12. Case 09: Autonomous Obstacle Avoidance
12.1. Purpose
The Cutebot avoids the obstacles automatically to move forward.
12.2. Materials
1 x Cutebot Kit
1 x Ultrasonic Sensor
12.3. Software Platform
12.4. Programming
Step 1
Click the “Advanced” to see more choices in the MakeCode drawer.
A codebase is required for Cutebot programming, click “Add Package” at the bottom of the drawer, search
Cutebot
in the dialogue box and download it.
Note: If you met a tip indicating incompatibility of the codebase, you can continue with the tips or build a new project there.
Step 2
Drag “go straight at full speed” brick into the
On start
brick.
Step 3
Set a
Sonar
variable to save the detectedCm
value in theForever
brick.If the detected value is between
2
and20
which means there is obstacle being detected in the front 20cm far, set the left wheel speed to0
and right to-50
, make a right turn at a random time to complete an obstacle avoidance.If not, move forward at its full speed.
Programming
Links: https://makecode.microbit.org/_h0KKu8aR5hgW
You can also download it directly below:
12.5. Result
The Cutebot moves forward at its full speed and will make a right turn to keep going if any obstacle being detected.
12.6. Exploration
Why should the detected value be over 2cm ?