Ultrasonic Sensor

The ultrasonic sensor can be used to measure distances

Use it to prevent robots from crashing, detect people approaching and much more!

Tutorial

Watch this video for a complete tutorial:

Wiring

Connect the special cable to the ultrasonic sensor. The red wire should connect to the VCC pin:

Wiring

Attach the cable to the Edge Connector or Motor Controller board as follows:

Ultrasonic	Microbit	Purpose
Trig (white wire)	P14 3-pin connector	Trig (make an ultrasound signal)
Echo (brown wire)	P16	Echo (listen for an ultrasound signal)

Code

You don't have to use pins P14 and P16. You can use any Digital pin. Just remember to adjust your code accordingly.

Coding

Add this extension:

Code

Enter this code in forever:

Code

The Serial blocks can be found in Advanced.

Download the code to the microbit.

To see the data, click on Show data Device:

Code

You should see some numbers and a graph. These show the distance readings in cm. Place you hand in front of the sensor and move it back and forth. The readings should show how far your hand is from the sensor.

Code

You could also try this, to show when an object approaches close to the sensor:

Code