User's Manual

Table Of Contents
Product Manual - RFID Reader UF70 Certum 121
Chapter 7
Operation
H – Heartbeat The H command can be used to query the serial number of the device.
The response code is not required for the individual device. This code is always
"0000".
Example:
>> H0
<< h012340000
Serial number: 1234
Host reader
CMD Reader ID
H1 byte
Reader host
CMD Reader ID Serial number Response code
h 1 byte 4 bytes 4 bytes