Motion Sensor After Checkout

You’re standing in line at the grocery store on a Tuesday at 11:15 a.m. and your cleaner is texting you: “Are they out yet?” You have no idea. The guest hasn’t messaged. Their car was in the driveway when the cleaner drove past. So now your cleaner is killing 20 minutes at the gas station and you’re trying to decide whether to text the guest and feel pushy or wait and lose the cleaning slot.

A single motion sensor after checkout, wired into the right automation, ends this exact phone call. The sensor sits silently in the hallway. When motion stops for 45 minutes after the door has cycled, you and the cleaner both get a green-light text. The cleaner drives in. You go back to your cart. Done. This recipe is the minimum viable version of that setup — one sensor, one automation, one notification. For the broader sensor strategy, the airbnb turnover smart sensors overview shows how this single device fits the full reset.

When this is the right tool

If you have one to maybe four units, a smart lock, and a cleaner who actually responds to texts, this is for you. If you’re running 20 doors and a full PMS like Hospitable or OwnerRez, this same logic still applies, just go straight to the API integration instead of SMS. The principle is identical: stop guessing when guests have left, derive it from a quiet signal in the hallway.

This is also for hosts who want a single, defensible sensor — not a closet full of plugs and contacts. A motion sensor is the one device that catches the most failure modes: door left propped, guest who never locked behind them, late checkout where the lock log shows nothing useful. Hosts who want belt-and-suspenders coverage should pair this with a door sensor cleaner notification on the front entry.

What you need

• One indoor motion sensor. Aqara Motion Sensor P1 (Zigbee) is the workhorse pick — small, cheap, multi-year battery. Philips Hue Indoor Motion is more expensive but plays nicely if you’re already on a Hue Bridge. Avoid anything with a built-in camera or microphone.
• A hub. Samsung SmartThings Station, Hubitat Elevation, Aqara Hub M3, or Home Assistant Yellow. Whatever you have. If you don’t have one, SmartThings Station is the easy entry point.
• Your smart lock or door contact already reporting to that hub, so you can confirm the door has cycled. A Schlage Encode or Yale Assure 2 Wi-Fi lock is the usual pairing.
• A way to notify the cleaner. SMS via Twilio, a shared Slack channel, a Telegram bot, or your PMS’s native cleaner messaging. Pick whichever your cleaner already reads.

Where to mount the sensor

Placement is 80% of how well this works. The goal is one sensor that sees through-traffic between the rooms a guest can’t avoid using on their way out. In most layouts, that’s the hallway between the bedroom and the front door, or the kitchen-to-living-room corner. You want a high vantage point, 7-8 feet up, angled down across the hallway, not pointing at a window or a vent.

Things that mess up a motion sensor and that you should avoid: direct sunlight crossing the lens at any time of day, an HVAC register blowing warm or cold air across its field of view, a ceiling fan that throws shadows, and pets if they’re staying in the unit. If your listing is pet-friendly, this whole approach gets harder — you’ll need to add a door contact as the primary signal and demote motion to a secondary check.

Step-by-step setup

1. Pair the motion sensor to your hub. Name it something boring and obvious: “Hallway Motion.”
2. Set its cooldown / re-trigger delay to 1 minute. You want it to report fresh motion quickly, not sit on a 5-minute lockout.
3. Confirm your smart lock or door contact is also reporting to the same hub, with timestamps you can read.
4. Build the automation. Trigger: it’s between 10:00 a.m. and 1:00 p.m. on a checkout day (pull from your iCal feed if your hub supports calendars). Condition: the front door has cycled at least once today, AND the hallway motion sensor has reported “no motion” continuously for 45 minutes. Action: send a notification to the cleaner that says something like, “Unit 12 is vacant. You’re clear to go in.”
5. Build the fallback. Trigger: it’s 12:45 p.m. on a checkout day and the vacant signal has not fired. Action: alert you, not the cleaner. The full checkout sensor automation guide covers this fallback in detail.
6. Suppress the motion-based logic during occupied periods. The sensor still records motion, but the automation should not fire vacant alerts during a stay.
7. Wire the vacant flag to a downstream smart plug reset after guest leaves recipe so lamps, diffusers, and the kettle return to their post-stay state automatically.
8. Test it. Walk in, walk around for two minutes, walk out. Wait. The notification should land roughly 45 minutes after your last motion event.

