Manual
UART Fingerprint Sensor (C)
V1.0 www.waveshare.com 10 / 18
Byte
1
2
3
4
5
6
7
8
ACK
0xF5
0x23
Hi(Len)
Low(Len)
ACK_SUCCUSS
ACK_FAIL
ACK_TIMEOUT
0
CHK
0xF5
2)Data packet
Byte
1
2
3
4
5---Len+1
Len+2
Len+3
ACK
0xF5
0
0
0
Eigenvalues
CHK
0xF5
Notes: Length of Eigenvalues (Len -3) is 193 bytes.
16. Download eigenvalues and compare with fingerprint acquired(CMD >8 Byte/ACK=8 Byte)
CMD Format:
1)Data head:
Byte
1
2
3
4
5
6
7
8
CMD
0xF5
0x44
Hi(Len)
Low(Len)
0
0
CHK
0xF5
2)Data packet
Byte
1
2
3
4
5---Len+1
Len+2
Len+3
ACK
0xF5
0
0
0
Eigenvalues
CHK
0xF5
Notes:Length of Eigenvalues (Len -3) is 193 bytes.
ACK Format:
Byte
1
2
3
4
5
6
7
8
ACK
0xF5
0x44
0
0
ACK_SUCCUSS
ACK_FAIL
ACK_TIMEOUT
0
CHK
0xF5
17. Download eigenvalues and comparison 1:1(CMD >8 Byte/ACK=8 Byte)
CMD Format:
1)Data head:
Byte
1
2
3
4
5
6
7
8
CMD
0xF5
0x42
Hi(Len)
Low(Len)
0
0
CHK
0xF5
2)Data packet
Byte
1
2
3
4
5---Len+1
Len+2
Len+2
ACK
0xF5
User ID
(High 8 Bit)
User ID
(Low 8 Bit)
0
Eigenvalues
CHK
0xF5
Notes: Length of Eigenvalues (Len -3) is 193 bytes.
ACK Format:
Byte
1
2
3
4
5
6
7
8
ACK
0xF5
0x43
0
0
ACK_SUCCUSS
ACK_FAIL
0
CHK
0xF5
18. Download eigenvalues and comparison 1:N(CMD >8 Byte/ACK=8 Byte)
CMD Format:
1)Data head:
Byte
1
2
3
4
5
6
7
8
CMD
0xF5
0x43
Hi(Len)
Low(Len)
0
0
CHK
0xF5