Datalogic Gryphon I GM440 Series, Product Reference Manual

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Product Reference Guide 299
Chapter 5
Message Formatting
Message Formatting
A message from the Host to the base must follow these rules:
• If Address stamping options or address delimiter are enabled on the
base, the Host replay must have address field and delimiter too. Other-
wise the message will be ignored. Address delimiter is present only
when address stamping is enabled.
• Address stamping is necessary to correctly route the message to the
Gryphon I, especially when more than one handheld is linked to the
same base. Address stamping could be disabled if the system is in
point to point configuration. If address stamping is not enabled, the
messages are addressed to the first handheld linked to the base.
• The maximum character length for messages is 48.
• Messages end with “CR” 0x0D ASCII character. The CR character cannot
be contained in the middle.
• Messages cannot start with '$' or # because these are reserved for Ser-
vice mode command
• Base station can receive host message only if Host Commands Obey/
Ignore is set to Ignore.
• Message could be sent to the HH in response to a Label when “Transmit
mode” require Ack from Host (see transmit mode parameter) or at any
time. When messages are sent not in response to a label must start with
DC2 0x12 ASCII character and could be sent in any transmit mode set-
ting.
• Message could be sent to all HH linked to base by using a Multicast
message:

“00 00 00 00 2A AA”
• In order to receive a message, handhelds must not be in sleep state.
The format of the ACK from Host message (used for transmission mode 02)
is:
[Scanner_Addr] [Scanner_Addr_delimiter] MESSAGE <CR>
The format of a generic message From Host to HH is:
[Scanner_Addr] [Scanner_Addr_delimiter] DC2 MESSAGE <CR>
where DC2 is ASCII 0x12 (^R) character.
[Items in square brackets are optional.]
• 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
Message Formatting is only available for the Gryphon™ Wireless
model.