If I were to install window motion sensors, glass break sensors, door sensors, and cameras, I’ve basically got my own home security system. But how would you go about mimicking the remote monitoring functions that a company such as ADT or SimpliSafe would do?
The type where if your alarm goes off, you get a phone call and are asked for your code word, and if you give the incorrect code word, the police are summoned or whatever.
While you could certainly set something up to call 911 automomously, I would personally recommend against, since now all liability for false calls lands on you.
In my instance, I use the Alarmo card, which has the option to enter a pin to disarm (and even physical keypads) , and pushes a emergency notification to all phones