/challenges-projects/design-challenges/texas-instruments-safe-sound-wearables-design-challenge/b/blog/posts/safe-sound-wearables---trackable-safety-helmet-for-miners-9-access-control-with-nfcEdit: The draft has been published by mistake, therefore, I updated it. I don&#39;t know why but it takes so long to implement access control with NFC. I think I put forward it because it is a separate design from the helmet. Hence, I use a passive ...en-USTelligent Community 12https://community.element14.com/challenges-projects/design-challenges/texas-instruments-safe-sound-wearables-design-challenge/b/blog/posts/safe-sound-wearables---trackable-safety-helmet-for-miners-9-access-control-with-nfcTue, 23 May 2017 01:22:09 GMT93d5dcb4-84c2-446f-b2cb-99731719e767:8eaaffff-0b9d-4d02-b4d2-658e508d9449dougw1<p><span>[mention:9e1d9b462d2f4d20a720e58a9607b3ea:e9ed411860ed4f2ba0265705b8793d05]</span> The deadline is June 26.</p><img src="https://community.element14.com/aggbug?PostID=3049&AppID=150&AppType=Weblog&ContentType=0" width="1" height="1">