Build Whole-Home Presence Detection with eMotion Sensors

eMotion Air smart scene for whole-home presence automation

Whole-home presence detection gives a smart home a clearer understanding of room context. Instead of treating every room as empty or occupied based on one global timer, a room-by-room sensor plan can help Home Assistant respond to where people actually are.

This guide explains how to build that plan with eMotion Air, eMotion Pro and eMotion Ultra. It also shows where Home Assistant, an OpenClaw environment and an AI agent fit around the sensing layer. The goal is practical architecture: reliable room context first, then automations and AI-assisted interactions that respect the capabilities of the devices and integrations you have configured.

Why Whole-Home Presence Detection Needs a System View

A single motion event is useful, but it is not the same as knowing that a room remains occupied. People can sit still, read, work, watch television or sleep while a basic motion sensor sees no new movement. A whole-home plan treats presence as room context that can be shared with the automation system.

That does not mean every room needs the same sensor or that every routine should be fully automatic. A better approach is to map each room's purpose, choose an appropriate sensing path and let Home Assistant combine presence with time, temperature, light level and user-defined conditions.

What Each eMotion Sensor Contributes

The eMotion family covers different installation and room-control priorities:

  • eMotion Air: a battery-powered 24GHz mmWave presence multi-sensor with light, temperature, humidity and smart-button context. It lists Bluetooth and Zigbee connection options and is useful when you want flexible placement without running a cable.
  • eMotion Pro: a 24GHz presence multi-sensor that combines WiFi, MQTT, light sensing and built-in IR control. It is a practical fit for rooms where presence should also trigger compatible TV, AC, fan or media actions.
  • eMotion Ultra: a 60GHz presence sensor aimed at rooms that need a more advanced presence and environmental sensing path. Its current product information describes zone-oriented capabilities, temperature and humidity sensing, IR control and MQTT support.

Room co-location note: eMotion Pro and eMotion Air are not recommended in the same room. Air can be used with Air, and Ultra can be used with Air; when sensors share a space, plan their direction, distance, and any obstructions carefully.

eMotion Pro presence sensor for room automation planning

These descriptions are planning guidance, not a promise that every feature works in every connection mode. Check the current product page, firmware and integration requirements before building a final system.

Plan Presence Zones Room by Room

Start with the rooms where presence changes the outcome of an automation. A bedroom may need quiet presence detection for lighting and climate. An office may need a reliable occupied state while someone is seated. A media room may combine presence with IR control. Entryways and corridors may benefit from faster presence transitions and simpler scenes.

Give each sensor a clear responsibility in Home Assistant. For example, an Air sensor can provide flexible room context, a Pro can combine room presence with IR actions, and an Ultra can be evaluated for a larger or more demanding room. Avoid placing multiple sensors in one space until you know which states each sensor should own.

60GHz mmWave sensor placement for whole-home presence detection

Connect the Sensing Layer to Home Assistant

Home Assistant is the automation layer that turns sensor context into scenes, scripts and rules. The connection path depends on the eMotion model and the integration you choose. eMotion Air lists Bluetooth and Zigbee, while eMotion Pro and eMotion Ultra list WiFi and MQTT support. Treat those as separate setup decisions rather than assuming that one configuration path applies to the whole family.

Home Assistant room scene workflow using presence and climate context

Once a sensor is available as a Home Assistant entity, use meaningful names such as Bedroom Presence or Office Occupied. Keep the entity naming and room assignments consistent so that later automations, dashboards and AI-assisted explanations have an understandable context. For a more detailed gateway architecture, see the Home Assistant AI Gateway Setup Guide.

Practical Whole-Home Presence Automations

Lighting that follows the room state

Use presence as one condition for a room scene, then add time and light-level rules. A hallway scene may use a shorter transition, while a bedroom scene may keep lights low after a chosen hour. The sensor supplies context; Home Assistant decides how the scene behaves.

Climate and comfort routines

A room can use presence together with temperature or humidity to decide when a comfort routine should be considered. This avoids treating an empty room the same as an occupied room, while still leaving the final thresholds and safeguards visible in Home Assistant.

Media and appliance control

In a media room, eMotion Pro or eMotion Ultra may be evaluated when presence and IR control belong in the same room plan. Keep the automation reviewable: presence can enable a scene, while Home Assistant retains the actual device conditions and actions.

