Hello all,
I am familiar with working with arduino, however this is my first time working with making a robot. Long story short, I've a project in which I need to create a simple robot able to run using the Arduino v5.0 sensor shield (this one to be precise: here ) I have a few problems though for one thing when I hook up one Ultrasonic Sensor (HC-SR04) to the specificed place on the shield (according to the schematics URF01+ pins) however, when I try to run the example code from the NewPing library, it always returns 0cm or some gibberish in the serial monitor window and I've tested three of them on the shield. Could someone help me with this? I'm sure it isn't the shield, I've tested four motors on the other pins and they all worked fine.
// ---------------------------------------------------------------------------
// 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 200 // 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(50); // 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 in cm and print result (0 = outside set distance range)
Serial.println("cm");
}