User manual

POWERSCAN
™
D8330/M8300
172
6.2 MESSAGES FROM HOST TO READER
The general format to enable the Scanner for a 2 way communication is:
[Scanner_Addr] [Scanner_Addr_delimiter]
MESSAGE
[CR]
NOTE:
 If you have enabled the Scanner Address Stamping or the Scanner Address
Delimiter, you must specify them in every message.
The format for other asynchronous messages is:
[Scanner_Addr] [Scanner_Addr_delimiter] [DC2]
MESSAGE
[CR]
where DC2 is ASCII 0x12 (^R) character.
 If you have not enabled the Scanner Address Stamping or the Scanner Address
Delimiter, you must not specify them. In this case all messages will be implicitly
addressed to the 'binded' Scanner of the cradle directly connected to the serial
line.
 The Scanner can only receive messages if two-way mode is enabled. (See section
5.9.4, “Transmission Mode”, the command is on page 159).
 Messages cannot start with '$+' because they would be interpreted as a
configuration command.
 You can send a message to the Scanner only while it is on. This happens when it
has sent a message to the host and the radio timeout has not yet expired. (See
section 5.9.1, "Radio Protocol Timeout"; command is on page 129).
 If you want to control the Scanner's beeper from the host, you will also probably
want to disable the good transmission beep that is emitted when the code is
received from the cradle. (See command on page 85).
The message field can store plain text and escape sequences.
 Escape sequences are interpreted as commands.
 Plain text is directly printed on the display. If writing beyond the end of line, the
display does not wrap automatically. Extra characters are ignored. Control
characters are not interpreted (i.e. LF, FF, etc.).