NFC Tags
Automate hub actions using NFC Tags
The dashboard supports scanning NFC tags to perform actions
For example,
scan a tag to enable/disable your home security
scan a tag to turn on/off lights
Getting Started
It's easy to get started.. here's what you'll need:
NFC Tags.. super cheap. I bought 20 for $10 - just search Amazon for "NFC tags". I'm still learning the various formats but you should be good with anything that says "NTAG 215" on it.
An NFC Tag writer app. NFC Tools is free
Which device to command?
The next step is figuring out which device to perform the action on. This can be any Hubitat device or even a virtual device tile such as an image tile.
What action to perform?
What you want to do when scanning a particular NFC tag? There's currently 2 options:
view the device; this behaves the same as if you were to click on a device/tile in the app. If it's an actionable device a prompt will be displayed (on/off) or if it's another type of device (ie: image) it'll open the tile full-screen
toggle the device state silently; this only works for devices that can be toggled (lights/switches/valves/locks); no UI is displayed - the device's state is toggled on the hub
Create the custom URL
When you know the device ID and action - creating the custom URL syntax is easy. The URL format is: "hd://<command>/<device id>"
<command> can be one of "view" or "toggle"
"view" will show you the device as thought you clicked on it in the app. If it's a device that can be toggled, you'll see an on/off prompt
"toggle" will silently toggle the state of the device - from on -> off - without prompting
<device id> is the hubitat hub's device ID of the device you want to control.
Example URL's:
Writing the NFC Tag
Open the NFC Tools app
Under the WRITE tab, click on "Add a record"
NOTE: If a record already exists from a previous tag you created, you can edit it instead or delete it
Click Custom URL / URI
Enter the URL you created in the above step. It MUST start with "hd://" to work
Click Write button
Place NFC tag up against the back of your phone (my S20 requires the tag to be in the middle of the device.. other devices might have the NFC reader in a different place)
Test the result
Once the NFC tag is written, you can close NFC Tools app. Now, anytime you place the NFC tag up against your device it should either send the command or open a prompt.
NOTE: NFC doesn't work when the device is locked. The Hubitat dashboard does NOT have to be running but the device does have to be unlocked first.
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