alarmo VS pi-mqtt-gpio

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

Home Assistant doesn't have direct control of GPIOs built-in anymore, but it's available with either a custom component or MQTT.

If you want to play around with sensors on a RPi, you can use your existing network and use MQTT to communicate back to your hub. Take a look at https://github.com/flyte/mqtt-io.

If you install this on the RPI, https://github.com/flyte/mqtt-io setup the digital output to turn the relay on and off and add the HA discovery option, then it will show up as an MQTT switch in Home Assistant and you can turn it on and off from HA

I currently use ESP devices with sensors attached in my house however you may be able to use a Raspberry Pi instead and have certain sensors such as Temperature, PIR motion etc ... https://github.com/flyte/pi-mqtt-gpio

I have the raspberry pi just running rasbian. I'm using pi-mqtt-gpio to expose the GPIO to MQTT, which then allows HA to pick them up and control them. I went through a few iterations trying to get that to work, including using the remote_pi_gpio integration, but had problems with it. With the integration, every time the pi restarted, HA would need to be restarted to re-establish the connection, and there were times that the GPIO settings on the pi would get reset and HA would lose them. With the pi-mqtt-gpio, it's been way easier and way more stable. I can boot the pi or HA in either order and the connection will still come up every time I've tried. If you're going to do remote gpio with a pi, I definitely recommend it. The MQTT integration in HA picks up the gpio automatically, so there's no HA configuration to be done. My pi-mqtt-gpio configuration: https://imgur.com/imTnUvX