User's Manual

HF Mifare Easy Module V1.0
ACG Identification Technologies GmbH 43
7.4.3.7.1 Multi tag list
Sending a <CR> as first parameter the reader returns a list of all present tags in the
antenna field. In the end the amount of detected tags are returned.
7.4.3.7.2 Reading distance
Each card needs a specific amount of power. The reader always provides the same
power. Therefore the reading distance will decrease if more tags are present.
Basically, the reading distance depends on the used tag, antenna and its tuning.
7.4.3.7.3 Multi tag select
Using the serial number with <CR> as parameter the according tag will be selected.
High-level interactions can be performed addressing only this card. All other tags
remain silent.
7.4.3.7.4 Multi tag reset
The antenna field reset can be deactivated with Protocol configuration 2 register.
By suppressing the antenna field reset it is possible to detect only new tags in the
antenna field.
7.4.3.7.5 Maximum number of tags
The maximum number of tags in the antenna field is limited to the physical
characteristics of the antenna.
The implementation detects up to 16 tags.