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Smart Alarm Systems

Alarm Security DIY

A smart alarm system protects your home with door sensors, motion detectors, sirens and notifications - all integrated with Home Assistant for full control and automation.

🏠 Alarm System Overview

Section titled “🏠 Alarm System Overview”

Product Comparison

Section titled “Product Comparison”
SystemHA IntegrationLocal?PriceSubscription
Konnected Pro✅ ESPHome✅ Yes💰💰❌ No
Alarmo✅ HACS✅ YesFree❌ No
SimpliSafe✅ Native❌ Cloud💰💰Optional
Abode✅ Native❌ Cloud💰💰Optional
Ring Alarm⚠️ HACS❌ Cloud💰💰Optional

🏆 Konnected Alarm Panel Pro (Recommended DIY)

Section titled “🏆 Konnected Alarm Panel Pro (Recommended DIY)”

Price: ~$189 (6-zone), ~$249 (12-zone Pro)

Works with Home Assistant certified! ✅

Reuse your existing wired sensors from an old alarm system:

  • ✅ ESP32-based with ESPHome firmware
  • ✅ WiFi, Ethernet and PoE support
  • ✅ 6-12 zones for sensors
  • ✅ Siren and strobe outputs
  • ✅ Local control, no cloud
  • ✅ No monthly fees
  • ✅ Standalone alarm mode (Nov 2024)

Buy: Konnected.io

🛡️ Alarmo (HACS - Recommended)

Section titled “🛡️ Alarmo (HACS - Recommended)”

Price: FREE (open source)

The best way to build an alarm system in Home Assistant:

  • ✅ Complete UI-based setup
  • ✅ No YAML required
  • ✅ 4 modes: Home, Away, Night, Custom
  • ✅ User codes with different permissions
  • ✅ Entry/Exit delays
  • ✅ Push notifications
  • ✅ Zones and sensor groups
  • ✅ Beautiful Lovelace alarm panel card

GitHub: github.com/nielsfaber/alarmo

📱 SimpliSafe (Native HA)

Section titled “📱 SimpliSafe (Native HA)”

Price: ~$200-500 Subscription: $0-30/month (optional)

Native Home Assistant integration with 1,397+ users:

  • ✅ Alarm control panel
  • ✅ All sensors as entities
  • ✅ Door lock support
  • ✅ Siren status
  • ✅ Event triggers (doorbell, etc.)
  • ❌ Cloud-based (requires internet)
  • ❌ Requires MFA enabled

Sensor support:

  • Door/window sensors
  • Motion sensors
  • Glass break sensors
  • CO detectors
  • Smoke detectors
  • Water leak
  • Freeze sensors

Buy: SimpliSafe.com

🏡 Abode

Section titled “🏡 Abode”

Price: ~$200-400 Subscription: $0-25/month

Most smart home compatible:

  • ✅ Native HA integration
  • ✅ Apple HomeKit support
  • ✅ Google Home
  • ✅ Amazon Alexa
  • ✅ Z-Wave and Zigbee radios
  • ✅ IFTTT integration
  • ❌ Cloud-based

Buy: Goabode.com

🔔 Ring Alarm

Section titled “🔔 Ring Alarm”

Price: ~$200-350 Subscription: $0-20/month

Amazon ecosystem:

  • ✅ Deep Alexa integration
  • ✅ Z-Wave sensors
  • ✅ Video doorbell integration
  • ⚠️ No native HA integration
  • ⚠️ Requires HACS/MQTT
  • ❌ Cloud-based

Buy: Ring.com, Amazon

🤖 Smart Automations

Section titled “🤖 Smart Automations”

Complete Alarm Automation Suite

Section titled “Complete Alarm Automation Suite”
automation:
  # ===== AUTO ARM/DISARM =====


  # Arm Away when everyone leaves
  - alias: "Alarm - Auto Arm Away"
    trigger:
      - platform: state
        entity_id: group.family
        to: "not_home"
        for: "00:05:00"
    condition:
      - condition: state
        entity_id: alarm_control_panel.alarmo
        state: "disarmed"
    action:
      - service: alarmo.arm
        data:
          entity_id: alarm_control_panel.alarmo
          mode: away
          skip_delay: false


  # Arm Home at night
  - alias: "Alarm - Night Arm"
    trigger:
      - platform: time
        at: "23:00:00"
    condition:
      - condition: state
        entity_id: group.family
        state: "home"
      - condition: state
        entity_id: alarm_control_panel.alarmo
        state: "disarmed"
    action:
      - service: alarmo.arm
        data:
          entity_id: alarm_control_panel.alarmo
          mode: night


  # Disarm in the morning
  - alias: "Alarm - Morning Disarm"
    trigger:
      - platform: time
        at: "06:30:00"
    condition:
      - condition: state
        entity_id: alarm_control_panel.alarmo
        state: "armed_night"
    action:
      - service: alarmo.disarm
        data:
          entity_id: alarm_control_panel.alarmo


