Issue about reading and writing Monza 5 chips

Sensors NFC & RFID
1

Hello,

I’ve bought a Simultaneous RFID Tag Reader. I tested the arduino connection and successfully connected with RPI4, python interfacing. I’ve got results reading and writing multiple rfid tags with shield’s antenna.

Now, I’ve connected an external antenna (https://www.sparkfun.com/products/14131), everything work’s fine, reading and writing rfid tags like these https://www.sparkfun.com/products/14151 … 1619713288. I’ve obtained around 4 mts for reading and writing, using an external antenna as it is shown in the Youtube video.

Then, I tried the same thing but with monza 5 chip, encapsulated into a polymeric enclosure (like this, https://www.sparkfun.com/products/9417, but containing monza chip like this https://support.impinj.com/hc/en-us/art … -Datasheet). In this case, distance was reduced to no more than 20cm from external antenna, reading and writing.

So, should I have to change something to get more distance? I mean, I’ve been changing 5 dBm to 25dBm, and geographical region with no results. Is it a type of antenna issue? I mean, geometric internal design? If it is, can you recommend one to us?

Best regards!

Pablo

2

Even the one we offer https://www.sparkfun.com/products/9417 maxes out at 32cm, so it may be an inherent max of those style tags/enclosures (size, minimum distance for spacing the plastic, etc) - it might be a better idea to post this question in the Monza Site’s forums/support channel and seek confirmation/denial there, as it seems the SparkFun hardware is functional and we can’t support outside products

Best of luck!

3

Generally, the smaller your tag, the shorter the read range.

Check the video in the link below for some information about read rage. :slight_smile:

https://www.youtube.com/watch?v=rSbSYp2hexs