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libraries/NewPing/examples/NewPing3Sensors/NewPing3Sensors.ino

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+// ---------------------------------------------------------------------------
+// Example NewPing library sketch that pings 3 sensors 20 times a second.
+// ---------------------------------------------------------------------------
+
+#include <NewPing.h>
+
+#define SONAR_NUM 3      // Number of sensors.
+#define MAX_DISTANCE 200 // Maximum distance (in cm) to ping.
+
+NewPing sonar[SONAR_NUM] = {   // Sensor object array.
+  NewPing(4, 5, MAX_DISTANCE), // Each sensor's trigger pin, echo pin, and max distance to ping.
+  NewPing(6, 7, MAX_DISTANCE),
+  NewPing(8, 9, MAX_DISTANCE)
+};
+
+void setup() {
+  Serial.begin(115200); // Open serial monitor at 115200 baud to see ping results.
+}
+
+void loop() {
+  for (uint8_t i = 0; i < SONAR_NUM; i++) { // Loop through each sensor and display results.
+    delay(50); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay between pings.
+    Serial.print(i);
+    Serial.print("=");
+    Serial.print(sonar[i].ping_cm());
+    Serial.print("cm ");
+  }
+  Serial.println();
+}