Smart alarm and emergency scenarios: how the home protects itself

A leak sensor on its own only beeps. The real value appears when separate devices work as one connected system: a signal triggers an action, you learn about it immediately, and the logic executes locally — even if the internet is down.

Security is a system, not separate devices

HoumeOS brings sensors, cameras, locks and alarm states into a single logic. One and the same scenario can switch on the lighting, send a notification and close off access — without every device living in its own private app.

What we watch

• Water leaks — sensors under the washing machine, dishwasher, water heater and under-counter appliances; on a signal, solenoid valves cut the supply.
• Gas (methane, LPG) and carbon monoxide — alarm, boiler shutoff, ventilation prompt and a notification.
• Smoke and fire — early warning and a prompt showing the evacuation route.
• Open doors and windows — the state of each zone, especially with the alarm armed.
• Motion and foreign presence — indoor and outdoor zones with different rules.

What happens when an alarm fires

An alarm is not just a sound. On an event the system runs actions you defined in advance:

• it turns on lighting along the path and in the suspicious zone;
• it sends a notification to the dashboards and the phone;
• it secures unprotected access and starts recording video;
• on a hazard (water or gas) it shuts off the source before the damage grows.

Access control: roles and PINs

Not everyone needs full rights, so access is split into levels:

• Administrator — full rights and configuration;
• Household — daily control, modes and scenarios;
• Guest — lighting and scenarios only, with doors, garage and alarm out of reach.

Every code has a name and an expiry. You see who entered, when and through which door — without ever handing over the master key. The details of how PINs are stored and audited are in Access security: roles, double confirmation, PIN hashing and audit.

Why local matters in emergency scenarios

If the logic lives in a cloud, a dropped connection means a blind, helpless system exactly when you need it most. With local automation, the alarm, the emergency actions and access control keep working without internet; remote notification is an extra, not a condition.

What to expect

The specific sensors and valves depend on the property, but the principle is the same: fewer false alarms, faster real reactions and a complete history of events. That is why we draw the security scheme after a site survey, never in advance.