Hello, complete novice here. I am a custom home builder by trade. We leave our tools at the job sites from time to time. I am constantly finding that my power tools are being used while I am on other sites or on errands. I had a thought that since I have a nfc ring, maybe I could hook up a reader (internally) that would allow me to use my tools as long as the ring is present. I have dug through the internet & can find a way to trigger a switch on or off. But I believe the constant presence of the ring would cause problems. Is there a way to setup a pn532 v3 to switch a relay to on only while the ring is present?