Extend range of rc522 RFID reader on Raspberry Pi to 0.5m
<p>I'm trying to find a cheap way to get a RFID reading at about 0.3m-0.5m. I currently have a Raspberry Pi 3, and a rc522 RFID reader (code in python). </p>

<p>I can't seem to get a consistent estimate of the max range of this unit. I've heard that you can change it's config or increase the power to get better range, but no proof or clear instructions on whether that will actually work.</p>

<p>I also thought I could possibly build a bigger antenna, but also can't find instructions for that or ranges that will get me (if possible, please send instructions). </p>

<p>I've read that UHF readers will get me there, but their super expensive, and way overkill for my project (unless I can cheaply build my own UHF reader).</p>

<p>Has anyone had the same problem, and found a solution. Not sure if this is the right place to post this. I've not, sugesstions are welcome.</p>