Ultrasonic Ranger malfunction


#1

I purchased a GoPiGo2 starter kit a few months ago which came with an ultrasonic sonar. After assembling it I noticed the sonar reading in very strange values that didn’t make since in relation to what it should have been sensing. It could not recognize when a large sheet of paper was inches from it and would output the distance 681 semi-regularly.

Fortunately I had also purchased a GrovePi IoT kit along with my GoPiGo2 starter kit and had an extra sonar. So I replaced the original sonar and immediately noticed a difference. The new sonar read in distances properly and operated completely as expected. After less than 2 months very infrequent use the “newer” sonar has begun to malfunction. Sometimes it performs normally other times it reads in very large distances while moving towards a “target” or will be stationary reading in the same distance and all of sudden read 0.

This is my 2nd sonar and I’m very disappointed that 2 of these sensors have failed in the same manner within months (one arrived “broken”). I have changed the Grove cables hoping the issue might lie there, but it did fix anything. I have been trying to perform some experiments that require the sonar and can now no longer do so. Can someone offer guidance, assistance, support, new parts?


#2

Hey cjirvene,
I’m really sorry for the frustration. We have not heard about the ultrasonic sensors giving a bad reading in a few months. We’ll replace the sensor that you had received broken. Can you tell us a bit more about what all examples and projects had you tried with the ultrasonic sensor and was there a particular program after which you started noticing the bad readings.

Can you contact us here, under “General Questions and Feedback”: http://www.dexterindustries.com/site/?page_id=65 and give us the order ID. We will have one shipped to you immediately.

Again, I’m really sorry to hear about this; we’ll make it right immediately.
-Karan