MicroPython Forum (Archive)

Hi all!

Now I've received my ultrasonic sensors (the previous one died, so I orderer two new) I tested my lib for it

So here it is if anyone is interested on it: https://github.com/skgsergio/Micropytho ... rasonic.py

At the moment it only allows one sensor but I plan to make an object that could be initialized with the two pins for each sensor (till 15th July I'm kinda busy).

Hi Sergio,

I've updated your code to allow more than one sensor. I've made a pull request to your github project page.
I've tested this with two HR-SR04 sensors (added that as example code in the pull request). Do have a look and let me know if something's not working.

My fork of your project is available here: https://github.com/mithru/MicropythonLibs

If you think the update is fine, please do accept the pull request.

EDIT: For the benefit of anyone else reading this looking for the updated library, Sergio has merged the update. The library now features the following:

- multiple sensors accepted
- returns values in cm / inches

Final working library available here (with an example):
https://github.com/skgsergio/MicropythonLibs

I got my HC-SR04 working thank you very much. However I did have to make a change. I found that if there was nothing withing about 15 inches of the sensor I would end up in an endless loop waiting for the echo value to go to 0. I added a loop limit of 1000 iterations and that fixed the deadlock.

Also of note. I was using x1 and x2 for echo/trig but that would cause pyb.delay() to lockup. I switched to x7 and x8 and that fixed the problem.