Datasheet

Sometimes it is useful to work with all cards in the field. For this purpose an optional
parameter “CYC” exists. When using the “CYC” parameter it is necessary to run an
inventory (INV) before. After that, all transponders in the inventory list will be selected
cyclically by sending SEL ATS CYC for each transponder.
Instruction:
SEL<SPACE>ATS<SPACE>CYC<CR>
Response, if successful:
[ATQA]<CR> see Appendix for the ATQA codes of different chip versions
[SAK]<CR> see Appendix for the SAK codes of different chip versions
[UID]<CR>
Examples:
Select a transponder currently in read range
SEL<SPACE>ATS<CR>
Select two transponders cyclically
INV<CR>
runs inventory round, e.g. with two transponders/UIDs in the field:
UID 1.: AC410094
UID 2.: C2DF6084
The select the first transponder (UID AC410094):
SEL<SPACE>ATS<SPACE>CYK<CR
Response:
0400<CR>
08<CR>
AC410094<CR>
The select the second transponder (UID C2DF6084):
SEL<SPACE>ATS<SPACE>CYK<CR
Response:
0400<CR>
08<CR>
metraTec MiFare Protocol Guide Page 17 of 38