
- 31 -
www.hzgrow.com
Instruction code: 0x32
Command (or instruction) package format:
2
bytes
4
bytes
1 byte
2 bytes
1 byte
1 byte
1 byte
1 byte
1 byte
1 byte
2
bytes
Heade
r
Module
address
Package
identifier
Package
length
Instruction
code
Security
Level
Start
Position
Number of
searches
Whether
return
key step
Number
of
fingerpri
nt
search
error
Check
sum
0xEF
01
xxxx
0x01
0x0008
0x32
Safe
Grade
Start ID
num
Config
1
Config2
sum
Security level: 1-5
Starting position: 0-199
End position: 0-199
Return search steps: 0: not allowed 1: Allowed
Fingerprint search error times:
0-0xFF: 0: the operation of image collection and feature search is carried out all the time. If the same
feature ID number is found in the fingerprint database, the operation will exit (0 means the cycle
continues until the matching ID is found or the power is cut off).
1-0xFF: The generated features and fingerprint search were performed on the collected images. If the
match is successful, the ID number and score of the match will be returned, and exit this instruction at
the same time. If the match fails, repeat the previous operations for 1-0xff times. Exit after
corresponding error times. No matter what way, if the system does not detect the finger after sending the
command or collecting the image again for more than 10 seconds, it will exit the command.
Acknowledge package format:
2 bytes
4
bytes
1 byte
2 bytes
1 byte
1 byte
2 bytes
2 bytes
2 bytes
Note
Header
Module
address
Package
identifier
Package
length
Confirmat
ion code
Step
Position
Number
Score
Check
Sum
0xEF01
xxxx
0x07
0x0008
X
1
00
00
Sum
Collect
Image
0xEF01
xxxx
0x07
0x0008
X
2
00
00
Sum
Generate
Feature
0xEF01
xxxx
0x07
0x0008
X
3
Model
ID
Match
score
Sum
Search
Confirmation code=0x00 set successfully
Confirmation code=0x01 set fails
Confirmation code=0x09 failed to search fingerprint
Confirmation code=0x0b the ID is out of range
Confirmation code=0x22 fingerprint template is empty
Confirmation code=0x24 fingerprint library is empty
Confirmation code=0x26 times out