alarmo VS noonlight-hass

I just did this with our ancient system. I replaced the keypads with Ring Alarm Keypads v2 which connected to my Home Assistant server via Zwave and stay in sync with the Alarmo custom integration using this Blueprint. It all works great and was much easier than expected to switch over.

If you have an existing Ring security system, you can either integrate all of it's sensors and alarm control with Home Assistant via Ring MQTT or get your own ZWave hub, connect all the sensors to that, and use Alarmo to create your own security system. I'm doing the former since I want to pay for the peace of mind that comes from a professionally monitored security system, but can switch to the latter if Amazon gets too greedy.

Never before heard of Alarmo.

As others have mentioned, you can replace the ADT mainboard with Konnected. From there, expose your now Konnected hardwired sensors to Home Assistant and setup an alarm system using the Alarmo integration. Expose that all to HomeKit.

Check out Alarmo if you use Home Assistant: https://github.com/nielsfaber/alarmo

I had a hardwired security system in the house I purchased and I replaced the main panel/board with Konnected Alarm Panel Pro. All of the existing hardwired sensors (doors, windows, motion and siren) are then integrated with Home Assistant. I use Alarmo, an alarm integration for Home Assistant, to create an alarm system which is then exposed to HomeKit, also via Home Assistant.

another option, depending on your use case, is to replace the alarm entirely with an open source solution. Alarmo for the software side, and Konnected.io for the replacement alarm board are the first things that come to mind.

As a side note, Home Assistant also runs my home security system as well. I used the Konnected Alarm Panel Pro to re-use existing hardwired sensors from an older security system that was already in place. I then used the Alarmo integration for Home Assistant which basically makes setting up an alarm system a breeze.

Alarmo

The combination of all this is a completely locally controlled security system with the flexibility to do essentially anything I want. Professional monitoring is also possible using the Noonlight Home Assistant integration but I haven't found a need for it yet. I also have a backup ISP setup using a T-Mobile 500mb plan for $5/month that if my primary ISP is down, my mini PC server that runs Home Assistant (which includes my security system) falls back to the backup T-Mobile ISP.

There is an option to get "professional monitoring" through the noonlight-hass custom component for HA. From what I can tell, it just creates a switch in HA that you can automate so when your alarm is triggered, enable the switch which will notify the monitoring center Noonlight uses.

Noonlight: https://github.com/konnected-io/noonlight-hass