Command and message frames
2.10 "ANW-MELD" message
ASCII protocol for RF200
20 Operating Manual, 11/2016, C79000-G8976-C329-04
reserved
--
Byte 7 0x30
Presence status
0x30 ≙ no transponder in the an-
tenna field
0x31 ≙ one transponder in the
Byte 9 0x30 / 0x31
With the active presence check, if there is a change in the presence status, the reader sends
a frame with the number of transponders in the antenna field. If a transponder leaves the
field at the same time as another transponder enters the field, two "ANW-MELD" messages
are sent.
Note
Reachability of the host
The presence message is asynchronous (i.e. without a request from the host).
This means that the host must always be ready to receive and must make suitable buffers
available so that the message ca
n be processed immediately.
To Next Page
Loading...
