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NFC(Near-Field Communication) has been around for a long time and I have not given its application to the smart home much thought until I came across the Handy Home Assistant NFC Automations video post by MarkWattTech some months back. To summarise, you have the ability to scan these NFC tags and integrate them with Home Assistant to create different automations around the house of office.
What Type of Automations?
Yes, this may seem like we are reinventing the wheel as the Home Assistant Application itself or smart switches and PIR sensors around the house can also perform the same function but in all honesty, I have just found it so convenient for a lot of the smaller mundane automations around the house.
Is it secure?
The NFC tag itself does not store any sensitive information so placing them around the home to create simple automations does not pose any risk of making your Home Assistance instance vulnerable. For example, if you had to place a tag at the entrance of your family room to start a music playlist it would only be possible to do so with an approved phone which is registered to your Home Assistant instance. Your Apple or Android phones also need to be unlocked first to scan the tags which adds another layer of security. There is still a risk of someone potentially trying to re-write one of your tags to create other actions outside of Home Assistant but hopefully we can rely on our guests not to do so. For this there may also be the option of overcoming by write protecting the tags. I have not researched on that front but perhaps this can be a future update to this post to confirm. So, with this all said let us get started with the extensive list of hardware requirements you will need for this project…
You will need this
Then Program the NFC Tag
For my automation example with the scanned Tag I will be using it to toggle a LED light