RFID / NFC Smart Ring - Size 11 - NTAG213 POL_Male-Female Wires with Pre-Crimped Terminals check out this link

check out this link

and 20 (I2C) can be used to read and write whatever digital signals you could want

To run through the Getting Started guide the kit also includes a MicroMod Update Tool

* Display Color: White

0 and later

RFID / NFC Smart Ring - Size 11 - NTAG213 POL_Male-Female Wires with Pre-Crimped Terminals check out this linkWhat did Lord Sauron, when forging the One Ring in the fires of Mount Doom forget to include in his all powerful ring? What did he forget to leave out of the ring impervious even to dragon fire, designed to rule over all free peoples of Middle Earth in perpetuity a ring destined to be the One Ring to Rule Them All, to tempt its wearer with the promise of infinite power? Thats easy it could have used an embedded RFID NFC transponder! NFC (near field