HC-SR04 and Makeblock MegaPi board

Projects Programming
1

I bought Makeblock Ultimate 2 robot. I built Robotic Arm Tank. I installed on it 2 ultrasonic sensors HC-SR04 but I can not make them work.

Here is my test code:

#include <NewPing.h>
#include <Arduino.h>
#include <Wire.h>
#include <SoftwareSerial.h>
#include <MeMegaPi.h>

//this is a code for using a 4 pin hc sr04 sensor as a 3 pin ping sensor By robobot3112

#define TRIGER_PIN 10 // Arduino pin for both trig and echo
#define ECHO_PIN 11
NewPing sonar(TRIGER_PIN, ECHO_PIN );

void setup() {
Serial.begin(115200);
}

void loop() {
delay(50); // Wait 50ms between pings (about 20 pings/sec). 29ms should be the shortest delay
unsigned int dist = sonar.ping_cm(); // Send ping, get distance in whole centimeters.
Serial.print("Ping: ");
Serial.print(sonar.ping_cm()); // distance in whole centimeters
Serial.println("cm"); }

I connected the sensor also with a bread-board and DuPont wires to be sure that all the 4 pins are connected where they have to be.

But I get only "0 cm".

In the final I have to make HC-SR04 to work only with 3 pins (trigger pin and echo pin connected together).

Please help me to discover what I am missing.
The robot is intended to be a Christmas gift for my grand son and Christmas is already next corner and I am a little desperate.
Thanks.

2

I succeed to find myself a resolution.
Instead of "TRIGER_PIN 10" must be "TRIGER_PIN A10" and
instead of "ECHO_PIN 11" must be "ECHO_PIN A11".
This was all.
Now is working like a charm.