With a real PN532 from DT (not a knockoff) I get a range of about 1cm from the board with a xNT.
it is possible to improve the antenna for greater reading distance, or that could be improved in the PN532 for a longer reading distance
The FlexNT has better range than the xNT because itās bigger and has a bigger antenna as compared to the tiny glass tube. Itās purely physics. The smaller it is, the worse the range, the bigger it is, the better the range. Thatās not the only variable though. Design of the reader antenna does play a role.
In practice, more than a 1-1.5 cm with an xNT has been a challenge.
I hate to be the guy to revive a dead thread, but I purchased the exact model off amazon that @turbo2ltr did (I saw his review when I went back about a week later)
The DT version of the PN532 board is sold out, does anyone have an alternate source to buy a reliable antenna, or should I just get that bulky Adafruit breakout board? Iād prefer not to if I can, as Iām using an arduino nano for this project and trying to keep it small.
EDIT: Saw an electohouse logo on the homepage bannerās PN532. The website has the V3ās sold out, but they have a PN532 V4 for sale, that might be what Iām looking for?
I see no reason that one wouldnāt work. I would assume youād get legit product buying from them. The chip at least looks real.
Itās funny they misspelled āantennaā on the silkscreen.
1 Like
Yeah, I figured itād be fine too. Iāll order em, and update the thread with results, for anyone else wondering.
1 Like
Hey look into the .h file in the library theres a command to set the ex gain to max that REALLY helps. If I find it Iāll pop the code up
1 Like
I found the .h file at
%USERPROFILE% \Documents\Arduino\Libraries\Adafruit_PN532\Adafruit_PN532.h
Donāt know a hell of a lot about software though, but Iāll looking over it to see what I can see.
There is a line that is some thing like RX_Gain_max that line copy and paste into the init