// Example NewPing library sketch that does a ping about 20 times per second. #define TRIGGER_PIN 11 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 12 // Arduino pin ...

#define TRIGGER_PIN 2 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 3 // Arduino pin tied to echo pin on the ultrasonic sensor. #define MAX_DISTANCE 200 // Maximum ...