PHPoC - Detect Someone Taking Your Stuff

[Khanh]

Introduction

In this project, I am going to show you how to detect someone stealing your valuable stuff. If detected, PHPoC sends a notification via Gmail and makes an alert sound and light.



Demonstration

Things Used In This Project

• PHPoC Blue
• Force Sensor
• Resistor 3.3k ohm
• PHPoC 4-Port Relay Expansion Board (T-type)
• Warning Lights & Electric Horns
• Jumper wires

Wiring Diagram

• Stack PHPoC Relay Board on PHPoC Blue
• Connect Force sensor to PHPoC Blue as below image.
• Connect Warning Lights & Electric Horns to port 0 of Relay Board

Detecting Something is Taken Away

To detect treasure present or not, I put the treasure on the force sensor. This sensor let us know how heavy the treasure is. If output value of sensor is below a threshold, it means the treasure is not present and someone took it away.

Electronic part is hidden below table



Laptop overlays force sensor




Electronic part should be hidden under table.

Handling Event

If event is detected, PHPoC will make an alert sound and light, and send a Gmail notification to owner.

Source Code

<task0.php>

<?php

if(_SERVER("REQUEST_METHOD"))
    exit; // avoid php execution via http request

include_once "/lib/sd_340.php";
include_once "/lib/sn_dns.php";
include_once "/lib/sn_esmtp.php";
include_once "/lib/sd_spc.php";

define("THRESHOLD", 50); // in ADC value

function send_gmail()
{
    esmtp_account("[email protected]", "PHPoC");
    esmtp_auth("your_account", "your_password");
    esmtp_msa("smtp.gmail.com", 465);

    $time = date("Y-M-d H:i:s", time());

    $subject = "Alert: Your treasure is being taken away";
    $message  = "Location: Planet Earth\r\n";
    $message .= "Time: $time\r\n";
    $message .= "Your treasure is being taken away\r\n";

    $msg = esmtp_send("[email protected]", "Boss", $subject, $message);

    if($msg == "221")
        return true;
    else
        return false;
}

spc_reset();
spc_sync_baud(115200);
adc_setup(0, 0); // adc0, channel 0

$obj_present = false;

while(1)
{
    $adc_in = adc_in(0, 30);

    if($adc_in < THRESHOLD)
    {

        if($obj_present)
        {
            //Alert
            spc_request(14, 4, "set 0 output high");
            // send notification
            while(!send_gmail())
                ;

            $obj_present = false;
        }
    }
    else
    {
        $obj_present = true;
        spc_request(14, 4, "set 0 output low");
    }
}

?>