There’s a huge market for 433 MHz alarm system hardware out there ... From there, the code on the ESP can fire off using whatever API works for your purposes. In this case [Aaron] is using ...

Real Time Home Security System using GSM Technology-An Anti-theft System ... The circuit is highly-flexible so that you can use any SIM900A modem (and ofcourse any Arduino Uno board) of your choice.

As a preview of his latest book, Arduino Project Handbook: 25 Practical Projects to Get You Started, Mark Geddes takes us through the project to create a simple laser trip wire alarm. You've probably ...

Inspired by a Arduino based LIDAR system, [Berryjam] decided that he wanted to successfully use an affordable Open Source Laser RangeFinder (OSLRF-01) from LightWare. The article starts off by ...