Module Instruction System; System-Related Instructions; Verify Passwoard; Set Password - Velleman VMA329 User Manual

ZFM-70 series provide many instructions. Through combination of different instructions, application
program may realize muti finger authentication functions. All commands/data are transferred in package format.
Refer to 5.1 for the detailed information of package
6.2

System-related instructions

6.2.1

Verify passwoard

Description: Verify Module's handshaking password. (Refer to 4.6 for details)
Input Parameter: PassWord (4 bytes)
Return Parameter: Confirmation code (1 byte)
Instruction code: 13H
Command (or instruction) package format:
Header Module address
2 bytes 4bytes
0xEF01 xxxx
Acknowledge package format:
Header Module address
2 bytes 4bytes
0xEF01 xxxx
Note: Confirmation code = 00H: Correct password;
Confirmation code = 01H: error when receiving package;
Confirmation code = 13H: Wrong password;
6.2.2

Set password

Description: Set Module's handshaking password. (Refer to 4.6 for details)
Input Parameter: PassWord (4 bytes)
Return Parameter: Confirmation code (1 byte)
Instruction code: 12H
Command (or instruction) package format:
Header Module address
2 bytes 4bytes
0xEF01 xxxx
Acknowledge package format:
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ZFM-70 SeriesFingerprint Identification Module User Manual
VI Module Instruction System
Package Package Length
identifier
1 byte 2 bytes
01H 0007H
Package identifier
1 byte
07H
Package Package length
identifier
1 byte 2 bytes
01H 0007H
23
Instruction code Password
1 byte 4 byte
13H PassWord
Package Length Confirmation
code
2 bytes 1 byte
0003H xxH
Instruction code Password
1 byte 4 byte
12H PassWord
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Checksum
2 bytes
sum
Checksum
2 bytes
sum
Checksum
2 bytes
sum