Forum › MIFARE and NFC Reader IC`s › Can´t get Anticollision loop with two PICCs. › Reply To: Can´t get Anticollision loop with two PICCs.
Hi Aitor,
Two annotations:
“Collision detected” is a necessary but not a sufficient condition for a collision. This means sometimes a collision is detected properly, but sometimes not. It is not the goal for an anti-collision to detect a collision, but rather to select a card in the field properly. If the card is selected by the reader, it can be deselected and the other card in the field can be selected.
The anti-collision needs the adherence of an exact bit pattern. If for instance the quality of the reader is very high and the slopes of the sending pulse is diffuse, then the answer varies (jitter!) in particular if different card types are used. This can make the collision appear on wrong positions.
The TapLinx team
Two annotations:
“Collision detected” is a necessary but not a sufficient condition for a collision. This means sometimes a collision is detected properly, but sometimes not. It is not the goal for an anti-collision to detect a collision, but rather to select a card in the field properly. If the card is selected by the reader, it can be deselected and the other card in the field can be selected.
The anti-collision needs the adherence of an exact bit pattern. If for instance the quality of the reader is very high and the slopes of the sending pulse is diffuse, then the answer varies (jitter!) in particular if different card types are used. This can make the collision appear on wrong positions.
The TapLinx team
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