Simple_MaxSonarLibrary_OK.ino

/*  http://playground.arduino.cc/Main/MaxSonar
  Maxbotix simple test

  Instructions:
  - At least one of: (comment the appropriate code below)
    * PW is digital pin 8
    * TX is digital pin 6
    * AN is analog pin A0
  - Change code below according to your model (LV, XL and
  HRLV supported)

  Note:
  For convenience, the getRange method will always return centimeters.
  You can use convert fuctions to convert to another unit (toInches and
  toCentimeters are available)

*/
#include "Maxbotix.h"

#define DEBUG 1

#define VIBE 7     // attach Vibe motor to pin n°
#define VIBELENGHT 100     // 
#define VIBEPAUSE 200     // 

Maxbotix rangeSensorPW(8, Maxbotix::PW, Maxbotix::LV);

int distancePrevious;  

void setup()
{
  pinMode(VIBE, OUTPUT);
  
  Serial.begin(9600);
}

void vibe1(int repeat)
{
     //  più è vicino più volte vibra
      for(int i=0; i<repeat; i++){
#ifdef DEBUG
    Serial.print("\t\t<<\t - VIBRA 1- \t>>");
#endif 
        digitalWrite(VIBE, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(VIBELENGHT);              // vibe a moment
        digitalWrite(VIBE, LOW);    // turn the LED off by making the voltage LOW
        delay(VIBEPAUSE);              // wait a moment (for multiple vibes)
      }      
}

void vibe2(int frequence)
{
     //  vibra con impulsi diversi
#ifdef DEBUG
    Serial.print("\t\t<<\t - VIBRA2 - \t>> freq. - ");
    Serial.print(frequence);
#endif 
        digitalWrite(VIBE, HIGH);   // turn the LED on (HIGH is the voltage level)
        delay(VIBELENGHT);              // vibe a moment
        digitalWrite(VIBE, LOW);    // turn the LED off by making the voltage LOW
        delay(int(VIBEPAUSE/frequence));              // wait a moment (for multiple vibes)
}


void loop()
{
  const int triggerFar     = 120;
  const int triggerBetween =  70;
  const int triggerNear    =  30;

  int beep=0;
  unsigned long start;

  int distance;
  
  // PW
  start = millis();
  distance = int(rangeSensorPW.getRange());  //  Centimeters
  
#ifdef DEBUG
  Serial.print("Reading...\t");  
  Serial.print("PW: ");
  Serial.print(distance);
  Serial.print(" - ");
  Serial.print(distancePrevious);
  Serial.print("cm - ");
  Serial.print(millis() - start);
  Serial.print("ms");
#endif 


    if (distance < triggerFar){
      beep = 1;
      if(distance < triggerBetween){
        beep = 2;
        if (distance < triggerNear){
          beep = 3;
        }
      }
      
     //  vibra / suona / fai qualcosa di spettacolare: è il tuo momento !!!
     vibe2(beep);

    }      

 
  distancePrevious = distance;
  
#ifdef DEBUG
  Serial.println(" ");
#endif 
 
//  delay(100);
}