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Test Ultrasonic Module

PiCar-X has a built-in Ultrasonic Sensor module that can be used for obstacle avoidance and automatic object-following experiments. In this lesson the module will read a distance in centimeters (24 cm = 1 inch), and Print the results in a Debug window.

TIPS

../_images/sp210512_114549.png

The Ultrasonic get distance block will read the distance from the PiCar-X to an obstacle directly ahead.

../_images/sp210512_114830.png

This program is simplified with a Variable. For example, when there are multiple functions in a program that each need to use the distance to an obstacle, a Variable can be used to report the same distance value to each function, instead of each function reading the same value separately.

../_images/sp210512_114916.png

Click the Create variable… button on the Variables category, and use the drop-down arrow to select the variable named “distance”.

../_images/sp210512_114945.png

The Print function can print data such as variables and text for easy debugging.

../_images/debug_monitor.png

Once the code is running, enable the debug monitor by clicking the Debug icon in the bottom left corner.

EXAMPLE

Note

  • You can write the program according to the following picture, please refer to the tutorial: How to Create a New Project?.

  • Or find the code with the same name on the Examples page of the EzBlock Studio and click Run or Edit directly.

../_images/sp210512_115125.png