It’s just a regular Zigbee button.
We only ever enter or leave the house thru one door at the back of our house so I put the button in an easily accessible but out of the way place close to the door.
I made my own since I hadn’t heard about Alarmo when I started creating the system.
I have Alarmo downloaded and I had planned to start playing around with it but I haven’t gotten around to it yet.
I have a bunch of Echo and Sonos devices for the media players. I also have an Aeotec door bell that can be triggered as a siren from HA and a Neo brand standalone siren.
I also use Twilio to send out text messages and phone calls to us (in case we aren’t home) and family if the alarm is triggered.
As triggering devices I use door/window sensors and, if we are both away, motion sensors for places where there shouldn’t be motion. Unfortunately we have cats that would set off motion sensors in most of the house so I only use motion sensors where they aren’t usually allowed.
So basically I have it set up so that if any of the sensors for the alarm are breached (either doors/windows for home mode or anything for away mode) then the alarm is triggered immediately (except for our normal access door then there is a 15 second delay to allow the alarm to be turned off).
When the alarm is triggered all the lights in the house turn on, the sirens blare, the media players make a loud announcement that people are being called (the announcement says police are called but I don’t have it tied to 911 - but the criminal doesn’t need to know that ), Twilio makes all of the texts and phone calls as desired and my security cameras start taking snaphots of all the coverage areas and sends those to our phones via pushbullet so even if everything gets stolen we still have at least some independent record of the people.
The alarm noises go on for a couple of minutes and then stop. If by that time the bad guys aren’t scared away then there isn’t much point in continuing.
Not every access opening is covered by a sensor - just the ones that I think will be more likely that a bad guy would find convenient to gain access thru. Ex no windows on the second floor have sensors and none of the windows that are on the street side have sensors since we live on a fairly busy street so I doubt a burglar would break in thru a window there.
There are definitely some gaps that aren’t completely locked down but at the end of the day, we don’t live in an area with a lot of crime so it’s not likely that we would need the alarm. But also as the saying goes “it’s better to have it and not need it rather than need it and not have it”.