92
4-14 GOOD_READ_START
Description: the command demands the scanner to start to decode to identify whether the barcode is
readable or not.
Packet Format
<SYN>
<T>
<CR>
0x16
0x54
0x0D
Host Requirements
The host sends GOOD_READ_START to the scanner to identify the barcode is readable or not.
Scanner Requirements
If ACK/NAK handshaking is enabled, the scanner responds with ACK or NAK and then start to decode,
when it receives the GOOD_READ_START command. Otherwise, the scanner will start to decode
directly.
If decodes successfully, the scanner turns off light source and replies “<STX><]><CR><LF>”.
<STX>
<]>
<CR>
<LF>
0x02
0x5D
0x0D
0x0A
When there is no barcode decoded successfully after the Stand-by duration elapsed, the scanner turns
off light source and replies “<STX><CAN><CR><LR>”.
<STX> <CAN> <CR>
<LF>
0x02
0x18
0x0D
0x0A
Note: Only when the Scan mode is Good-read identification, this command is valid.