What to tell guests

One sentence in your listing description and a matching line in your house rules: “This unit has a motion sensor in the hallway used to confirm the property is vacant after checkout. There are no cameras or microphones inside.” That’s all. Don’t bury it. Don’t dramatize it.

Hosts who calmly disclose almost never hear about it. Hosts who hide it and get caught get one-star reviews titled “hidden sensor.” Outdoor video stays on a Ring Video Doorbell or Wyze Cam OG facing the entry only — never anything indoors.

Common mistakes

• 45-minute window set to 15 minutes. Guests shower. Guests sit on the porch with coffee. Guests scroll their phone in the bedroom. Fifteen minutes of “no motion” doesn’t mean empty. Forty-five does.
• Skipping the door-cycled condition. If you only check motion, a guest who took a long nap looks identical to an empty unit. Always require that the door has cycled at least once that morning.
• Mounting at eye level. Eye-level sensors collect dust, attract guest curiosity, and have a worse field of view. Mount high.
• No fallback. If the vacant signal never fires, you need to know — not just the cleaner. Build the 12:45 self-alert.
• Ignoring battery alerts. A dead motion sensor reports “no motion” forever, which means the cleaner gets a vacant signal every checkout, even when the guest is still there. Subscribe to low-battery alerts and replace before the threshold.
• Skipping the cleaning-complete confirmation. The motion sensor tells you the unit is empty; a cleaning complete smart button tells you the cleaner is done. Use both, or you’ll still text the cleaner asking “is it ready?”

FAQ

Can a single motion sensor handle a whole short-term rental?

For most one- and two-bedroom units, yes — if it’s mounted in the right hallway and paired with a door cycle check. For larger homes (3+ bedrooms, multi-floor), you want a second motion sensor in a different traffic zone so a guest hiding out in a back bedroom doesn’t fool the system. The occupancy sensor for short-term rental logic gets more reliable as you add overlapping zones, but two well-placed sensors is usually plenty.

Will the sensor record video or audio?

Models like the Aqara Motion Sensor P1 and Philips Hue Indoor Motion sensors are passive infrared (PIR) only. They detect changes in heat patterns and report a binary signal: motion or no motion. There is no microphone. There is no camera. There is no recording. They cannot identify who is moving, only that something warm-bodied moved through the field of view.

What if the guest leaves at 6 a.m. before the automation window opens?

Most hosts cap the window at 10 a.m. on the early end to avoid waking up the cleaner with 6 a.m. alerts. If your cleaner is happy taking early jobs, drop the start to 7 a.m. The logic still holds: door cycled + 45 minutes of stillness = vacant. The window is just about when you want to be notified, not whether the detection works.

Does this work for back-to-back same-day turnovers?

Yes, and that’s where it earns its keep. A vacant signal at 9:50 a.m. instead of an assumed 11 a.m. departure gives the cleaner over an hour of buffer, which is often the difference between accepting and declining a same-day turn. Pair this with a smart-lock code rotation that fires on the same vacant flag, and the whole back-to-back becomes hands-off.

Related reading

• Airbnb occupancy sensor turnover — the multi-sensor stack that adds door contacts and smart plugs on top of this single motion sensor.
• Door sensor cleaner notification — the simplest companion: confirms the door has cycled before the motion timer starts running.
• Checkout sensor automation for Airbnb — the IF/THEN flow that turns a vacant signal into a cleaner SMS, lock-code rotation, and HVAC bump.
• Airbnb reset routine after cleaning — what fires after the cleaner finishes and leaves.
• Airbnb supply tracking automation — cross-cluster: pair vacancy detection with a consumables alert so the cleaner walks in knowing exactly what to restock.

Where to take this next

Once the motion-based vacancy signal is reliable, layer it into the rest of the turnover. Grab the smart turnover reset checklist when you’re ready to operationalize this across multiple units.