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Reader Commands
6. Reader Commands
ASCII protocol is used for communication between an HPR Lite reader and a PC.
(American Standard Code for Information Interchange) is a character-encoding scheme based on
the ordering of the English alphabet. This is the simplest communications protocol. It transmits
only ASCII characters and uses ASCII control codes. It implies little or no error checking.
The HPR Lite commands are made up of three or more characters followed by a carriage return
(Enter key). Generally, the first three letters designate the command and the remaining
letters/digits designate the command's parameter. The commands are not case sensitive. Space
needs to be inserted between the command and its parameter. The backspace key can be used
to correct an improper command. The responses to the commands confirming the requested
action or setting parameter change are sent back by the reader.
The following is a list of the available commands.
6.1 General Commands
Command
RFV
RHV
RID
RUT
RDS <mm/dd/yyyy>
RTS <hh:mm:ss>
RDT
RDP
?
HPR Lite Reader User Manual
Description
Report Firmware Version
Report Hardware Version
Report Reader ID
Report Unit Type
Set Reader Date (mm/dd/yyyy)
"." can be used as a separator
Set Reader Time (hh:mm:ss, 24-hour)
"." can be used as a separator
Report Reader Date (mm/dd/yyyy) and
Time (hh:mm:ss, 24-hour)
Reset to Factory Default Parameters
List All Commands
Example Result
1.07.00
A2
01
HPR-Lite
Date changed
Time changed
<10/13/2012> <07:58:00>
Are you sure? y/n
Default settings loaded
ASCII
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