How to Use NFC Tags With Home Assistant to Trigger Scenes With a Single Tap

Stick a small sticker by the door, tap your phone against it on the way out, and watch the lights dim and the alarm arm in one motion. That is the appeal of NFC tags with Home Assistant: a physical, tap-to-run shortcut for any scene or automation, built on cheap stickers and the official mobile app. No voice command, no fumbling through menus, just a tap.

Quick Answer

Use the Home Assistant Tags integration: write an NFC sticker from the companion app, then build an automation with a Tag trigger that fires your scene when the tag is scanned. Tapping the sticker can dim lights, arm the alarm, or run any scene. NTAG213 stickers cost under R10 each, so a tap-to-run control for every room is genuinely cheap.

How NFC tagging works in Home Assistant

When you scan an NFC tag, the Home Assistant companion app fires a "tag scanned" event carrying that tag's unique identifier. Home Assistant listens for that event and runs whatever automation you have linked to it. The official mobile apps work with NFC tags out of the box, so you do not need any extra hardware beyond the stickers and an NFC-capable phone, which most modern phones are.

The whole system rests on one idea: each tag has a unique ID, and you point an automation at that ID. Tap the tag, the ID fires, the automation runs.

Step 1: Write the NFC tag

Start by encoding a sticker so Home Assistant recognises it.

1. Open the tag dashboard in the Home Assistant companion app, where you can write directly to a blank NFC tag.
2. Hold the sticker to the back of your phone (near the camera on most handsets, where the NFC antenna sits) and write the tag from the app.
3. Give the tag a friendly name in the Tag panel so you can identify it later, for example "Front Door" or "Bedside".

NTAG213 stickers are a common, inexpensive choice that work well for this, and at under R10 each you can comfortably tag every room and entry point.

Step 2: Create the automation

With the tag written, link it to an action.

1. In Home Assistant, create a new automation and set the trigger type to Tag.
2. Choose the specific tag you just wrote from the list, so this automation responds only to that sticker.
3. Under actions, add the scene or service calls you want: activate a lighting scene, arm the alarm, adjust a thermostat, or any combination.
4. Save it, then tap the tag to test. The scene should fire instantly.

Stacking multiple actions

A single tap can do a lot. Because the automation's action block accepts multiple steps, one tag at the front door can dim the lights, arm the alarm, and lock a smart lock all at once, your whole "leaving home" routine in a single tap. That is where NFC tags become genuinely useful rather than a novelty.

Step 3: Place tags where they earn their tap

The best results come from putting tags where a tap is the most natural action. A "goodnight" tag on the bedside table that turns off the house and arms the alarm. A "leaving" tag by the front door. A "movie" tag on the coffee table that dims the lounge and switches the TV input. Think about the moments where reaching for your phone and tapping is genuinely faster than the alternative, and tag those.

You manage all of them from the Tag panel in Home Assistant, where scanned tags are collected so you can name, automate, or delete them as your setup evolves. The NFC stickers and the broader smart home gear to act on these scenes sit in the smart home range at Evetech, with the everyday extras among the accessories best sellers.

Frequently Asked Questions

Do I need special hardware to use NFC tags with Home Assistant?

No, just NFC stickers and an NFC-capable phone, which most modern phones are. The Home Assistant companion app reads and writes the tags out of the box, so there is no separate reader or hub to buy beyond the cheap stickers themselves.

How do I write an NFC tag for Home Assistant?

Open the tag dashboard in the companion app, hold a blank sticker to the back of your phone, and write the tag from the app. Then give it a friendly name in the Tag panel so you can link an automation to it easily.

What can a single NFC tap do?

As much as you put in the automation. One tap can run a full routine: dimming lights, arming the alarm, locking doors, and adjusting the thermostat together. Because the action block accepts multiple steps, a single tag can trigger an entire scene at once.

Are NFC tags expensive?

No. NTAG213 stickers cost under R10 each, which makes it affordable to place a tag in every room and at every entry point. The low cost is a big part of why tap-to-run scene control is so practical.

Where should I place NFC tags?

Wherever a tap is the most natural action: a goodnight tag on the bedside table, a leaving tag by the front door, a movie tag on the coffee table. Pick the moments where tapping your phone is genuinely faster than reaching for an app or speaking a command.