  # ===== TRIGGERED RESPONSE =====


  # Turn on all lights
  - alias: "Alarm - Triggered Lights"
    trigger:
      - platform: state
        entity_id: alarm_control_panel.alarmo
        to: "triggered"
    action:
      - service: light.turn_on
        entity_id: all
        data:
          brightness_pct: 100
      - service: switch.turn_on
        entity_id: switch.outdoor_lights


  # Push notification with actionable buttons
  - alias: "Alarm - Triggered Notification"
    trigger:
      - platform: state
        entity_id: alarm_control_panel.alarmo
        to: "triggered"
    action:
      - service: notify.mobile_app_phone
        data:
          title: "🚨 ALARM TRIGGERED!"
          message: >
            Sensor: {{ state_attr('alarm_control_panel.alarmo', 'open_sensors') }}
            Time: {{ now().strftime('%H:%M') }}
          data:
            actions:
              - action: "DISARM_ALARM"
                title: "Disarm"
              - action: "CALL_POLICE"
                title: "Call 911"
            push:
              sound:
                name: "alarm.caf"
                critical: 1
                volume: 1.0


  # Handle notification actions
  - alias: "Alarm - Handle Disarm Action"
    trigger:
      - platform: event
        event_type: mobile_app_notification_action
        event_data:
          action: "DISARM_ALARM"
    action:
      - service: alarmo.disarm
        data:
          entity_id: alarm_control_panel.alarmo
          code: !secret alarm_code


  # ===== PRESENCE DETECTION =====


  # Smart disarm on arrival
  - alias: "Alarm - Smart Disarm"
    trigger:
      - platform: state
        entity_id:
          - person.mom
          - person.dad
        to: "home"
    condition:
      - condition: or
        conditions:
          - condition: state
            entity_id: alarm_control_panel.alarmo
            state: "armed_away"
          - condition: state
            entity_id: alarm_control_panel.alarmo
            state: "armed_home"
    action:
      - service: alarmo.disarm
        data:
          entity_id: alarm_control_panel.alarmo

📋 Sensor Types Guide

Section titled “📋 Sensor Types Guide”

Which Sensors for Which Zones

Section titled “Which Sensors for Which Zones”
Sensor TypeEntry ZoneInteriorPerimeter24/7
Front Door✅
Back Door✅
Windows✅
Living Room Motion✅
Hallway Motion✅
Glass Break✅
Smoke Detector✅
CO Detector✅
Water Leak✅

Delay Recommendations

Section titled “Delay Recommendations”
# Entry Zone (front door, back door)
entry_delay: 30  # seconds to disarm
exit_delay: 60   # seconds to leave


# Interior (motion)
entry_delay: 0   # triggers immediately
exit_delay: 60   # ignored during exit


# Perimeter (windows, glass break)
entry_delay: 0   # triggers immediately
exit_delay: 0    # triggers immediately


# 24/7 (smoke, CO, water)
always_on: true  # active regardless of arm status

🛒 Buying Strategy

Section titled “🛒 Buying Strategy”

Budget DIY (~$150)

Section titled “Budget DIY (~$150)”
  • Zigbee door/window sensors (5x) (~$75)
  • Zigbee motion sensor (2x) (~$40)
  • Alarmo (free)
  • Smart speaker as siren (~$30)
  • Total: ~$145

Standard Konnected (~$350)

Section titled “Standard Konnected (~$350)”
  • Konnected Alarm Panel (~$189)
  • Reuse existing wired sensors
  • Alarmo (free)
  • 12V siren (~$25)
  • Total: ~$215-350

Commercial + HA (~$500)

Section titled “Commercial + HA (~$500)”
  • SimpliSafe starter kit (~$350)
  • Extra sensors (~$100)
  • Native HA integration
  • Total: ~$450-550

❓ Frequently Asked Questions

Section titled “❓ Frequently Asked Questions”

Ofte stillede spørgsmål

What is the best alarm for Home Assistant?
For full local control: Konnected Alarm Panel Pro + Alarmo. For easy setup: SimpliSafe with native integration. For smart home compatibility: Abode with HomeKit/Zigbee/Z-Wave support.
Can I build an alarm with just Zigbee sensors?
Yes! Use Alarmo from HACS. It works with any sensors in Home Assistant - Zigbee, Z-Wave, WiFi, ESPHome, you name it. No extra hardware required beyond sensors and a Zigbee coordinator.
Do I need professional monitoring?
No, not necessarily. With Home Assistant you can get push notifications, sirens, and even automatic camera recording. However, professional monitoring can provide extra peace of mind and connection to monitoring centers.
Does Konnected work with my old alarm system?
Yes! Konnected is designed to reuse wired sensors from older alarm systems. You replace the old panel with Konnected and keep all your existing sensors.
How do I get a siren to work?
With Konnected: Connect a 12V siren to the alarm output. With Alarmo: Use a smart speaker as siren via media_player, or a Zigbee/WiFi siren as a switch. Set up automation to activate on 'triggered' state.

📚 Next Steps

Section titled “📚 Next Steps”

Presence Detection

Presence detection for automation.

See guide →

Last updated: December 2025

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