#define TRIGGER_PIN 12 // Arduino pin tied to trigger pin on the ultrasonic sensor. #define ECHO_PIN 11 // Arduino pin tied to echo pin on the ultrasonic sensor. # ...

// 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 ...