I am using sensors in a project I have, but I want to check and make sure they both work, however, as soon as I open the serial monitor I am greeted with the distance being all zeros. I hope someone can explain. I have the TrigPin wired the second IO port and the EchoPin wired to the first. Heres th…

Big problems with HC-SR04 Ultrasonic sensor

UKHeliBob April 17, 2018, 10:43pm 4

Not a good idea to use pin 1 for the sensor as it is used by the Serial interface

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