Datalogic Gryphon I GD4100, Reference Manual

Page: 381 / 428

Product Reference Guide 379
Chapter 14
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. Otherwise 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 dis-
abled 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.
• 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 Service 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 setting.
• 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.]
NOTE
Message Formatting is only available for the Gryphon™ Mobile
model.