Marson MT840, User Manual

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MT840 User’s Manual V1.1
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Once enabled, a checksum will be added to the end of each data to conduct Xor calculation. For
Bluetooth SPP & USB VCP, the BCC is 1 byte. For Bluetooth HID & USB HID the BCC are 2 bytes.
Example:
The barcode data is “TEST” with terminator <CR><LF>
Chapter 1 BT SPP & USB VCP:
Data Format = <T> + <E> + <S> + <T> + <CR> + <LF> + <BCC>.
BCC = 54h ^ 45h ^ 53h ^ 54h ^ 0Dh ^ 0Ah = 11h
2. BT HID & USB HID:
Data Format = <T> + <E> + <S> + <T> + <Enter> + <BCC>
BCC = 54h ^ 45h ^ 53h ^ 54h ^ E7h = F1h
However, since control character cannot be displayed in Bluetooth HID & USB HID, BCC will be
converted into 2 bytes of characters.
As a result, the data will be: TEST + <Enter> + F + 1
GS Character Replacement
Enable GS Character Replacement Disable GS Character Replacement*
Define Replacement Character
Note:
1. When enabled, the <GS> character in all barcodes will be replaced by the one defined by the
user.
2. To define replacement character, please refer to below:
Example: Set Replacement Character as “X"
Step1: Scan “ Define Replacement Character ”
Step2: Scan “ X ” in Appendix - Upper Case Alphabets
Step3: Scan “ Define Replacement Character ”