To create the alarm you need some components. When we bought this components, we wanted to keep the cost down. So we spend a lot on eBay and bought from Asian countries. Below you will find all the components and if you click on read more you can get more information about them.
UBLOX Neo 6-m GPS
SIM800L GPRS GSM
what you need more
To protect all diods you need resistors. You need 5 resistors with 220 ohm.
You need an powerful siren to make some noise when the alarm goes on. Recommended is at least 100 db.
You need an trim pot to handle the text visibility on the LCD display.
You need some good boxes to place all the components in.
Some kind of switch that turns on the alarm if the control box and the system box is open.
Prototype or use ours pre made PCB card to solder all the components on.