The Adafruit PN532 NFC/RFID Controller Shield for Arduino is perfect for a project we want to build. However 4inches of reading is too small. We were hoping for 10in or maybe a little less? Is there anyway to increase the range?
THanks, hopefully this is posted in the right place
RFID
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6 posts • Page 1 of 1
Re: RFID
by tcooper » Wed May 09, 2012 10:08 am
The Adafruit shield was designed by RF engineers using the best test equipment to create a layout and antenna with 10cm (4 inch) range, the maximum range possible using the 13.56MHz technology. Simply put, 4 inches is the max.
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Re: RFID
by brian.campbell » Sat May 12, 2012 8:17 pm
I need to use my own analogue circuit and antenna. I understand that this was possible on the CL RC632 via MFIN and MFOUT. Is it possible with the PN532 (SIGIN and SIGOUT?) and if so, are these pins accessible?
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Re: RFID
by scott-42 » Sun May 13, 2012 12:36 am
mmoses wrote:The Adafruit PN532 NFC/RFID Controller Shield for Arduino is perfect for a project we want to build. However 4inches of reading is too small. We were hoping for 10in or maybe a little less? Is there anyway to increase the range?
Not with that board but you could couple that chip with an external antenna set for TX/RX to increase the range pretty far. The cost of using an external antenna is probably way more than you want to spend and there are lots of other issues you would need to deal with about power output and sensitivity. It is not impossible, just impractical.
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Re: RFID
by scott-42 » Sun May 13, 2012 12:58 am
brian.campbell wrote:I need to use my own analogue circuit and antenna. I understand that this was possible on the CL RC632 via MFIN and MFOUT. Is it possible with the PN532 (SIGIN and SIGOUT?) and if so, are these pins accessible?
I don't think you can like the RC632. The SIGIN and SIGOUT pins are for a companion chip (i.e. P5CN072) that does some security functions.
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Re: RFID
by brian.campbell » Sun May 13, 2012 3:01 am
scott-42 wrote:I don't think you can like the RC632. The SIGIN and SIGOUT pins are for a companion chip (i.e. P5CN072) that does some security functions.
I had a sneaking suspicion that was the case. I couldn't find any detail about how those pins were used. It looks like I'll have to make muy own board.
Thanks for the help anyway.
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