2.3 Ultrasonic Sensor

The ultrasonic sensor measures the distance to an object using sound waves. It is a non-contact sensor and outputs the distance in centimeters or inches.

sheenbot∞ Ultrasonic Sensor

Example Applications:

Obstacle detection for autonomous robots
Liquid level monitoring in tanks
Proximity alert systems

2.3.1 Example Code for the Ultrasonic Sensor

Start by connecting the ultrasonic sensor to one of the available dual-pin ports using the provided Type-C cable.
The ultrasonic sensor requires both a TRIG and ECHO data line. Choose a port with two pins such as (P14/P13) or (P1/P0).
Drag a ScreenDisplay block to your workspace first.
Next, drag the read ultrasonic sensor unit function from the code blocks section and insert it inside the ScreenDisplay block.
From the dropdown menus in the read ultrasonic sensor unit block:
- Set TRIG to P1 and ECHO to P0 if the sensor is connected to the P1/P0 port.
- Alternatively, set TRIG to P14 and ECHO to P13 for the P14/P13 configuration.
This setup will:
- Continuously measure the distance to an object in front of the sensor
- Display the real-time distance value on the screen

_{Figure 2.3.1a: Ultrasonic sensor reading displayed using block-based code}