Step detection system by a way with Arduino

Description

The purpose of the project is to detect the passing of cars and people at the entrance to an orchard and a warning beep inside this house.
For this project it consists of 2 modules:

• Module detection step, either of people or cars.
• Module warning step.

The requirements are:

• The step detection module, being in the garden, must have a separate power supply, in this case we have put a solar panel and a battery.
• The module must sound warning when the detection module warn you.
• The detection module is at the entrance of the garden.
• The warning module is inside the house.

Instructions

Components used

The components used have been:

• Detection module
  • Arduino Nano
  • PCB 5x7 cm
  • 3W Solar Panel 138x160
  • Battery 3.7 v 6600 mAh
  • LiPo Rider Pro
  • Step up power converter module 3.3v to 5v
  • Ultrasonic Module Distance Measuring Transducer Sensor Waterproof JSN-SR04T
  • APC220 RF wireless modules
• Warning module
  • Arduino Nano
  • PCB 5x7 cm
  • Ultrasonic Module Distance Measuring Transducer Sensor Waterproof JSN-SR04T
  • Passive buzzer / relay.

Assembly of the circuit

The Fritzing scheme is as follows:

• Detection module

In this scheme has not been added to the connection part of the Lipo Rider Pro, battery and solar panel, I not to have the designs for Fritzing.

• Warning module

Images of the system mounted inside the laboratory:

• Detection module

• Warning module

Software

The libraries used have been:

• HCSR04Ultrasonic

The code of the Arduino is the following:

• Detection module

/*
  T�tulo: Modulo_RF_APC220 --> Puerto serie
*/

#include <Ultrasonic.h>

//Pins ultrasonido
const int TRIG_PIN = 12;
const int ECHO_PIN = 13;

Ultrasonic ultrasonic(TRIG_PIN, ECHO_PIN);

void setup()
{
  Serial.begin(9600); // Establecemos la velocidad del puerto serie (Igual que APC220)
}

void loop()
{

  float cmMsec;
  long microsec = ultrasonic.timing();
  cmMsec = ultrasonic.convert(microsec, Ultrasonic::CM);

  Serial.print(int(cmMsec));
  Serial.println("=");

  delay(1000);

}

• Warning module

// create notes for our song
int C = 131;
int D = 147;
int E = 165;
int F = 175;
int G = 196;

// create an array to hold note values
int songNotes[] = {E, E, E, E, E, E, E, G, C, D, E, F, F, F, F, F, E, E, E, G, G, F, D, C};
// create another array to hold note lengths
int noteDurations[] = {4, 4, 2, 4, 4, 2, 4, 4, 4, 4, 1, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 4, 1};

byte byteRead;  //Datos le�dos por el puerto serie
long longitud;  //Longitud recibida por el puerto serie

long longitudMaxima = 100;

String inString = "";                          //This string is used to store the incoming data
unsigned int pitch;                            //This is the variable we will use to store the buzzers p

void setup()
{
  Serial.begin(9600);

  longitud = 0;
}


void loop()
{

  while (Serial.available() > 0)
  {
    byteRead = Serial.read();

    //listen for numbers between 0-9
    if (byteRead > 47 && byteRead < 58) {
      //number found
      longitud = (longitud * 10) + (byteRead - 48);
    }

    if (byteRead == 61)
    {
      Serial.println(longitud);

      if (longitud <= longitudMaxima)
      {
        melodia();
      }

      longitud = 0;
    }

  }


}


void melodia()
{
  // iterate through arrays to play each note for its duration
  // plays our jingle once
  for (int i = 0; i < 24; i ++)
  {
    // calculate note duration
    // 1 second divided by note length
    // adjusting value of 1000 can change tempo
    int noteDuration = 1000 / noteDurations[i];
    // sends tone to pin 8
    tone(8, songNotes[i], noteDuration);

    // pause between notes a little to hear them better
    // this can also be used to adjust tempo
    int pauseBetweenNotes = noteDuration * 1.3;
    delay(pauseBetweenNotes);
    // once note is done, stop playing it
    noTone(8);
  }
}