Example Code for micro:bit-SR04 Ultrasonic Distance Sensor

Hardware Preparation

• micro:bit V2,
• MBT0042 expansion board,
• SR04 ultrasonic module (not included, need to purchase independently),

Software Preparation

1. Enter the MakeCode programming platform in browser: https://makecode.microbit.org/
2. Create a new project and name it.
3. Load in the program library of xia_mi board: click “setting”, and “expansion” in turn, then paste this link in the search box: https://github.com/DFRobot/pxt-DFRobot_xia_mi_Board.

Wiring Diagram

Insert the SR04 ultrasonic sensor into the interface (as shown in the figure below):

Sample Code

MakeCode Program Link: https://makecode.microbit.org/_0K01rcdXf0y1