Ultrasonic sensor HC-SR04

5 months 3 weeks ago #29535588 by Harold123
I am trying to interface HC-SR04 ultrasonic sensor with arduino. I am making use of the NewPing Library.But then on the serial monitor, it keeps printing some unknown characters and not the distance.
Please help.

There is a project of  HC-SR04 ultrasonic sensor with Raspberry Pi3

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