Arduino

The Arduino Uno Blocks

The blocks consist of a set of command blocks that are rectangular in shape and reporter blocks rounded in shape.

Command Blocks

Write Digital

This block allows you to select a pin and set its output to either a one or zero. It has two parameters. The first is a drop-down list of valid PINs. The second parameter is the output value. It also is a drop-down list and contains the values zero and one.

Write PWM

This block allows you to select a pin and set its PWM output to be a value between 0 and 100%. It has two parameters. The first is a drop-down list of valid PINs. The second parameter allows you to fill in a PWM value. If you use a PWM value of less than zero, it will be set to 0 internally. If you set the value to greater than 100, it will be set to 100.

Tone

If you connect a Piezo type buzzer to a pin, this block will generate a tone on the pin for the frequency and duration specified. It contains three parameters. The first is a drop-down list of valid PINs. The second allows you to specify the frequency of the tone in Herz. The third parameter specifies the tone duration in milliseconds. If a value greater than 5000 is entered, the value will be set to 5000 internally, limiting the maximum playing time to 5 seconds.

Write Servo

This block allows you to control the angle of a servo motor. It contains two parameters. The first is a drop-down list of valid PINs. The second specifies the angle in degrees. The value is limited to be between 0 and 180.

Reporter Blocks

Read Digital

This block allows you to read the current state of a digital input pin. It has one parameter, a drop-down list containing all the valid PINs. It reports a value of zero or one.

Read Analog

This block allows you to read the current state of an analog input pin. It has one parameter, a drop-down list containing all the valid Pins. It reports a value between 0 and 1023.

Read Sonar

This block allows you to connect an HC-SR04 type device. It has two parameters, both containing a drop-down list of valid PINs. The first parameter allows you to select a trigger pin, and the second an echo pin. It returns the measured distance in centimeters.