Most of 43oh knows Fred as the guy who implanted an NFC chip in his hand. His main aim for the NFC implant was to use it for things like gaining access like a locked door, his Nexus 5 or his PC and and also to store information such as a VCard.
If you are curious, the xNT implant was the outcome of a KickStarter campaign in December 2013. The NFC is based on the popular NTAG216 chip which contains one of the larger memory chips offered by NXP.
Back in May of 2014, Fred had the NFC tag implanted “in the fleshy bit between my left thumb and forefinger”. His first test, with the bandage still on, was to test it on a Samsung SHS-2320 EZON door lock in his workshop. Everything went as planned.
I’m also glad to say it works really well unlocking both my Nexus 5 phone and the Samsung Ezon SHS-2320 lock on my workshop. I’ve currently got my contact vCard on it so can give my details to someone just by touching their (NFC enabled) phone against my hand. That would have been much more useful before I was married!
His next project was to unlock his PC using the implant. It had to be done with an MSP4305529 to utilize its USB capabilities. He used an MSP4305529 Launchpad along with a DLP NFC Transceiver BoosterPack. A U-FL to SMA antenna was added to give the reader a decent range. The embedded side was a little tricky as code was only available for the MSP430G2553. Porting over to the 5529 took some time, but it all worked out in the end.
On the PC side, a small executable talks to the Launchpad. The serial port is implemented over CDC or Communication Device Class. This is only used to set the password. The Launchpad also talks to the PC via HID, emulating a keyboard.
If the Launchpad sees Fred’s tag, it sends a CTRL+ALT+DEL(password)ENTER key string to the PC. If Fred is away from his PC for a certain amount of time, it sends a WIN+L key string to the PC to lock it.
All this fits into a nice 3d printed bright yellow case.