### Grove Ultrasonic Ranger Example

Source: https://github.com/seeed-studio/seeed_arduino_ultrasonicranger/blob/master/README.md

This snippet demonstrates how to use the Grove Ultrasonic Ranger library in an Arduino sketch. It assumes the sensor is correctly connected and provides a basic example of reading distance values.

```Arduino
#include <Grove_Ultrasonic_Ranger.h>

// Define the digital pin connected to the SIG pin of the Grove - Ultrasonic Ranger
#define SIG_PIN 2

// Create an instance of the Ultrasonic Ranger
Ultrasonic_Ranger ranger(SIG_PIN);

void setup() {
  Serial.begin(9600);
}

void loop() {
  // Read the distance in centimeters
  long distance = ranger.getDistance();

  if (distance == -1) {
    Serial.println("Error: Could not read distance.");
  } else {
    Serial.print("Distance: ");
    Serial.print(distance);
    Serial.println(" cm");
  }

  delay(100);
}
```

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