INTRODUCTION

I have made a simple device called "Intruder Detection Calling System" using arduino. This device sends a call on the telephone number feeded in the code, whenever it senses any movement. It is a portable device which can be easily installed on the main gate of the house. It is useful when the residents have gone out and the house is empty. In such a scenario, if somebody tries to break in, my device can sense movement and alert the owner by sending a call on his mobile phone.

Step 1: Material Required

Arduino uno / nano - I have used arduino nano in my device but it should work perfectly with arduino uno as well.
A bread-board for mounting arduino nano
PIR sensor
SIM900 GSM/GPRS MODEM W/RS232
A SIM card
Some male to female wires
A 9 Volt battery
9V battery cap with DC barrel

I bought all these materials from Makerskart.

Step 2:

The number of the SIM card that you'll be using in the device should be saved in the contact list of the house owner. It can be saved as " Somebody's trying to break in" or "Alert!!" or whatever the owner feels like.

Step 3: Assembling the Device

Connecting SIM900 GSM/GPRS MODEM W/RS232 with Arduino

SIM900 GSM/GPRS MODEM W/RS232 -- Arduino

RX -- D10

TX -- D9

GND -- GND

Connecting PIR Sensor with Arduino

PIR Sensor -- Arduino

VCC -- 5 V

OUT -- D5

GND -- GND

Step 4:

After the wiring is complete, insert the SIM card in SIM900 GSM/GPRS MODEM W/RS232.
Power the SIM900 GSM/GPRS MODEM W/RS232 with the help of the 9V battery.
Once powered, the green LED on the MODEM blinks repeatedly. However, when the MODEM detects a mobile network, the green LED on it blinks once in every 3 seconds. Now, the MODEM is ready for use.
Next, power the arduino.