For a deeper example of presence, climate and IR actions, read the Home Assistant AI Agent Room Scene Guide.

Where OpenClaw and an AI Agent Fit

OpenClaw and an AI agent belong around the interaction and workflow layer, not inside the sensor itself. A presence sensor supplies room context; Home Assistant exposes entities and executes configured automations; an AI agent may help interpret a request, summarize context or propose a supported workflow.

This separation matters. An AI agent should not be treated as a replacement for a presence sensor, a Home Assistant integration or a deterministic safety rule. For example, a user might ask which rooms are currently occupied or request a proposed evening scene. The system still needs correctly configured sensors, entities, permissions and automations before that request can produce a useful result.

A gateway such as HomeClaw can be evaluated when you want to explore an AI-oriented smart home architecture around Home Assistant and OpenClaw. For an always-available Home Assistant control surface, see iSG Display Max. These products serve different roles from the eMotion sensing layer.

Choose Air, Pro or Ultra for the Right Room

Use a simple decision sequence:

  1. Need flexible, battery-powered placement? Start by evaluating eMotion Air.
  2. Need presence plus built-in IR control? Evaluate eMotion Pro for the room and appliances involved.
  3. Need an advanced 60GHz sensing path or zone-oriented planning? Compare eMotion Ultra against the room layout and current integration requirements.

For a broader comparison before buying, use the Best mmWave Sensors for Home Assistant guide. The right choice depends on room geometry, mounting, power, protocols, appliance control and the Home Assistant workflow you want to maintain.

Build in Stages and Keep the System Reviewable

Do not instrument the entire home at once unless you already have a clear entity and automation plan. Start with one high-value room, confirm the sensor state in Home Assistant, test transitions between occupied and vacant, and then document what the automation should do. Repeat that process room by room.

Keep a fallback for essential functions: a physical switch, an ordinary Home Assistant rule or a dashboard that does not depend on an AI interpretation. When the sensing layer, automation layer and AI layer each have a visible responsibility, the whole-home system is easier to troubleshoot, adjust and expand.

Frequently Asked Questions

What is whole-home presence detection?

Whole-home presence detection uses room-level sensors to provide Home Assistant with context about where people are present. That context can drive lighting, climate, media and energy routines across several rooms instead of relying on one motion sensor or one timer.

Which eMotion sensor should I use for a whole-home setup?

Choose eMotion Air when battery-powered placement and flexible installation matter, eMotion Pro when a room also needs IR control and WiFi/MQTT workflows, and eMotion Ultra when a room calls for a higher-end 60GHz presence and environmental sensing path. Confirm the current product specifications before purchasing.

Can eMotion sensors work with Home Assistant?

The eMotion product line is positioned for Home Assistant workflows through supported connection paths. eMotion Air lists Bluetooth and Zigbee, while eMotion Pro and eMotion Ultra list WiFi and MQTT support. The exact setup depends on the device, firmware, network and Home Assistant integration used.

Is eMotion Air suitable for rooms without wiring?

Yes. eMotion Air is battery-powered and designed for flexible placement, making it useful for testing presence automation in bedrooms, offices, rental rooms and other spaces where running a cable is inconvenient.

How is eMotion Pro different from eMotion Air?

eMotion Pro combines 24GHz presence sensing with WiFi, MQTT and built-in IR control for rooms that need both context and appliance actions. eMotion Air focuses on battery-powered placement and multi-sensor room context, with Bluetooth and Zigbee connection options.

Where does eMotion Ultra fit in a whole-home plan?

eMotion Ultra is the option to evaluate for rooms that need 60GHz presence sensing, richer room context or advanced zone-oriented planning. Use the current product information to confirm the exact capabilities and connection path for your installation.

Conclusion

Whole-home presence detection is best understood as a layered design problem. eMotion Air, eMotion Pro and eMotion Ultra offer different ways to add room context; Home Assistant remains the place where entities and automations are organized; OpenClaw and an AI agent can sit above that foundation to support interpretation and higher-level workflows when configured and supported.

Start with the rooms that benefit most, choose the sensing and connection path deliberately, and keep every important automation visible and editable. That approach creates a practical path from one responsive room to a whole-home presence system.

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