While security cameras do a decent job of passively monitoring background activities, they do little to deter intruders or prevent emergencies like fire, flood or theft. Of course, you can always call 9-1-1 in case an unfortunate event occurs, but shouldn’t security be more proactive, rather than being simply reactive? I'll teach you how to make an improved system that will send instant SMS alerts to the preconfigured mobile numbers in case of an emergency, and function normally even if the electrical or network cabling of your home is cut-off (since it runs on GSM network). Here’s What You’ll Need