10. Ultrasonic¶
In this project, you will learn how to read the distance detected by the ultrasonic module.
How to do?
The ESP32-CAM and the Arduino board share the same RX (receive) and TX (transmit) pins. So, when you’re uploading code, you’ll need to first disconnect the ESP32-CAM to avoid any conflicts or potential issues.
Open the
10_ultrasonic.ino
file under the path ofzeus-car-main\examples\10_ultrasonic
.After the code is uploaded successfully, slide the power switch to ON to start the Zeus Car.
Note
Do not unplug the USB in this step, because you need to check the data of the Ultrasonic module on your computer.
Open the serial monitor and make sure the current baud rate is set to 115200. It is recommended to click on the Toggle Autoscroll icon so that you can see the latest printed data.
You can view the printed data like
distance: 21.11 is_obstacle: 0
.If the distance of the obstacle ahead is within 20cm,
is_obstacle: 0
will becomeis_obstacle: 1
.