
humanoido
Taiwan
Asked
— Edited

The new Ultrasonic Sensor wiring does not look the same as the manual (see link & photos). It appears the echo & trigger wires are swapped. Looking inside the detector, green is on Trigger and white is on Echo. Looking at the manual, Green is Echo and white is Trigger.
www.ez-robot.com/Tutorials/Help.aspx?id=50
P.S.... if you're talking about the new model ping that uses only 3 wires.... It uses the same pin for trigger and echo... plug n' play so just plug it directly into one digital port
@DJ Sures: is the error on the Ultrasonic detector or the manual?