Published August 1, 2017 © GPL3+

PHPoC - Detect Someone Taking Your Stuff and send Gmail

When your stuff is being taken away by a thief, PHPoC makes an alert and sends a notification to you via Gmail.

BeginnerShowcase (no instructions)2 hours3,315

Things used in this project

Hardware components

PHPoC Blue

SparkFun Force Sensor

Warning Lights & Electric Horns

PHPoC 4-Port Relay Expansion Board (S-type or T-type)

DIYables Resistor

DIYables Jumper Wires

Story

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

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.

Force sensor (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.

To buy electronic components, you can order them from DIYables

Code

Main task (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("ypur_account@gmail.com", "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("receiver_account@gmail.com", "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");
	}
}

?>