https://devzone.nordicsemi.com/f/nordic-q-a/1453/bluetooth-passive-chipDear Nordic Does Nordic have a passive writable chip available (with compat antenae) that can be activated by mobile device bluetooth scanning event. The mobile device only has to read the transmitted unique chip ID. As Im new at this a Starteren-USTelligent Community 13Mon, 27 Jan 2014 09:38:47 GMThttps://devzone.nordicsemi.com/thread/6500?ContentTypeID=1Mon, 27 Jan 2014 09:38:47 GMT137ad170-7792-4731-bb38-c0d22fbe4515:2bb1b5ae-fd48-4d57-9870-2f1f91b50ec5Ole Morten<p>We don&#39;t have any example board, chip or similar for an application like this.</p> <p>It may be possible to make something that&#39;s able to use a button press or similar to start advertising, be connected to and either receive a write or transmit the button press, but I can&#39;t quite imagine that it would be possible to harvest enough energy from the received packets themselves to reply. However, energy harvesting isn&#39;t something we have a lot of experience with, so I&#39;d love to be mistaken there. :)</p><div style="clear:both;"></div>