A library that makes working with ultrasonic sensors easy. The NewPing library totally fixes these problems, adds many new features, and breathes new life into these very affordable distance sensors.

You can download the ‘NewPing’ library by clicking the ‘Download NewPing’ button which can be found on any of the project pages which use an ultrasonic sensor. You can also press the button below which will begin downloading a zip file automatically.

At its core, the HC-SR04 Ultrasonic distance sensor consists of two ultrasonic transducers. The one acts as a transmitter which converts electrical signal into 40 KHz ultrasonic sound pulses. The receiver listens for the transmitted pulses.

Applications of Ultrasonic Sensors Our ultrasonic sensors, made with piezoelectric crystals, use high frequency sound waves to resonate a desired frequency and convert electric energy into acoustic energy, and vice versa.

Ultrasonic sensors emit short, high-frequency sound pulses at regular intervals. If they strike an object, then they are reflected back as echo signals to the sensor, which itself computes the distance to the target based on the time-span between emitting the signal and receiving the echo. …

Under control of a host microcontroller (trigger pulse), the ECHO(PWM) sensor emits a short 40 kHz (ultrasonic) wave. This burst travels through the air, hits an object and then bounces back to the sensor.

Ultrasonic sensors work by sending out a sound wave at a frequency above the range of human hearing. The transducer of the sensor acts as a microphone to receive and send the ultrasonic sound. Our ultrasonic sensors, like many others, use a single transducer to send a pulse and to receive the echo.

The NewPing library is now VERY accurate and the code was simplified as a bonus. Smaller and faster code as well. Fixed some issues with very close ping results when converting to inches. All functions now return 0 only when there’s no ping echo (out of range) and a positive value for a successful ping.

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YES! The NewPing library is designed with multiple sensors in mind. It’s one of the reasons I created the library. With the other ping/ultrasonic libraries, if there’s no ping echo it waits a full second for the reply. During that time, the Arduino is doing nothing, it’s like a delay (1000).

You can now call them without an object. For example: cm = NewPing::convert_cm (distance); Help future development by making a small donation (the [email protected] payee is correct).