eMotion Air is a battery-powered mmWave presence multi-sensor for room-aware smart-home routines. The useful result is not only a presence reading; it is a predictable room state that Home Assistant and LinknLink App can use for lighting, climate, notifications or other supported actions.
This guide focuses on installation planning and automation validation. It does not assume a fixed battery life, a universal mounting position or a specific Home Assistant integration version. Always verify the device state and the available entities in your own setup.
What to Plan Before Installing eMotion Air
Choose the sensing zone
Decide which people, desk, bed, doorway or room area should count as occupied.
Keep placement repeatable
Record height, direction, nearby movement sources and the reason for the chosen location.
Connect the outcome
Route the tested presence state into a narrow, reviewable Home Assistant or LinknLink App automation.
A battery-powered presence sensor is easiest to tune when the room, sensing direction, power plan and automation outcome are decided together. Start with one room, record the placement, and test the Home Assistant state before expanding the setup.
Before You Start
- Confirm the Home Assistant integration path and the entity names that your account can see.
- Choose one room and write down the intended occupied and vacant behavior before mounting the sensor.
- Keep the device accessible while testing so the battery and placement can be checked without disturbing the room.
- Avoid placing the sensor where fans, moving curtains, reflective surfaces or adjacent rooms can create ambiguous readings.
- Prepare a reversible test automation, such as a notification or a low-impact light scene, before controlling climate or access devices.
Place, Pair, Tune and Test One Room at a Time
1. Define the room outcome
Write the result in plain language, such as occupied when someone is at the desk and vacant after the room is clear for a chosen delay.
2. Select a starting position
Place eMotion Air with a clear view of the intended sensing area and note the height, direction and nearby sources of movement.
3. Power and pair the device
Use the supported setup flow, confirm the device is online and check which presence or related entities are exposed to Home Assistant. eMotion Air can integrate with Home Assistant through Bluetooth integration or Zigbee/ZHA, depending on the available hardware.
4. Name the room entity
Use a clear room and role name so the state is easy to identify in Home Assistant, LinknLink App and future automation reviews.
5. Test occupied state
Enter the target zone, observe the entity state and record how quickly the room changes to occupied.
6. Test vacancy delay
Leave the zone, wait for the configured delay and confirm that the room does not become vacant too early.
7. Connect one automation
Start with a reversible notification or light action, verify the trigger and only then consider climate or multi-device scenes.
Example Prompts and What to Review
| Use case | Example request | Review before action |
|---|---|---|
| Desk presence | When office-desk-presence is occupied, prepare a light scene; show the target entity before enabling it. | Room, entity, scene and approval state |
| Vacancy delay | When bedroom-presence is clear for 10 minutes, prepare a reminder instead of switching off the climate immediately. | Delay, target room and action scope |
| Entryway routine | Use entryway-presence to suggest a hallway light action, but do not control locks or alarms. | Sensitive devices excluded |
| Battery check | Create a weekly reminder to review the eMotion Air battery state and device availability. | Device name, reminder date and destination |
| LinknLink App review | Show which room and presence entity this request will use before creating the scene. | Entity mapping and proposed actions |
Use Read, Prepare, Approve and Execute Stages
| Stage | Agent task | User control |
|---|---|---|
| Read | Inspect only the permitted source. | Choose the app, date range, room, folder or account. |
| Prepare | Extract entities and build a draft or proposed plan. | Check assumptions, missing information and affected resources. |
| Approve | Present the action and destination. | Confirm or revise before execution. |
| Execute | Run the supported action after approval. | Verify the result and keep a reversal path when possible. |
Review Checklist
- Does the selected zone match the room behavior you want to automate?
- Is the eMotion Air entity connected to the intended Home Assistant area?
- Does occupied state appear while a person is in the target zone?
- Does vacancy wait long enough to avoid switching a routine too early?
- Are climate, access and security actions separately reviewed before approval?
Privacy, Permissions and Safer Defaults
Cross-app tasks can touch personal communications, calendars, files, photos, locations and household devices. Grant the smallest useful permission, keep unrelated data out of scope and avoid sharing credentials, passwords, one-time codes or private account details.
Use drafts for messages and attachments. Use scene previews for smart-home changes. Keep purchases, access control, security devices and destructive file actions behind explicit human confirmation.
Troubleshooting
The room becomes vacant too soon
Increase the vacancy delay, review the sensing angle and test the zone while someone remains still in the room.
The sensor detects an adjacent room
Narrow the intended zone, reposition the device and check whether open doorways or reflective surfaces are affecting the state.
The entity is difficult to identify
Use a room-role naming pattern and update the Home Assistant area or display name after recording existing references.
The device goes offline
Check battery state, distance, network or integration status, and confirm the entity is available before changing automation logic.
A scene triggers more actions than expected
Reduce the first test to one reversible action and review every device target before enabling a multi-device scene.
Related LinknLink Products
- eMotion Air: a battery-powered mmWave presence sensor for room-aware automations.
- eMotion Pro: presence sensing and supported room automation signals.
- eMotion Ultra: 60GHz presence, climate context through its sensor cable, and built-in IR.
- HomeClaw: a local Home Assistant and AI gateway path.
- eRemote HA: local IR control for compatible appliances in Home Assistant.
Related LinknLink App and Home Assistant Guides
- eMotion Air vs Pro vs Ultra buying guide
- Home Assistant presence sensor calibration guide
- Home Assistant room occupancy helper guide
- Presence, temperature and IR automation guide
- LinknLink App Feature Guide
Frequently Asked Questions
What is eMotion Air used for in Home Assistant?
eMotion Air provides battery-powered mmWave presence sensing that can supply room context for supported Home Assistant automations.
Where should I place eMotion Air?
Start with a position that has a clear view of the intended room zone, then test occupied and vacant states while accounting for nearby movement sources and adjacent rooms.
Does eMotion Air need a fixed power cable?
eMotion Air is battery-powered. Check the current product instructions and your device state for battery setup and maintenance details.
How can I reduce false vacancy events?
Use a suitable sensing angle, define a clear zone, and add a vacancy delay that matches how people use the room.
Can eMotion Air trigger climate or IR actions?
It can provide presence context for supported Home Assistant or LinknLink App workflows. Review the target device, condition and action before enabling climate or IR control.
Start with One Room and One Automation
Choose one room, place eMotion Air where the intended zone is visible, test presence and vacancy states, then approve one reversible automation before building a larger routine.