Micro:bit Ultrasonic Rangefinder

Ultrasonic rangefinder

This sensor measures distance using the return time after ultrasonic waves are emitted.

Micro:bit Ultrasonic Distance sensor (HC-SR04P)

  1. Please use the HC-SR04P (or HC-SR04+) sensor for 3V and 5V. Please note that 5V-only HC-SR04 will not operate.
  2. Connect the sensor’s Trig terminal to pin 1 and the Echo terminal to pin 2 of the micro:bit.
  3. Since the HC-SR04P sensor is an inexpensive sensor used for textbooks, we cannot expect precise measurement values.
  4. It is recommended that the sensor look directly at the object being measured. If it is pointed at an angle, the emitted sound waves will be scattered, reducing the sensor’s accuracy.
  5. You have to connect a 5V USB power source. (3V battery cannot be used)
  6. Micro:bit only works with v2.00 or later products.
  7. Please use the Chrome browser if possible. It may not work in the in-app browser of social media (e.g. Facebook).
  8. It works on a PC or Android device that supports Bluetooth. Operation on Apple devices is not guaranteed.
  9. This app consumes a lot of CPU resources. Make sure your smart device’s CPU performance is good enough.
  10. Firmware installation is required on the micro:bit for first use. Click the ‘Firmware Download’ link to install it on your micro:bit. You don’t need to access ‘makecode.microbit.org’ since you just need to save the file to the microbit folder.Firmware Download
  11. If the connection to the micro:bit is successful, ‘U'(Ultrasonic) will be displayed on the micro:bit’s LED.
  12. If the connection doesn’t work, turn the micro:bit completely off and back on, or click the reset button on the back.