title: Ultra sonic sensor always shows same distance
body: <p>I tried to bulid up an ultra sonic sensor and followed this tutorial: <a href="https://www.thestrongestlink.nl/2020/05/31/ultrasonic-sensor-for-the-jetbot/#comment-90" rel="nofollow noreferrer">https://www.thestrongestlink.nl/2020/05/31/ultrasonic-sensor-for-the-jetbot/#comment-90</a></p>
  <p>In the picture below you can see my wiring.<a href="https://i.stack.imgur.com/fzVlo.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/fzVlo.jpg" alt="enter image description here" /></a></p>
  <p>I uploaded the code from the tutorial to my Feather M0. But when I start the software the display always shows 175 cm (sometimes it fluctuates from 174 to 176).</p>
  <p>So next I tried to find the problem. I measured the voltage: at VCC pin are 5V but at TRIG and ECHO is no voltage. I also used two other ultra sonic sensors to see if one is damaged but it is always the same problem.</p>
  <p>I dont know why there is no voltage at those two pins and also dont know what to do next or where can be the problem.</p>
  <p>Does anyone of you have an idea what to do or what can be the problem?
  Thanks</p>