial.println ([String]);" Output text and start a new line.
• You can also use "Serial.read ();" or "Serial.readString ()" read data and check with "Serial.available ()" whether a connection is available.

In the next article, you will learn how to control LEDs with the Arduino.