User's Manual Part 1

13,56 MHz Multitag Reader Module, Version 0.9v
ACG Identification Technologies AT Page 28
5.3.8 Multi Tag Selection / List
This command detects several ISO15693 tags at the same time. It replaces the fast
select command in multiple tag surroundings. The Multi Tag list command lists all
tags with its serial numbers. Using the Multi Tag Select command to address a single
or a group of tag together. Each tag has to be selected separately
5.3.8.1 Command
Command Data
‘m’ Serial number (8 bytes)
5.3.8.2 Answer
Answer Description
data ‘V’ + serial number (8 bytes)
‘N’ Error: No Tag in the field
5.3.8.3 Multi tag list
Sending a <CR> (0Dh) as first parameter the reader returns a list of all present tags
in the field. In the end the amount of detect tags are returned. A Multi Tag list
command resets all tags in the antenna field.
5.3.8.4 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.
5.3.8.5 Multi tag select
Using the eight-byte serial number as parameter the according tag will be selected.
High-level interactions can be performed addressing only this card. All other tags are
still present but not used.
5.3.8.6 Maximum number of tags
The maximum number of tags in the antenna field is limited to the physical
characteristics of the antenna. Internally the software can handle up to 40 tags
(theoretical maximum).
5.3.8.7 Example
Command Description
m<CR> VE000123456789012 –> first card
VE000112233445566 –> second card
02 –> number of detect tags
mE000123456789012 E000123456789012
Select card with its serial number