HC-SR04-Pi

HC-SR04-Pi is a module for distance measurement with a Raspberry Pi via a HC-SR04 sensor.

Usage

In order to use HC-SR04-Pi you have to make sure pigpio is installed:

sudo apt-get update
sudo apt-get install pigpio

Since the HC-SR04-Pi module uses pigpio there are some limitations:

A limitation of the pigpio C library is that it can only be used by a single running process.
The pigpio C library requires root/sudo privileges to access hardware peripherals.

This means you have to run your program with root/sudo privileges aswell!