Step 2: Parts List
1 SR04 Ultrasonic Sensor
4 Jumper Wires
Step 3: Connect Ultrasonic Sensor to Arduino
1 From the SR04 VCC pin to the Arduino 5v
1 From the SR04 GND pin to the Arduino GND
1 From the SR04 TRG pin to the Arduino Digital pin 12
1 From the SR04 ECHO pin to the Arduino Digital pin 11
That's All The wireing you need... Easy, no?
Next Step, load the Software library and sketches.
Step 4: Step 4 Download SR04 Library and install to Arduino IDE
I found an optimized library here
Download the library unzip it, and install it in the Arduino IDE. Place it inside your Arduino libraries folder , and restart the Arduino IDE. For convenience, I included the file in the files section below.
You should now be able to see the library and examples in select File > Examples > NewPing > NewPingexample sketch.
load the sketch to your Arduino.
If you were successful at installing the libraries, and loading the NewPingexample sketch, Compile the sketch by clicking on the verify button and make sure there are no errors.
It's time to connect your Arduino to your PC using the USB cable. Click on the upload button to upload the sketch to the Arduino.
Once uploaded to the Arduino, open the serial monitor, and you should see the distance data stream coming from the sensor.