Product Reference Guide
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Appendix G
Handheld Data Format Requirements
This appendix provides application notes to describe the general format of data that can be
accepted by the scanner through the auxiliary port as transmitted from a handheld scanner.
Handheld Data Format Requirements General
• RS232 - 9600 bps, 8 data bits, 1 stop bit, no parity.
• RS-232 RTS is used to “bracket” the data received from the handheld: RTS must be
asserted high during data transmission, and de-asserted after label transmission is com
-
plete.
No other flow control mechanisms are required or supported.
There must be a delay of at least 2 bit cell times (approximately 208 microseconds)
following the transmission of the last character before de-assertion of the RTS signal.
The de-assertion of the RTS signal must happen in less than 50 milliseconds after the
last character is transmitted.
• USB handhelds enumerate as a CDC ACM serial device.
• USB devices should also bracket the data with the RTS equivalent.
• The time between character transmission can be no longer than 50 milliseconds.
• Symbologies requiring fixed lengths (UPC/EAN) will enforce length requirements for
validation of the label.
• Handheld will be required to transmit start and stop characters for Codabar and
Code39 labels.
• Appropriate industrial length requirements will be enforced (if configured) for valida-
tion of the label.
• Maximum label lengths will be enforced for label validation (i.e. labels longer than the
maximum label size will not be validated).
• Standard Datalogic formats generally use a single prefix character. see specific formats
section.
• Maximum label size allowed including identifiers is 2714 bytes
• Recommendations:
•Handheld should not be configured for audible label read indication.
•Handheld should not be configured for visual label read indication.
•Handheld should not be configured for continuous label read mode.
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