IDTECH Augusta - Nga Protocol Format

Copyright 2019 ID TECH. All rights reserved. Document Number: 80145503-001
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Note that the LRC comes at the end and represents the XOR of all preceding byte values including STX
and ETX.
8.2. NGA Protocol Format
<STX><CLenL><CLenH><Command_Body/Response_Body/Notification/Output
Body/Input Body>…<LRC> <CheckSum><ETX>
• Function Command
Command Format:
<TaskID><F><Command>…
Response:
If valid command and no problem during execution
<ACK>[<Response>]…
Otherwise
<NAK><ErrorCode1>][<ErrorCode2>
• Setting Command
Command Format:
<TaskID> <S> <00> or
<TaskID><S><NoFunc><FuncBlock>
Where:
• <TaskID> <S> <00> means Default the Task
• <All (0x7F)> <S> <00> means Default All
• <NoFunc> is number of function blocks to set in a task. Now only support <NoFunc> = 1
• <FuncBlock> has the following format of <FuncID><Len><FuncData>
• <FuncID> is a one byte Property ID.
• <Len> is a one byte length count for a setting <FuncData>.
• <FuncData> is a setting for a property.
Response:
If valid command and no problem during execution
<ACK>
Or (fail)
<NAK><ErrorCode1><ErrorCode2>
For setting command, reader will scan command first and send back error codes if it found any
error(s), and do setting if no error has been found.
<Unknown ID in Setting/Review list> (1600) and <Setting value out of
range> (1400) will be treated as warning. i.e.: Do setting for other properties but skip setting for
those properties which have warning. Warning will be sent to host.
• Host Review Command
Command Format:
<TaskID><R><00> or