Hi there,

I have coded an Ultrasonic sensor to measure the distance of objects within arduino.

However, using processing, I am wanting to trigger numerous videos when a person is a certain distance away form the sensor (and then stop, not loop)

eg - 
50cm away - play video 1 
100cm away - play video 2
150 cm away - play video 3 
200 cm away - play video 4


I have searched the internet but can't seem to find anything that works? 

I'd like the video to be triggered more than once, so if a user walks closer it triggers a video, then if they decide to walk further away the other video can be triggered.

Hope so one can help. 


Here is my arduino code if it helps:

---

// ---------------------------------------------------------------------------
// Example NewPing library sketch that does a ping about 20 times per second.
// ---------------------------------------------------------------------------

#include <NewPing.h>

#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.
#define MAX_DISTANCE 400 // Maximum distance we want to ping for (in centimeters). Maximum sensor distance is rated at 400-500cm.

NewPing sonar(TRIGGER_PIN, ECHO_PIN, MAX_DISTANCE); // NewPing setup of pins and maximum distance.

void setup() {
  Serial.begin(115200); // Open serial monitor at 115200 baud to see ping results.
}

void loop() {
  delay(200);                      // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
  unsigned int uS = sonar.ping(); // Send ping, get ping time in microseconds (uS).
  Serial.print("Ping: ");
  Serial.print(uS / US_ROUNDTRIP_CM); // Convert ping time to distance and print result (0 = outside set distance range, no ping echo)
  Serial.println("cm");
}