Does the NFC/RFID Controller Shield have anti-collision support?

[rocketblast]

Adafruit PN532 NFC/RFID Controller Shield for Arduino
http://www.adafruit.com/products/789

Does this shield have anti-collision support?

If not, is this a hardware or software limitation?

Thanks!

[adafruit]

The PN532 can read up to 2 cards at a time - check the PN532 documentation for any more details about anti-collision support - we've dont remember seeing anything about it & anything the PN532 supports, the shield supports (altho there may not be example code for it)

please post up what you find!

[rocketblast]

From skimming the manual it looks like some of the commands will return a specific error code when there is a collision. One then has the option to send a select command to pick the desired target and then re-run the command.

Section 7.3.5 shows the InListPassiveTarget command, which lists the available targets. You are correct that the 532 can only detect up to two targets.